#41  
Old 26-09-2020, 04:14 AM
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DeepSkyBagger (Patrick)
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Thanks, Glen. To be honest, it's a pleasure to be able to share them with someone! Alright, here's the next five:

14. NGC 6818 Sgr
Very bright and easy. Visible as a small disc at x83, it actually looks like a planetary disc. The brightness is fairly even, but there is a hint of brightness at the centre. The OIII filter is not needed for this object, and adds nothing to the view.

15. NGC 246 Cet
Very large but pretty faint. Although this planetary nebula has a magnitude of 10.9, it appears very dim because of its low altitude (24 degrees at the time of observation). Three stars were seen to be involved. It appears as an oval disc, elongated roughly N-S with uncertain edges. A darker patch could be seen near the middle. The nebula was barely visible without the OIII filter, the stars were barely visible with.

16. NGC 6891 Del
Very bright, but not much more than stellar at x150. At x450 there is a very bright stellar condensation (possibly a central star) surrounded by a bright disc with fainter extended extremities, which are easily seen with averted vision.

17. IC 2149 Aur
Tiny. Elongation suspected and this was confirmed at x450. There is a bright middle with a slightly fainter periphery. No further detail was discernible.

18. IC 4593 Her
Very bright but very small. The effect of the OIII filter was marginal. Stellar at x83. Blue. The bright central disc was enhanced by faint, elongated ‘wings’ of nebulosity. A bright stellar point was seen, though this is off-centre.
Attached Thumbnails
Click for full-size image (NGC 6818-14170.jpg)
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Click for full-size image (NGC 246-14218.jpg)
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Click for full-size image (NGC 6891-14132.jpg)
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  #42  
Old 27-09-2020, 09:21 PM
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Is this getting a tiny bit boring now?

19. NGC 1514 Tau
Only the bright central star (m9.4) was visible without the OIII filter. With the filter, the nebula presents as a bright, circular disc, brightening towards the central star. It fades away gradually at the edges.

20. NGC 6905 Del
Very bright and very large. It is quite circular and appeared blue. A small central star comes and goes. There is a distinctly brighter patch of nebulosity in the north east. Darker regions to the sides and a brighter band across the nebula make it fascinating to look at and quite beautiful.

21. NGC 7026 Cyg
A tiny spot at x83. Clearly visible at x150 as a small disc with a brighter centre. x375 shows two bright central areas within the nebulosity, which is clearly elongated.

22. NGC 4361 Crv
Pretty bright for its altitude (16.5°). Circular with a bright centre. A central star pops in and out of view. There was possibly the occasional glimpse of a ring structure.

23. NGC 2371/2 Gem
This object looks like two circular nebulae in contact. It looks like a small M76. The more southerly nebula is brighter and has a very bright centre, the other is less condensed. Brighter when seen through the OIII filter. Under very high power (x450), a dark area is visible between the two halves, with a central star (15m) in it.
Attached Thumbnails
Click for full-size image (NGC 1514 - 1317.jpg)
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Click for full-size image (NGC 6905-14124.jpg)
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Click for full-size image (NGC 7026-15145.jpg)
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Click for full-size image (NGC 4361 - 1653.jpg)
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Click for full-size image (NGC 2371 - 1328.jpg)
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  #43  
Old 28-09-2020, 02:06 AM
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glenc (Glen)
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It is not boring Patrick
Excellent work
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  #44  
Old 28-09-2020, 08:20 AM
gaseous (Patrick)
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Not boring at all - excellent sketches, and very motivational.
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  #45  
Old 28-09-2020, 01:05 PM
jahnpahwa (JP)
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NGC6905 sounds great. I'm not bored either
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  #46  
Old 28-09-2020, 09:27 PM
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Many thanks for your comments. Yes, NGC 6905 is a beauty. The brighter and darker regions give it a waisted appearance, and I was struck by its resemblance to a little M27. Here's some more:

24. NGC 2438 Pup
Beautifully located in the open cluster M46, though apparently only as a foreground object. Large and oval. There is a void in the centre and the south-eastern side is brighter than the other.

25. NGC 6309 Oph
Moderately bright. Small and mostly round, but often appears elongated. It is brighter with the OIII filter in place, which also reveals some structure. It is brighter in the middle with an area of faint outer nebulosity. There appears to be a brighter spot at its southern edge. The star to the object's north is not visible through the OIII filter.

26. NGC 6369 Oph
Although I observed this object at transit, it was only 12° above the horizon, and it was not visible without the OIII filter. Small, brightish and circular. The surface brightness looks uneven, being brighter on the north to north-west edge. Averted vision gives a suggestion of annularity, and there is an occasional hint of a central star. I would love to see this object under better skies.

27. NGC 6751 Aql
Fairly bright. Immediately visible at x83. At x450 it appears round and grey, sharply brighter in the middle where there is possibly a central star. The small star to the nebula’s east initially looked nebulous. The object is too dim to stand the OIII filter at x450. The filter made little difference in any case.

28. NGC 6781 Aql
A very odd-shaped nebula. The southern end is brighter with an almost cometary tail to the north. There is a brighter section to the south-east. Fairly large and visible without the OIII filter at x83. The OIII filter adds some detail.
Attached Thumbnails
Click for full-size image (NGC 2438 - 1340.jpg)
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Click for full-size image (NGC 6309 - 1740.jpg)
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Click for full-size image (NGC 6369 - 15139.jpg)
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Click for full-size image (NGC 6751-14133.jpg)
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Click for full-size image (NGC 6781-14136.jpg)
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  #47  
Old 30-09-2020, 09:58 PM
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Right, here's my penultimate offering of planetary nebulae from Glen's list:

29. NGC 2022 Ori
Pretty bright. Slightly elongated and darker in the middle. There is also a dim outer disc of nebulosity. A brighter spot can be seen to the south. There is no sign of a central star. The UHC filter enhances the internal structure, but the OIII filter doesn't help. It appears grey in colour to me.

30. NGC 2346 Mon
'Nebula with star'. A small, round nebula around an 11.6 mag star. Much more obvious when viewed through the OIII filter. Very little detail. Rich field.

31. NGC 6778 Aql (aka NGC 6785)
Small disc at lower powers. Pretty faint but visible to direct vision at x83 with no OIII filter. x375 reveals elongation. Brighter in the middle, but no real sign of a central star. There is some outer, fainter nebulosity. The OIII filter increases the object’s brightness but adds no details.

32. NGC 7048 Cyg
Visible without the OIII filter as a pale grey patch. The OIII filter reveals a bright, beautiful, smooth, almost circular nebula which grows a little brighter towards the middle. A lovely object in a very rich field.

33. NGC 6804 Aql
The OIII filter was not needed for this object. It has a strange triangular shape. It is brighter at the north-east end where it is pointed and a star lies. There is a brighter area along the centre line of the object, where a second, fainter star is involved. Altogether pretty bright and visible at x83 without the OIII filter.
Attached Thumbnails
Click for full-size image (NGC 2022 - 1776.jpg)
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Click for full-size image (NGC 2346 - 1329.jpg)
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Click for full-size image (NGC 6778-14135.jpg)
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Click for full-size image (NGC 7048-15143.jpg)
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Click for full-size image (NGC 6804-14139.jpg)
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  #48  
Old 01-10-2020, 10:55 PM
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OK, here are the final six planetary nebulae from Glen's list that I have observed:

34. IC 1295 Sct
Pretty faint but clearly visible to direct vision with the OIII filter. Difficult without. Quite large, rounded or maybe slightly angular. Averted vision reveals hints of structure, but uncertainly. There are definite hints of a central star. I found this nebula to be astonishingly clear considering how faint it appears on the POSS.

35. NGC 6894 Cyg
Visible at x83 but only with the OIII filter in place. Annularity suspected immediately at x150 with the OIII filter. The ring structure was not always visible and was better with averted vision. Fairly faint, looking like a small ghost of M57. Nice object.

36. NGC 6772 Aql
Large but very dim, it is barely discernible without the OIII filter in place. Even with the filter, it is still difficult. It appears not quite round, being slightly elongated N-S. No variation in brightness was seen across the object.

37. NGC 6058 Her
Visible at x83. Pretty bright, especially considering the brightness of the twilit sky. Round and distinctly not stellar. Sharply brighter in the middle. Central star not seen. Use of the OIII filter increases the object’s apparent diameter noticeably. At x375 there was still no sign of a central star.

38. NGC 6852 Aql
Very dim. Only really visible with the OIII filter in place and even then difficult. It shows a medium sized disc. The centre of the disc is very bright, considerably brighter than the star to its immediate west (mag 13.2). The bright centre, which looks like a star, can only be seen when the OIII filter is not in place. It is invisible with it in. DSFG gives the magnitude of the planetary’s central star as 17.9, so what was it that I saw?

39. NGC 2610 Hya
Pretty difficult, even with the OIII filter in place. The low altitude of 19° didn't help. Quite large and circular. No structure seen. A brighter point was seen at the centre (but only without the OIII filter). This is unlikely to have been the central star which shines at magnitude 15.9.

For contrast, here's another observation I made of NGC 2610, but this time from the rather better, and more southern, skies of the Winter Star Party in Florida. This was with a 16" Newtonian:

Bright and easy. Initially, this object was perceived as a disc, but further investigation revealed a darker centre, giving the object an annular appearance. Elongation estimated in PA about 50°.


Well that's it. I haven't seen any of the other PNs in Glen's list, though I have seen about another 60 he doesn't list. My horizons are limited. Theoretically, my horizon due south is at declination -36°, but light pollution means my realistic horizon is closer to declination -10° or -15°.

I would love to explore the southern sky as I have the northern, and I remember well the pristine skies of the Australian Outback that I experienced back in 1986 when I went there to see Halley's Comet. I didn't have a telescope, of course, only binoculars.

Some day...
Attached Thumbnails
Click for full-size image (IC 1295 - 14149.jpg)
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Click for full-size image (NGC 6894-14108.jpg)
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Click for full-size image (NGC 6772-14134.jpg)
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Click for full-size image (NGC 6058-14106.jpg)
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Click for full-size image (NGC 6852-14141.jpg)
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Click for full-size image (NGC 2610 - 15202.jpg)
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  #49  
Old 09-10-2020, 03:32 PM
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Thanks Patrick for an excellent collection of descriptions and drawings.
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