It’s again a nice sky this evening. I wanted to look back to the supernova in NGC 524. Yesterday evening I was looking at the wrong place. So this time I printed out a picture of NGC 524 together with its surrounding stars and the supernova. I could first not see it but after a while, when my eyes were well adapted to the dark, I found it at 156x. It was visible for around 20% of the time; this to say that it was not that easy. It's the first supernova I see !!
After this nice achievement I decided to do some planetary nebulas.
Location: Boutersem (Belgium)
Equipment: Celestron Advanced Newton 20cm F5
Eyepieces: 24mm and 16mm - Powermate 2,5x
Limit Magnitude 5.0 to 5.3
Seeing: moderate
Time from 19:00 UT to 21:00 UT
IC 3568 – baby Eskimo – planetary nebula of mag 10.4 in Camelopardalis
At 64x I can see a small disc. The object forms a triangle with 2 other stars which are fainter than the nebula. It reacts very well on a OIII filter. Ay 154x the disc becomes very obvious. I can see a bright core surrounded by a dimmer edge. No more details with a OIII filter.
PK 147+4.1 - planetary nebula of 10” of mag 13.8 in Camelopardalis
Not visible at 64x nor at 154x. But with an UHC filter it becomes visible after a while (154x), so the nebula reacts with a slow response time to a filter. I can see now and then a small disc. Afterward I could see the nebula also without filter.
PK 147-2.1 - planetary nebula of 7” of mag 13.4 in Perseus
Not visible at 64x nor at 154x without filter. At 154x with UHC I can see a stellar object with averted vision. It’s visible 80% of the time.
PK 131-5.1 - planetary of mag 14.8 in Perseus: not visible at any magnification
PK 198-6.1 - planetary of mag 12.2 in Orion: not visible
PK 197-14.1 - planetary of 57” of mag 13.9 in Orion
At 104x with UHC it’s visible 50% of the time as a very faint disc.
NGC 2022 - planetary of 32” of mag 11.5 in Orion
I can see a disc but the ring (so the dark centre) is not visible (154x)
Flame nebula
This was like yesterday well visible at 64x with UHC filter.
This was 2 hours well spend. Happy to have seen 4 new planetary nebulas (I had observed NGC 2022 already once in 2005)
Clear skies
Saturday, February 16, 2008
Sunday, February 10, 2008
Deepsky observation on Feb 9, 2008 with Jan Vanautgaerden
According to the weather forecast, Feb 9, 2008 was the warmest day ever on a Feb 9 in Belgium. It was indeed a very nice day with temperatures around 16,5°C.
The night was clear too, although a lot colder. I have been observing together with Jan Vanautgaerden, a very active deepsky observer from Belgium. Jan brought his 15” Obsession with him (lucky me). We have been observing in the fields of Boutersem, on a place where we are not bothered by streetlight and where on top the sky is completely free towards the south.
Transparency was very good, probably close to mag 5.5. I have been observing with my 20cm Newton but did not take notes this time. So all this is based on memory …
All observations are with the 20cm except otherwise noted.
NGC 524 – galaxy of mag 10.3 in Pisces
We started by observing NGC 524 where a supernova has been detected. We used the 20cm scope, not the Obsession because it was not yet installed. Unfortunately, I thought the supernova was in the centre of the galaxy. Apart from the core nothing was visible there. The truth is that the supernova is lying more NE from the visible edge. Need to repeat this for next time. The galaxy itself is not that easy at 64x. 154x is the optimal magnification. Now the galaxy is an easy target, oval and the core is visible. BTW, NGC 524 is a Herschel I (one) object.
I tried to do some Herschel II objects in Eridanus, but nothing was visible.
NGC 2366 – galaxy of mag 10.5 in Camelopardalis
This is also a Herschel II object. A few weeks ago I was not able to see it from my garden, but this time I got it. Not at 64x but at 104x. It’s a long smudge SE of a faint star.
I have to admit that Herschel II list is not getting me really motivated for the moment. It’s really too much at the edge of what I can see with my scope. It’s nice for a while, but not for every night. So what I’ll probably do is to continue Herschel II one in a while between some other observations. So I decided to continue with some other stuff.
Perseus A cluster – NGC 1275 – galaxy in Perseus
NGC 1275 is easily visible at 104x. Also NGC 1278 was visible. I could not detect NGC 1272.
NGC 2359 – Thor’s Helmet – Canis Major
This one I have observed with my own scope and with the 15” Obsession. Thor’s Helmet is a favourite object of Jan. It’s a real nice object which is not really known, maybe because M42 is in the close neighbourhood. With my scope I could almost see a complete circle, together with a part going from east to west. This was of course much more obvious in the 15” scope, where the complete disc became visible. Observation was done with an OIII filter.
NGC 2362 - open cluster in Canis Major
This is a very nice cluster lying around the bright star Tau Cma. Lot’s of fainter stars visible.
We tried to look to Sirius B with the Obsession. Sirius B is around 8” separated from Sirius A. It was not visible. We did not try that hard, though.
Another double star is Rigel, also at 8”. This was separated at 154x with the 20cm scope. Forgot to note the colours.
Orion Nebula M42 and the Trapezium
A beautiful object in the Obsession. We could see with this scope the 6 stars in the trapezium. But also with the 20cm scope we managed to see the 6 stars at 156x. I had seen already 5 stars with my scope but never 6 stars. Mission accomplished today!
NGC 1999 – emission nebula in Orion
Special object. Impressive with the Obsession. A bright circular part, a darker centre, and again a brighter part. With the 20cm scope we could see the 2 bright parts at 154x.
NGC 2024 – Flame nebula in Orion
Observed with the Obsession. Quite strange because it was better visible without filter than with filter. The opposite was true for the 20cm scope. Where the two parts were visible with an UHC filter
NGC 2237 - Rosette Nebula in Monoceros
Again, beautiful with the Obsession. Almost the whole ring was visible with an OIII filter. But also without the aid of any filter, the object was visible. Here also I could see it easily with filter with my scope. Several parts of the ring became apparent. I’ve never seen it so well with my scope. Truly a very good observing session.
NGC 2264 - Xmas Tree in Monoceros
I never succeeded to see the nebula with my scope, but Jan has already seen this one in La Palma. So he knows well where to look, ie at the base and East of it. The issue with the base is the presence of glare, so we were never sure if we have seen some nebula there. We think we have seen some nebula at the east side but I don’t think both of us would put our hand in the fire for it.
Now we went to the other side of the sky, direction Ursa Major
M81 – M82 – galaxies in Ursa Major
M81 and M82 are impressive in the Obsession. We tried to look for the spiral arms of M81 but without success. M82 was also not bad at all in the 20cm. The dark lane was easy.
M92 – planetary in Ursa Major
One eye visible with the 20cm (without filter). It’s very nice in the Obsession where more structure is visible. Probably 2 eyes visible.
We aimed also the 15” to the trio of galaxies in Leo (M66, M65, NGC 3628). Amazing! We ended the night around 1am with observations of M51 (the spiral arms were visible in the 15”), the Whale (with the 20cm) and the Hockeystick, which was very difficult to find with the 20cm. The very last object was M64 where we could see the dark lane with the 20cm.
So although I took a break concerning the Herschel II list I had a very nice observing session together with Jan. It’s very nice when you can observe with a “buddy” and talk about what you see. And comparing views with 2 very different scopes is fun too.
Clear skies to all of you.
The night was clear too, although a lot colder. I have been observing together with Jan Vanautgaerden, a very active deepsky observer from Belgium. Jan brought his 15” Obsession with him (lucky me). We have been observing in the fields of Boutersem, on a place where we are not bothered by streetlight and where on top the sky is completely free towards the south.
Transparency was very good, probably close to mag 5.5. I have been observing with my 20cm Newton but did not take notes this time. So all this is based on memory …
All observations are with the 20cm except otherwise noted.
NGC 524 – galaxy of mag 10.3 in Pisces
We started by observing NGC 524 where a supernova has been detected. We used the 20cm scope, not the Obsession because it was not yet installed. Unfortunately, I thought the supernova was in the centre of the galaxy. Apart from the core nothing was visible there. The truth is that the supernova is lying more NE from the visible edge. Need to repeat this for next time. The galaxy itself is not that easy at 64x. 154x is the optimal magnification. Now the galaxy is an easy target, oval and the core is visible. BTW, NGC 524 is a Herschel I (one) object.
I tried to do some Herschel II objects in Eridanus, but nothing was visible.
NGC 2366 – galaxy of mag 10.5 in Camelopardalis
This is also a Herschel II object. A few weeks ago I was not able to see it from my garden, but this time I got it. Not at 64x but at 104x. It’s a long smudge SE of a faint star.
I have to admit that Herschel II list is not getting me really motivated for the moment. It’s really too much at the edge of what I can see with my scope. It’s nice for a while, but not for every night. So what I’ll probably do is to continue Herschel II one in a while between some other observations. So I decided to continue with some other stuff.
Perseus A cluster – NGC 1275 – galaxy in Perseus
NGC 1275 is easily visible at 104x. Also NGC 1278 was visible. I could not detect NGC 1272.
NGC 2359 – Thor’s Helmet – Canis Major
This one I have observed with my own scope and with the 15” Obsession. Thor’s Helmet is a favourite object of Jan. It’s a real nice object which is not really known, maybe because M42 is in the close neighbourhood. With my scope I could almost see a complete circle, together with a part going from east to west. This was of course much more obvious in the 15” scope, where the complete disc became visible. Observation was done with an OIII filter.
NGC 2362 - open cluster in Canis Major
This is a very nice cluster lying around the bright star Tau Cma. Lot’s of fainter stars visible.
We tried to look to Sirius B with the Obsession. Sirius B is around 8” separated from Sirius A. It was not visible. We did not try that hard, though.
Another double star is Rigel, also at 8”. This was separated at 154x with the 20cm scope. Forgot to note the colours.
Orion Nebula M42 and the Trapezium
A beautiful object in the Obsession. We could see with this scope the 6 stars in the trapezium. But also with the 20cm scope we managed to see the 6 stars at 156x. I had seen already 5 stars with my scope but never 6 stars. Mission accomplished today!
NGC 1999 – emission nebula in Orion
Special object. Impressive with the Obsession. A bright circular part, a darker centre, and again a brighter part. With the 20cm scope we could see the 2 bright parts at 154x.
NGC 2024 – Flame nebula in Orion
Observed with the Obsession. Quite strange because it was better visible without filter than with filter. The opposite was true for the 20cm scope. Where the two parts were visible with an UHC filter
NGC 2237 - Rosette Nebula in Monoceros
Again, beautiful with the Obsession. Almost the whole ring was visible with an OIII filter. But also without the aid of any filter, the object was visible. Here also I could see it easily with filter with my scope. Several parts of the ring became apparent. I’ve never seen it so well with my scope. Truly a very good observing session.
NGC 2264 - Xmas Tree in Monoceros
I never succeeded to see the nebula with my scope, but Jan has already seen this one in La Palma. So he knows well where to look, ie at the base and East of it. The issue with the base is the presence of glare, so we were never sure if we have seen some nebula there. We think we have seen some nebula at the east side but I don’t think both of us would put our hand in the fire for it.
Now we went to the other side of the sky, direction Ursa Major
M81 – M82 – galaxies in Ursa Major
M81 and M82 are impressive in the Obsession. We tried to look for the spiral arms of M81 but without success. M82 was also not bad at all in the 20cm. The dark lane was easy.
M92 – planetary in Ursa Major
One eye visible with the 20cm (without filter). It’s very nice in the Obsession where more structure is visible. Probably 2 eyes visible.
We aimed also the 15” to the trio of galaxies in Leo (M66, M65, NGC 3628). Amazing! We ended the night around 1am with observations of M51 (the spiral arms were visible in the 15”), the Whale (with the 20cm) and the Hockeystick, which was very difficult to find with the 20cm. The very last object was M64 where we could see the dark lane with the 20cm.
So although I took a break concerning the Herschel II list I had a very nice observing session together with Jan. It’s very nice when you can observe with a “buddy” and talk about what you see. And comparing views with 2 very different scopes is fun too.
Clear skies to all of you.
Sunday, February 3, 2008
Observation February 2, 2008
It has been a while, but finally it’s a good night to observe. During the last week there were a couple of good nights, but I have been so busy at my work that in the evening I was not really in a good shape (and mental mood) to observe. Age is getting its effect on me.
But today (Saturday) we continue the Herschel II program. The counter is at 93 so hopefully we’ll reach 100 after this session.
Location: Boutersem (Belgium)
Equipment: Celestron Advanced Newton 20cm F5
Eyepieces: 24mm and 16mm - Powermate 2,5x
Limit Magnitude: 4.9
Seeing: moderate
Time: from 18:30 UT to 22:30 UT
Comet 46P/Wirtanen
But before observing the deepsky objects, let’s start first with a comet. Today comet 46P/Wirtanen goes through its perihelium. At 42x I can see an almost round smudge of 7’. A slightly brighter core is visible. The visibility enhances at 64x. The object reacts very well to a deepsky filter. Now the core is easily to see.
NGC 1663 – open cluster in Orion
This is a difficult object. It’s by the way not correctly located in my planetarium software. I had to search on the DSS image to indicate the correct location on my finder chart. At 154x I can see with averted vision some 5 to 10 starts in an area of 10’. It’s a loose cluster situated north of a little arc of 3 bright stars.
NGC 7762 – open cluster in Cepheus
At 64x I see 10 stars of moderate brightness in an area of 15’. It’s a very loose cluster. At 154x a small concentration of 5 stars (5’) is visible in the centre of the cluster.
NGC 7419 – open cluster in Cepheus
At 154x 4 stars are visible with averted vision at the east side of a triangle of 3 stars, of which one is quite bright. That one is slightly orange.
NGC 1184 – galaxy of 12.4 in Cepheus
At 104x it’s once in a while visible with averted vision. It’s an elongated smudge of 2’ in the direction NW-SE. No core. The galaxy becomes better visible at 154x.
NGC 1175 – galaxy of 12.8 in Cepheus
A very difficult object. A few times visible at 154x. Located between 2 stars but they don’t form a straight line.
NGC 1193 – open cluster of 12.6 in Perseus
not found
NGC 1207 – galaxy 12.7 in Perseus
I have seen a little smudge on the right place but only 1 time. I could not repeat the observation so I cannot consider this as a certain observation
NGC 1605 – open cluster of 10.7 in Perseus
Nothing to see at the location of this cluster.
NGC 890 – galaxy of mag 11.30 in Triangulum
At 154x this is a elongated smudge of 2’ – almost continuously visible. No core visible. Located east of a triangle of 3 faint stars.
NGC 925 – galaxy of 9.9 in Traingulum
This is a large galaxy of 11’x6’. I’m not sure if I have seen it.
NGC 1060 – galaxy of mag 12.0 in Triangulum
Visible now and then with 64x. Somewhat better visible at 104x. A smudge of 2’ without a core.
NGC 2367 – open cluster in Canis Major
This is an open cluster of 10’. At 64x I can see 2 bright stars and a few faint ones. No more stars visible at 154x
NGC 2374 – open cluster in Canis Major
This open cluster is 20’ large. At 64x there is a mix of quite some moderate bright stars and faint stars. I guess I can see something like 40 stars. It’s a moderately concentrated cluster. SW of the clusters there is an area of 5’ with a higher concentration of stars.
NGC 2359 – Thor’s Helmet- emission nebula in Canis Major
At 64x without filter it’s not visible. It becomes apparent with a deepsky filter. It’s a nebula of an irregular shape of 10’ in which a few stars are visible. The shape is hard to define. Optimum magnification is 104x (again with deepsky filter). The nebula seems to consist out of 2 parts, of which the northern part is the most bright one. I did not use an OIII filter because I thaught this was a diffuse nebula.
I stopped around 22:30 UT. I have been able to see 9 Herschell II objects which means 103 out of the 400 have been seen. Not bad.
Clear skies to all of you
But today (Saturday) we continue the Herschel II program. The counter is at 93 so hopefully we’ll reach 100 after this session.
Location: Boutersem (Belgium)
Equipment: Celestron Advanced Newton 20cm F5
Eyepieces: 24mm and 16mm - Powermate 2,5x
Limit Magnitude: 4.9
Seeing: moderate
Time: from 18:30 UT to 22:30 UT
Comet 46P/Wirtanen
But before observing the deepsky objects, let’s start first with a comet. Today comet 46P/Wirtanen goes through its perihelium. At 42x I can see an almost round smudge of 7’. A slightly brighter core is visible. The visibility enhances at 64x. The object reacts very well to a deepsky filter. Now the core is easily to see.
NGC 1663 – open cluster in Orion
This is a difficult object. It’s by the way not correctly located in my planetarium software. I had to search on the DSS image to indicate the correct location on my finder chart. At 154x I can see with averted vision some 5 to 10 starts in an area of 10’. It’s a loose cluster situated north of a little arc of 3 bright stars.
NGC 7762 – open cluster in Cepheus
At 64x I see 10 stars of moderate brightness in an area of 15’. It’s a very loose cluster. At 154x a small concentration of 5 stars (5’) is visible in the centre of the cluster.
NGC 7419 – open cluster in Cepheus
At 154x 4 stars are visible with averted vision at the east side of a triangle of 3 stars, of which one is quite bright. That one is slightly orange.
NGC 1184 – galaxy of 12.4 in Cepheus
At 104x it’s once in a while visible with averted vision. It’s an elongated smudge of 2’ in the direction NW-SE. No core. The galaxy becomes better visible at 154x.
NGC 1175 – galaxy of 12.8 in Cepheus
A very difficult object. A few times visible at 154x. Located between 2 stars but they don’t form a straight line.
NGC 1193 – open cluster of 12.6 in Perseus
not found
NGC 1207 – galaxy 12.7 in Perseus
I have seen a little smudge on the right place but only 1 time. I could not repeat the observation so I cannot consider this as a certain observation
NGC 1605 – open cluster of 10.7 in Perseus
Nothing to see at the location of this cluster.
NGC 890 – galaxy of mag 11.30 in Triangulum
At 154x this is a elongated smudge of 2’ – almost continuously visible. No core visible. Located east of a triangle of 3 faint stars.
NGC 925 – galaxy of 9.9 in Traingulum
This is a large galaxy of 11’x6’. I’m not sure if I have seen it.
NGC 1060 – galaxy of mag 12.0 in Triangulum
Visible now and then with 64x. Somewhat better visible at 104x. A smudge of 2’ without a core.
NGC 2367 – open cluster in Canis Major
This is an open cluster of 10’. At 64x I can see 2 bright stars and a few faint ones. No more stars visible at 154x
NGC 2374 – open cluster in Canis Major
This open cluster is 20’ large. At 64x there is a mix of quite some moderate bright stars and faint stars. I guess I can see something like 40 stars. It’s a moderately concentrated cluster. SW of the clusters there is an area of 5’ with a higher concentration of stars.
NGC 2359 – Thor’s Helmet- emission nebula in Canis Major
At 64x without filter it’s not visible. It becomes apparent with a deepsky filter. It’s a nebula of an irregular shape of 10’ in which a few stars are visible. The shape is hard to define. Optimum magnification is 104x (again with deepsky filter). The nebula seems to consist out of 2 parts, of which the northern part is the most bright one. I did not use an OIII filter because I thaught this was a diffuse nebula.
I stopped around 22:30 UT. I have been able to see 9 Herschell II objects which means 103 out of the 400 have been seen. Not bad.
Clear skies to all of you
Sunday, January 13, 2008
Observation January 12, 2008
Yesterday night was the 3rd clear night of January. It's going to be a good month from an observation point of view.
The objective of this session is to continue the Herschel II list.
Location: Boutersem (Belgium)
Equipment: Celestron Advanced Newton 20cm F5
Eyepieces: 24mm and 16mm - Powermate 2,5x
Limit Magnitude 5.3
Seeing: moderate
Time from 18:30 UT to 00:00 UT with a gap of 2 hours due to clouds
Comet Holmes is still visible with the naked eye.
NGC 2366 – galaxy of mag 10.50 in Camelopardalis.
It’s a long one (7’) so surface brightness is low. Not sure I have seen it.
NGC 2274 – galaxy of mag 12.40 in Camelopardalis.
At 104x I can see it once in a while when moving the tube. It’s better visible at 154x – a round smudge of 3’. I'm not sure if I have seen a core.
NGC 2112 – open cluster in Orion
At 64x I can see 4 faint stars and 1 moderate bright star in an area of 10’. At 104x the cluster is better visible with its 9 stars. The cluster stands really loose from the background.
NGC 1662 – open cluster in Orion
This is a loose open cluster. At 64x 8 bright stars are visible, together with another 7 faint ones. 3 of those bright stars makes a triangle in the centre of the cluster with one of them being orange.
NGC 1762 – galaxy of mag 12.7 in Orion
At 104x the galaxy is almost continuously visible with averted vision. It’s a round smudge of 1’. The foreground star is only visible with averted vision but not at the same time as the galaxy. Interesting object.
NGC 1750 and 1746 – open cluster in Taurus
NGC 1746 is a large open cluster of 40’. It contains many bright and faint stars, I estimate more than 50 stars. At the west side there is a small arc of bright stars. NGC 1750 is the eastern part of NGC 1746 although I cannot see any reason for giving a new number. This just seems to be the same cluster. It’s the area with most of the bright stars. At the north-east side there is a 10’ area with a higher concentration of faint stars.
NGC 1587 – galaxy of mag 11.7 in Taurus
Suspected at 64x. Obvious at 104x but not continuously visible. It’s an oval of 3’ with its longest elongation going from NW to SE. The core is not visible. The galaxy is located between 2 bright stars. I could not look for NGC 1589 because clouds are hiding the field
NGC 1582 – open cluster in Perseus
64x. A loose cluster of 30’ with 8 bright stars and around 30 faint stars. The centre contains almost no stars. One of the bright stars is slightly orange.
NGC 1624 – open cluster and emission nebula in Perseus
At 64x I can see 3 stars laying in a nebula of 5’. At 104x one of the 3 stars is looking brighter than the other 2. The nebula is well visible.
NGC 1605– open cluster in Perseus
I can see 2 stars in the area where this cluster should be located, nothing more.
NGC 1579 – reflection nebula in Perseus
Easily visible at 64x. It’s located south of a moderate bright star. It’s around 5’ big and its shape is irregular. The centre is brighter than the edges. At 104x visibility is enhanced.
NGC 1348 – open cluster in Perseus
At 64x I see an unresolved smudge of 5’ with 2 faint stars. 5 to 6 stars become visible at 104x.
NGC 1207 – galaxy of mag 12.7 in Perseus
Probably seen at 156x – located between 2 faint stars
NGC 1193 – open cluster of mag 12.6 in Perseus
At 156x I see 2 stars and maybe an unresolved smudge. At its west there is a double star with an orange companion.
NGC 1175 – galaxy of mag 12.8 in Perseus
Maybe visible at 156x
NGC 1003 – galaxy of mag 11.3 in Perseus
At 104x it’s a smudge of 2’ located close to a faint stars. Also visible at 154x.
Up to here for Herschel II objects. I’m getting too tired to look for such faint objects. So it’s time to do something more easier.
As Canis Major is well visible now I decided to explore a bit this constellation.
M41 – no notes
NGC 2360 – open cluster in Canis Major
This is a quite concentrated cluster of 25’. At 64x it contains something like 30 stars of which none are bright.
NGC 2362 – open cluster in Canis Major
This is a cluster with a triangle shape. 20 stars in an area of 15’. A bright star is located in the middle of the triangle.
145 Cma (h3945) – double star mag 4.8 – 6.8; 26”
This is a very nice double star. The primary is orange and the secondary is blue. Well separated. Reminds me of Albireo. Beautiful. I recommend you to look for this one.
Arrowhead cluster – asterism in Canis Major
This is an asterism with 7 bright stars and has a shape of an arrowhead.
“Number 3” cluster – asterism in Canis Major
This is an asterism with 20 stars forming a shape of a “3”.
If someone knows the catalogue numbers of the last 2 objects I will be glad to hear it from you.
Up to know I have seen 89 Herschel II objects. It's in fact more because I didn't log the observation of January 6 yet when I have seen 5 or 6 HII objects. I don't think I will be able to see all of them with a 20cm scope, certainly not from Belgium. If I can see, from Belgium and the Provence, 350 oout of the 400 I think it's going to be a nice achievement.
Clear skies to you
Olivier
The objective of this session is to continue the Herschel II list.
Location: Boutersem (Belgium)
Equipment: Celestron Advanced Newton 20cm F5
Eyepieces: 24mm and 16mm - Powermate 2,5x
Limit Magnitude 5.3
Seeing: moderate
Time from 18:30 UT to 00:00 UT with a gap of 2 hours due to clouds
Comet Holmes is still visible with the naked eye.
NGC 2366 – galaxy of mag 10.50 in Camelopardalis.
It’s a long one (7’) so surface brightness is low. Not sure I have seen it.
NGC 2274 – galaxy of mag 12.40 in Camelopardalis.
At 104x I can see it once in a while when moving the tube. It’s better visible at 154x – a round smudge of 3’. I'm not sure if I have seen a core.
NGC 2112 – open cluster in Orion
At 64x I can see 4 faint stars and 1 moderate bright star in an area of 10’. At 104x the cluster is better visible with its 9 stars. The cluster stands really loose from the background.
NGC 1662 – open cluster in Orion
This is a loose open cluster. At 64x 8 bright stars are visible, together with another 7 faint ones. 3 of those bright stars makes a triangle in the centre of the cluster with one of them being orange.
NGC 1762 – galaxy of mag 12.7 in Orion
At 104x the galaxy is almost continuously visible with averted vision. It’s a round smudge of 1’. The foreground star is only visible with averted vision but not at the same time as the galaxy. Interesting object.
NGC 1750 and 1746 – open cluster in Taurus
NGC 1746 is a large open cluster of 40’. It contains many bright and faint stars, I estimate more than 50 stars. At the west side there is a small arc of bright stars. NGC 1750 is the eastern part of NGC 1746 although I cannot see any reason for giving a new number. This just seems to be the same cluster. It’s the area with most of the bright stars. At the north-east side there is a 10’ area with a higher concentration of faint stars.
NGC 1587 – galaxy of mag 11.7 in Taurus
Suspected at 64x. Obvious at 104x but not continuously visible. It’s an oval of 3’ with its longest elongation going from NW to SE. The core is not visible. The galaxy is located between 2 bright stars. I could not look for NGC 1589 because clouds are hiding the field
NGC 1582 – open cluster in Perseus
64x. A loose cluster of 30’ with 8 bright stars and around 30 faint stars. The centre contains almost no stars. One of the bright stars is slightly orange.
NGC 1624 – open cluster and emission nebula in Perseus
At 64x I can see 3 stars laying in a nebula of 5’. At 104x one of the 3 stars is looking brighter than the other 2. The nebula is well visible.
NGC 1605– open cluster in Perseus
I can see 2 stars in the area where this cluster should be located, nothing more.
NGC 1579 – reflection nebula in Perseus
Easily visible at 64x. It’s located south of a moderate bright star. It’s around 5’ big and its shape is irregular. The centre is brighter than the edges. At 104x visibility is enhanced.
NGC 1348 – open cluster in Perseus
At 64x I see an unresolved smudge of 5’ with 2 faint stars. 5 to 6 stars become visible at 104x.
NGC 1207 – galaxy of mag 12.7 in Perseus
Probably seen at 156x – located between 2 faint stars
NGC 1193 – open cluster of mag 12.6 in Perseus
At 156x I see 2 stars and maybe an unresolved smudge. At its west there is a double star with an orange companion.
NGC 1175 – galaxy of mag 12.8 in Perseus
Maybe visible at 156x
NGC 1003 – galaxy of mag 11.3 in Perseus
At 104x it’s a smudge of 2’ located close to a faint stars. Also visible at 154x.
Up to here for Herschel II objects. I’m getting too tired to look for such faint objects. So it’s time to do something more easier.
As Canis Major is well visible now I decided to explore a bit this constellation.
M41 – no notes
NGC 2360 – open cluster in Canis Major
This is a quite concentrated cluster of 25’. At 64x it contains something like 30 stars of which none are bright.
NGC 2362 – open cluster in Canis Major
This is a cluster with a triangle shape. 20 stars in an area of 15’. A bright star is located in the middle of the triangle.
145 Cma (h3945) – double star mag 4.8 – 6.8; 26”
This is a very nice double star. The primary is orange and the secondary is blue. Well separated. Reminds me of Albireo. Beautiful. I recommend you to look for this one.
Arrowhead cluster – asterism in Canis Major
This is an asterism with 7 bright stars and has a shape of an arrowhead.
“Number 3” cluster – asterism in Canis Major
This is an asterism with 20 stars forming a shape of a “3”.
If someone knows the catalogue numbers of the last 2 objects I will be glad to hear it from you.
Up to know I have seen 89 Herschel II objects. It's in fact more because I didn't log the observation of January 6 yet when I have seen 5 or 6 HII objects. I don't think I will be able to see all of them with a 20cm scope, certainly not from Belgium. If I can see, from Belgium and the Provence, 350 oout of the 400 I think it's going to be a nice achievement.
Clear skies to you
Olivier
Monday, January 7, 2008
PK 111-2.1 (Hubble 12) - bis
As I said in my previous post, whenever it will be clear again I will look once more for Hubble 12. Yesterday, January 6 was clear and yes, I can confirm I saw PK 112-2.1 without any doubt with my 20 cm scope
At 64x it was easily visible as a stellar object, and it reacted positively on an OIII filter. At this magnification I could see only 1 star next to the nebula. But at 104x I could see the 2 stars next to the nebula exaclty like on my finder chart. The object itself remains stellar at 104x
I have seen yesterday evening many other objects from the HII list and other planetaries, but that's a topic for another post.
Clear Skies
Olivier
At 64x it was easily visible as a stellar object, and it reacted positively on an OIII filter. At this magnification I could see only 1 star next to the nebula. But at 104x I could see the 2 stars next to the nebula exaclty like on my finder chart. The object itself remains stellar at 104x
I have seen yesterday evening many other objects from the HII list and other planetaries, but that's a topic for another post.
Clear Skies
Olivier
Saturday, January 5, 2008
PK 111-2.1 (Hubble 12)
In my previous post I talked about my observation of PK 111-2.1. This is what I mentioned:
PK 111-2.1 – planetary nebula of 2” of mag 13.0 in Cassiopeia
This nebula is situated next to 2 faint stars. So I should see 3 stars, but unfortunately I can see only 2. One star is a bit brighter than the other one. Both stars are of mag 11.5 and 11.7 so I have to conclude I don't seen PK 111-2.1. Who could confirm the nebula is fainter than those 2 stars? Note: http://www.deepskylog.be/ gives magnitude 14.0. Eye&Telescope gives mag 13.0
Well, after some discussions on the dutch astronomy mailing list it seems I have been able to see the planetary. The nebula itself is of magnitude 11.9, the central star is of magnitude 14.0.
A picture of http://www.blackskies.org/ confirms the situation (I'm not sure I'm allowed to post this picture, so if you are interested please go to the blackskies website).
Whenever the sky is clear I will observe once more this object.
Clear Skies
Olivier
PK 111-2.1 – planetary nebula of 2” of mag 13.0 in Cassiopeia
This nebula is situated next to 2 faint stars. So I should see 3 stars, but unfortunately I can see only 2. One star is a bit brighter than the other one. Both stars are of mag 11.5 and 11.7 so I have to conclude I don't seen PK 111-2.1. Who could confirm the nebula is fainter than those 2 stars? Note: http://www.deepskylog.be/ gives magnitude 14.0. Eye&Telescope gives mag 13.0
Well, after some discussions on the dutch astronomy mailing list it seems I have been able to see the planetary. The nebula itself is of magnitude 11.9, the central star is of magnitude 14.0.
A picture of http://www.blackskies.org/ confirms the situation (I'm not sure I'm allowed to post this picture, so if you are interested please go to the blackskies website).
Whenever the sky is clear I will observe once more this object.
Clear Skies
Olivier
Friday, January 4, 2008
Observation January 2, 2008
This is the first observation this year with a telescope. It's quite cold (something around -3 °C). I'm going for a few Herschel II objects and planetary nebula's
Location: Boutersem (Belgium)
Material: Celestron Advanced GoTo Newton 20cm (8") F5
Eyepieces: Panoptic 24mm and Nagler 16mm - Powermate 2,5x
Naked Eye Limit Magnitude: starting with less than 5.0, ending with somewhat higher than 5.0
Seeing: moderate
Timing: 18:00 UT to 22:30 UT
But we'll start with 2 comets.
Comet Holmes
Visible with naked eye. But it's difficult because it's not yet completely dark. Through the 7x50 finder Holmes is a large round object but still difficult to see. Also at 42x the comet is hardly visible. I can see some nebulosity in the shape of an arc. This arcs becomes a bit more visible with a deepsky filter. Now I can see half of a circle. What a difference with the observations during October and November.
Comet Tuttle
Tuttle is not visible with the naked eye. It's barely visible with my binoculars. But through the finder (7x50) Tuttle is round with a small but bright core. At 64x I can see a coma of 10' with a faint nucleus. The coma is surrounded by some nebula which is round and 25' large. One star is visible through this nebula. A deepsky filter enhances the visibility. The shape looks more triangular than round.
M33 en NGC 604 – galaxy and HII region in Triangulum
NGC 604 is visible at 64x with deepsky filter. It's surprisingly easy to see although averted vision is necessary. At 154x (and deepsky filter) the object is elongated (2:1) and one side seems brighter than the other one.
NGC 513 – galaxy of mag 12.9 in Andromeda
This is a Herschel II object. Difficult. Only visible at 156x and with averted vision. Size is 2’.
NGC 499 – galaxy of mag 12.2 in Pisces
This one is in the neighbourhood of NGC 513. At 156x it's quite easily visible with averted vision. NGC 499 has an oval shape of 3'.
NGC 507 – galaxy of mag 11.3 in Pisces
Also this one is in the neighbourhood of NGC 513. At 156x NGC 507 is a large round object of 4 to 5' with a small core. More difficult than NGC 499.
NGC 7640 – galaxy of mag 11.3 in Andromeda
This is a very difficult object. It's 10' long (!) and hence it has a low surface brightness (SB: 14.5). According to Eye&Telescope the contrast reserve is -0.25, so it would not be visible with my scope. Indeed, at low power I see nothing at all. Maybe, but I say maybe, I can see the South-East side at 154x.
NGC 214 – galaxy of mag 12.2 in Andromeda
At 104x I can see an oval of 3'. Averted vision is required to see this object. The elongation is 2:1 and the direction is NE-SW.
These were the Herschel II objects. Now we have some planetary nebulas in Cassiopeia.
IC 289 – planetary nebula of 35” of mag 13.3 in Cassiopeia
From time to time visible at 154x with OIII filter. It's very difficult, but once in while a disc is visible.
IC 1747 – planetary nebula of 13” of mag 12.1 in Cassiopeia
This one is visible with direct vision at 154x without the aid of any filter. I see a little disc with a bright centre. It reacts very well with an OIII filter.
PK 119-6.1 – planetary nebula of 8” of mag 12.2 in Cassiopeia
At 156x PK 119-6.1 is easily visible as a "star". Observation is confirmed with an OIII filter because it reacts very well.
PK 118-8.1 – planetary nebula of 9” of mag 12.5 in Cassiopeia
Also this one is looking as a star at 156x. Observation is confirmed by OIII and UHC filter. The faint star of mag 12.9 near the nebula was not visible.
PK 111-2.1 – planetary nebula of 2” of mag 13.0 in Cassiopeia
This nebula is situated next to 2 faint stars. So I should see 3 stars, but unfortunately I can see only 2. One star is a bit brighter than the other one. Both stars are of mag 11.5 and 11.7 so I have to conclude I don't seen PK 111-2.1. Who could confirm the nebula is fainter than those 2 stars? Note: http://www.deepskylog.be/ gives magnitude 14.0. Eye&Telescope gives mag 13.0
After all those faint objects it is time for showpiece such a M42 and M43. This was only for a short period, because my Celestron Powertank ran empty. This is strange because it was completely charged before starting to observe. It's a pity because I wanted to continue for 1/2 hour with Herschel II objects in Auriga and Taurus.
Anyway, the evening is a success: 2 comets, 3 HII objects and 4 new planetary nebulas.
Clear skies to you
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