A B E L L     P l a n e t a r y     N e b u l a


Abell-50,     (NGC6742)


        created: 12-02-2017.             revised: 09-27-2022.

Hello!

Planetary Nebulae are clouds of interstellar matter, thin but widespread shells of gas and dust. They mark where a star is slowly dying, and is ejecting material into interstellar space during its later life stages. On cosmic timescales, planetary nebulae undergo rapid changes and have only comparatively short lifetimes, so that those we observe are all relatively young objects. Planetary nebulae usually have only a few thousand years before they fade and spread their matter into the interstellar environment.



American astrophysicist George Abell, (1927 - 1983), graduated from from the California Institute of Technology.
(B.S. in 1951, M.S. in 1952, and Ph.D. in 1957.)

Using the Palomar 48-inch Schmidt telescope, Abell compiled a catalog of 86 very old, faint planetary nebula, which was first published in 1955 titled "Properties of Some Old Planetary Nebula", and expanded several times with the final version in 1966.
(note - 4 objects on the original list have since been determined to be either non-existent or another type of deep-sky object, so there are really only 82 objects observable)

Abell's catalog is recognized as an excellent compilation of faint, challenging planetaries for the observer with access to large telescopes and dark skies. For the most part, due to being very old, large, and having a very low surface brightness, they can be difficult to observe. O-III filters can be a big help, allowing the nebula to 'pop' from the dimmed field. (though sometimes it can actually make the nebula harder to see).

         



Amatuer Astronomer Alvin Huey has a guidebook available on his website faintfuzzies:
that contains finder charts along with CCD images and visual observations of all the Abell Planetary nebula.



Here's a few interesting links:

Steve Gottlieb's Adventures - Planetary Nebula:
Uwe Glahn (visual descriptions and images)
Reiner Vogel (downlod observing guide)


Below is my personal observation list of the 'Abell Planetary Nebulas'.

I currently have 73 out of 82 objects visible from my Pittsburgh, PA latitude of around +40.
All of my EAA Observaytions were taken using a StellaCam-3 peltier-cooled deepsky video camera, or a ZWO ASI294MC camera. Each image has minimal processing applied to it: brightness/contrast adjusted, image rotated to match that of Alvin Huey's book, and resized to have the same general field size across images. The 'Negative' image is a little more heavily processed to help bring out the nebula.
Most of these are very faint, even with long exposures and using a O-III filter, or a L-eNhance narrowband filter.



Vorontsov-Velyaminov planetary nebula classification type:
1 Stellar Image   
2 Smooth disk (a, brighter toward center; b, uniform brightness; c, traces of a ring structure)   
3 Irregular disk (a, very irregular brightness distribution; b, traces of ring structure)   
4 Ring structure   
5 Irregular form, similar to a diffuse nebula   
6 Anomalous form   

Index:

Arp Object NGC / IC Constellation
Abell-1: Cepheus
Abell-2: Cassiopeia
Abell-3: Cassiopeia
Abell-4: Perseus
Abell-5: Perseus
Abell-6: Cassiopeia
Abell-7: Lepus
Abell-8: Auriga
Abell-9: Auriga
Abell-10: Orion
Abell-11: mistaken reflection nebula - non-existant
Abell-12: Orion
Abell-13: Orion
Abell-14: Orion
Abell-15: Canis Major
Abell-16: Lynx
Abell-17: non-existant
Abell-19: Gemini
Abell-21: Gemini
Abell-22: Canis Minor
Abell-24: Canis Minor
Abell-30: Cancer
Abell-31: Cancer
Abell-32: photo plate fault - non-existant
Abell-33: Hydra
Abell-34: Hydra
Abell-36: Virgo
Abell-37: IC972 Virgo
Abell-38: Scorpius
Abell-39: Hercules
Abell-40: Ophiuchus
Abell-41: Serpens
Abell-42: Ophiuchus
Abell-43: Ophiuchus
Abell-44: Sagittarius
Abell-45: Scutum
Abell-46: Lyra
Abell-47: Serpens
Abell-48: Aquila
Abell-49: Scutum
Abell-50: NGC6742 Draco
Abell-51: Sagittarius
Abell-52: Aquila
Abell-53: Aquila
Abell-54: Vulpecula
Abell-55: Aquila
Abell-56: Aquila
Abell-57: Vulpecula
Abell-58: Aquila
Abell-59: Sagitta
Abell-60: Sagittarius
Abell-61: Cygnus
Abell-62: Aquila
Abell-63: Sagitta
Abell-64: Aquila
Abell-65: Sagittarius
Abell-66: Sagittarius
Abell-67: Aquila
Abell-68: Vulpecula
Abell-69: Cygnus
Abell-70: Aquila
Abell-71: Cygnus
Abell-72: Delphinus
Abell-73: Cepheus
Abell-74: Vulpecula
Abell-75: Cepheus
Abell-76: mistaken ring galaxy - non-existant
Abell-77: Cepheus
Abell-78: Cygnus
Abell-79: Lacerta
Abell-80: Lacerta
Abell-81: Cepheus
Abell-82: Cassiopeia
Abell-83: Cassiopeia
Abell-84: Cassiopeia
Abell-85: SNR - CTB1 Cassiopeia
Abell-86: Cepheus


Abell Planetary Nebula Observations:



Abell-1 (planetary nebula) - 07/25/2022 - 8" SCT f6.3, Atlas Gem, ASI294MC @ 180 seconds for 15 minutes (L-eNhance)
Cepheus    Type-2b    Mag+18.3    Size 42x42
      

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Abell-2 (planetary nebula) - 09/23/2017 - 8" SCT f6.3, StellaCam-3 @ 3 minutes (O-III filter)
Cassiopeia    Type-2c    Mag+16.3    Size 33x29
      

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Abell-2 (planetary nebula) - 10/21/2017 - 8" SCT f6.3, StellaCam-3 @ 3 minutes (no filter)
Cassiopeia    Type-2c    Mag+16.3    Size 33x29
      

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Abell-3 (planetary nebula) - 11/07/2021 - 8" SCT f6.3, ASI294MC @ 60 seconds for 30 minutes (L-eNhance)
Cassiopeia    Type-3b    Mag+18.2    Size 60x60
      

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Abell-4 (planetary nebula) and Galaxy CGCG539-91 - 10/05/2018 - 8" SCT f6.3, StellaCam-3 @ 3 minutes (no filter)
Perseus    Type-3b    Mag+16.7    Size 22x22
      

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Abell-5 (planetary nebula) - 10/05/2018 - 8" SCT f6.3, StellaCam-3 @ 3 minutes (no filter)
Perseus    Type-4    Mag+16    Size 134x121
      

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Abell-6 (planetary nebula) - 06/27/2022 - 8" SCT f6.3, Atlas Gem, ASI294MC @ 180 seconds for 27 minutes (L-eNhance)
Cassiopeia    Type-2b    Mag+15.5    Size 188x174
      

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Abell-7 (planetary nebula) - 12/04/2021 - 8" SCT f6.3, Atlas Gem, ASI294MC @ 180 seconds for 30 minutes (L-eNhance)
Lepus    Type-3a    Mag+13.2    Size 871x670
      

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Abell-8 (planetary nebula) - 10/05/2018 - 8" SCT f6.3, StellaCam-3 @ 3 minutes (no filter)
Auriga    Type-2b    Mag+16.6    Size 62x62
      

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Abell-9 (planetary nebula) - 12/04/2021 - 8" SCT f6.3, Atlas Gem, ASI294MC @ 180 seconds for 30 minutes (L-eNhance)
Auriga    Type-4    Mag+18.9    Size 40x34
      

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Abell-10 (planetary nebula) - 10/05/2018 - 8" SCT f6.3, StellaCam-3 @ 3 minutes (no filter)
Orion    Type-3    Mag+15.2    Size 35x32
      

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Abell-12 (planetary nebula) - 10/05/2018 - 8" SCT f6.3, StellaCam-3 @ 3 minutes (no filter)
Orion    Type-2b    Mag+13.9    Size 37x37
      

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Abell-13 (planetary nebula) - 10/05/2018 - 8" SCT f6.3, StellaCam-3 @ 3 minutes (no filter)
Orion    Type-4    Mag+16    Size 174x134
      

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Abell-14 (planetary nebula) - 12/04/2021 - 8" SCT f6.3, Atlas Gem, ASI294MC @ 180 seconds for 30 minutes (L-eNhance)
Orion    Type-2c    Mag+18.2    Size 40x27
      

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Abell-15 (planetary nebula) - 12/04/2021 - 8" SCT f6.3, Atlas Gem, ASI294MC @ 180 seconds for 30 minutes (L-eNhance)
Canis Major    Type-4    Mag+16.3    Size 34x34
      

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Abell-16 (planetary nebula) - 09/19/2022 - 8" SCT f6.3, Atlas Gem, ASI294MC @ 180 seconds for 15 minutes (L-eNhance)
Lynx    Type-2b    Mag+15.9    Size 143x133
      

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Abell-19 (planetary nebula) - 12/04/2021 - 8" SCT f6.3, Atlas Gem, ASI294MC @ 180 seconds for 30 minutes (L-eNhance)
Gemini    Type-2b    Mag+17.0    Size 80x67
      

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Abell-21 (planetary nebula) - 10/05/2018 - 8" SCT f6.3, StellaCam-3 @ 3 minutes (no filter)
Gemini    Type-6    Mag+11.3    Size 744x509
      

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Abell-22 (planetary nebula) - 10/05/2018 - 8" SCT f6.3, StellaCam-3 @ 3 minutes (no filter)
Canis Minor    Type-3    Mag+15.4    Size 105x68
      

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Abell-24 (planetary nebula) - 10/05/2018 - 8" SCT f6.3, StellaCam-3 @ 3 minutes (O-III filter)
Canis Minor    Type-4    Mag+13.6    Size 265x180
      

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Abell-30 (planetary nebula) - 03/20/2022 - 8" SCT f6.3, Atlas Gem, ASI294MC @ 60 seconds for 30 minutes (L-eNhance)
Cancer    Type-2c    Mag+15.6    Size 127x127
      

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Abell-31 (planetary nebula) - 02/20/2022 - 8" SCT f6.3, Atlas Gem, ASI294MC @ 60 seconds for 30 minutes (L-eNhance)
Cancer    Type-3a    Mag+12.2    Size 970x930
      

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Abell-33 (planetary nebula) - 03/20/2022 - 8" SCT f6.3, Atlas Gem, ASI294MC @ 60 seconds for 30 minutes (L-eNhance)
Hydra    Type-2b    Mag+13.4    Size 275x260
      

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Abell-34 (planetary nebula) - 03/21/2022 - 8" SCT f6.3, Atlas Gem, ASI294MC @ 60 seconds for 30 minutes (L-eNhance)
Hydra    Type-2b    Mag+14.5    Size 281x268
      

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Abell-36 (planetary nebula) - 06/04/2022 - 8" SCT f6.3, Atlas Gem, ASI294MC @ 180 seconds for 15 minutes (L-eNhance)
Virgo    Type-3b(3a)    Mag+13.0    Size 478x281
      

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Abell-37 (planetary nebula) - 06/04/2022 - 8" SCT f6.3, Atlas Gem, ASI294MC @ 180 seconds for 15 minutes (L-eNhance)
Virgo    Type-2c    Mag+14.9    Size 43x40
      

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Abell-38 (planetary nebula) - 06/03/2022 - 8" SCT f6.3, Atlas Gem, ASI294MC @ 180 seconds for 3 minutes (L-eNhance)
Scorpius    Type-4(2)    Mag+15.7    Size 154x94
      

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Abell-39 (planetary nebula) - 09/05/2018 - 8" SCT f6.3, StellaCam-3 @ 4 minutes (O-III filter)
Hercules    Type-2c    Mag+13.79    Size 170x170
      

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Abell-40 (planetary nebula) - 06/24/2022 - 8" SCT f6.3, Atlas Gem, ASI294MC @ 180 seconds for 15 minutes (L-eNhance)
Ophiuchus    Type-2b    Mag+16.8    Size 30x27
      

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Abell-41 (planetary nebula) - 06/27/2022 - 8" SCT f6.3, Atlas Gem, ASI294MC @ 180 seconds for 15 minutes (L-eNhance)
Serpens    Type-3(2)    Mag+17.2    Size 16x7
      

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Abell-42 (planetary nebula) - 06/24/2022 - 8" SCT f6.3, Atlas Gem, ASI294MC @ 180 seconds for 15 minutes (L-eNhance)
Ophiuchus    Type-2b    Mag+17.8    Size 60x57
      

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Abell-43 (planetary nebula) - 09/05/2018 - 8" SCT f6.3, StellaCam-3 @ 3 minutes (O-III filter)
Ophiuchus    Type-2c    Mag+14.7    Size 80x74
      

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Abell-44 (planetary nebula) - 06/03/2022 - 8" SCT f6.3, Atlas Gem, ASI294MC @ 180 seconds for 15 minutes (L-eNhance)
Sagittarius    Type-2    Mag+17.4    Size 63x39
      

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Abell-45 (planetary nebula) - 06/28/2022 - 8" SCT f6.3, Atlas Gem, ASI294MC @ 180 seconds for 15 minutes (L-eNhance)
Scutum    Type-3b    Mag+12.8    Size 302x281
      

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Abell-46 (planetary nebula) - 06/28/2022 - 8" SCT f6.3, Atlas Gem, ASI294MC @ 180 seconds for 15 minutes (L-eNhance)
Lyra    Type-3b(2)    Mag+15.6    Size 63x60
      

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Abell-47 (planetary nebula) - 06/24/2022 - 8" SCT f6.3, Atlas Gem, ASI294MC @ 180 seconds for 9 minutes (L-eNhance)
Serpens    Type-4    Mag+20.9    Size 17x15
      

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Abell-48 (planetary nebula) - 06/28/2022 - 8" SCT f6.3, Atlas Gem, ASI294MC @ 180 seconds for 3 minutes (L-eNhance)
Aquila    Type-4    Mag+18    Size 43x37
      

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Abell-49 (planetary nebula) - 06/28/2022 - 8" SCT f6.3, Atlas Gem, ASI294MC @ 180 seconds for 15 minutes (L-eNhance)
Scutum    Type-2c    Mag+16.7    Size 35x33
      

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Abell-50
NGC6742 (planetary nebula) - 08/24/2014 - 8" SCT f5, StellaCam-3 @ 25 seconds
Draco    Type-2c    Mag+15.0    Size 31x30


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Abell-50 (planetary nebula) - 09/05/2018 - 8" SCT f6.3, StellaCam-3 @ 3 minutes (O-III filter)
Draco    Type-2c    Mag+15.0    Size 31x30
      

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Abell-51 (planetary nebula) - 06/03/2022 - 8" SCT f6.3, Atlas Gem, ASI294MC @ 180 seconds for 15 minutes (L-eNhance)
Sagittarius    Type-4    Mag+15.4    Size 64x58
      

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Abell-52 (planetary nebula) - 07/26/2022 - 8" SCT f6.3, Atlas Gem, ASI294MC @ 180 seconds for 15 minutes (L-eNhance)
Aquila    Type-3b    Mag+16.5    Size 37x34
      

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Abell-53 (planetary nebula) - 07/26/2022 - 8" SCT f6.3, Atlas Gem, ASI294MC @ 180 seconds for 15 minutes (L-eNhance)
Aquila    Type-4    Mag+16.9    Size 30x27
      

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Abell-54 (planetary nebula) - 09/10/2021 - 14" SCT f6.3, Fork Wedge, ASI294MC @ 180 seconds for 9 minutes (L-eNhance)
Vulpecula    Type-2b    Mag+17.1    Size 67x47
      

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Abell-55 (planetary nebula) - 09/23/2017 - 8" SCT f6.3, StellaCam-3 @ 3 minutes (O-III filter)
Aquila    Type-3    Mag+15.4    Size 47x32
      

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Abell-56 (planetary nebula) - 07/26/2022 - 8" SCT f6.3, Atlas Gem, ASI294MC @ 180 seconds for 15 minutes (L-eNhance)
Aquila    Type-4    Mag+15.5    Size 188x174
      

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Abell-57 (planetary nebula) - 09/10/2021 - 14" SCT f6.3, Fork Wedge, ASI294MC @ 60 seconds for 9 minutes (L-eNhance)
Vulpecula    Type-3b    Mag+14.7    Size 40x34
      

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Abell-58 (planetary nebula) - 07/29/2022 - 8" SCT f6.3, Atlas Gem, ASI294MC @ 180 seconds for 15 minutes (L-eNhance)
Aquila    Type-?    Mag+18.8    Size 44x37
      

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Abell-59 (planetary nebula) - 06/27/2022 - 8" SCT f6.3, Atlas Gem, ASI294MC @ 180 seconds for 6 minutes (L-eNhance)
Sagitta    Type-3b    Mag+17.2    Size 94x80
      

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Abell-60 (planetary nebula) - 06/03/2022 - 8" SCT f6.3, Atlas Gem, ASI294MC @ 180 seconds for 15 minutes (L-eNhance)
Sagittarius    Type-2b    Mag+15.7    Size 88x77
      

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Abell-61 (planetary nebula) - 06/28/2022 - 8" SCT f6.3, Atlas Gem, ASI294MC @ 180 seconds for 15 minutes (L-eNhance)
Cygnus    Type-2b    Mag+14.4    Size 201x201
      

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Abell-62 (planetary nebula) - 07/26/2022 - 8" SCT f6.3, Atlas Gem, ASI294MC @ 180 seconds for 15 minutes (L-eNhance)
Aquila    Type-2c    Mag+14.8    Size 161x151
      

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Abell-63 (planetary nebula) - 06/24/2022 - 8" SCT f6.3, Atlas Gem, ASI294MC @ 180 seconds for 15 minutes (L-eNhance)
Sagitta    Type-2    Mag+17.1    Size 40x27
      

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Abell-64 (planetary nebula) - 07/29/2022 - 8" SCT f6.3, Atlas Gem, ASI294MC @ 180 seconds for 15 minutes (L-eNhance)
Aquila    Type-3    Mag+15.3    Size 40x34
      

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Abell-65 (planetary nebula) - 06/03/2022 - 8" SCT f6.3, Atlas Gem, ASI294MC @ 180 seconds for 15 minutes (L-eNhance)
Sagittarius    Type-2a    Mag+15.2    Size 134x34
      

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Abell-66 (planetary nebula) - 06/03/2022 - 8" SCT f6.3, Atlas Gem, ASI294MC @ 180 seconds for 15 minutes (L-eNhance)
Sagittarius    Type-3b    Mag+14.9    Size 295x241
      

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Abell-67 (planetary nebula) - 07/29/2022 - 8" SCT f6.3, Atlas Gem, ASI294MC @ 180 seconds for 15 minutes (L-eNhance)
Aquila    Type-2b    Mag+16.0    Size 69x61
      

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Abell-68 (planetary nebula) - 09/10/2021 - 14" SCT f6.3, Fork Wedge, ASI294MC @ 60 seconds for 9 minutes (L-eNhance)
Vulpecula    Type-3    Mag+15.2    Size 40x37
      

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Abell-69 (planetary nebula) - 06/28/2022 - 8" SCT f6.3, Atlas Gem, ASI294MC @ 180 seconds for 15 minutes (L-eNhance)
Cygnus    Type-4    Mag+20.1    Size 25x22
      

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Abell-70 (planetary nebula) - 09/05/2018 - 8" SCT f6.3, StellaCam-3 @ 4 minutes (O-III filter)
Aquila    Type-4    Mag+14.3    Size 45x40
      

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Abell-71 (planetary nebula) - 06/28/2022 - 8" SCT f6.3, Atlas Gem, ASI294MC @ 180 seconds for 15 minutes (L-eNhance)
Cygnus    Type-3b    Mag+15.2    Size 165x150
      

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Abell-72 (planetary nebula) - 09/23/2017 - 8" SCT f6.3, StellaCam-3 @ 3 minutes (O-III filter)
Delphinus    Type-3b    Mag+14.6    Size 134x121
      

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Abell-73 (planetary nebula) - 07/25/2022 - 8" SCT f6.3, Atlas Gem, ASI294MC @ 180 seconds for 15 minutes (L-eNhance)
Cepheus    Type-4    Mag+17.4    Size 80x66
      

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Abell-74 (planetary nebula) - 09/10/2021 - 14" SCT f6.3, Fork Wedge, ASI294MC @ 120 seconds for 10 minutes (L-eNhance)
Vulpecula    Type-2    Mag+12.2    Size 871x791
      

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Abell-75 (planetary nebula) - 09/23/2017 - 8" SCT f6.3, StellaCam-3 @ 3 minutes (O-III filter)
Cepheus    Type-3b    Mag+17.0    Size 67x47
      

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Abell-75 (planetary nebula) - 10/20/2017 - 8" SCT f6.3, StellaCam-3 @ 3 minutes (no filter)
Cepheus    Type-3b    Mag+17.0    Size 67x47
      

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Abell-77 (planetary nebula) - 07/25/2022 - 8" SCT f6.3, Atlas Gem, ASI294MC @ 180 seconds for 15 minutes (L-eNhance)
Cepheus    Type-3a(3)    Mag+16.4    Size 67x50
      

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Abell-78 (planetary nebula) - 09/23/2017 - 8" SCT f6.3, StellaCam-3 @ 3 minutes (O-III filter)
Cygnus    Type-4    Mag+16.0    Size 113x88
      

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Abell-79 (planetary nebula) - 09/23/2017 - 8" SCT f6.3, StellaCam-3 @ 3 minutes (O-III filter)
Lacerta    Type-4(3)    Mag+15.8    Size 99x99
      

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Abell-80 (planetary nebula) - 06/28/2022 - 8" SCT f6.3, Atlas Gem, ASI294MC @ 180 seconds for 15 minutes (L-eNhance)
Cygnus    Type-4    Mag+15.2    Size 161x114
      

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Abell-81 (planetary nebula) - 09/23/2017 - 8" SCT f6.3, StellaCam-3 @ 3 minutes (O-III filter)
Cepheus    Type-4    Mag+14.8    Size 34x31
      

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Abell-81 (planetary nebula) - 10/20/2017 - 8" SCT f6.3, StellaCam-3 @ 3 minutes (no filter)
Cepheus    Type-4    Mag+14.8    Size 34x31
      

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Abell-82 (planetary nebula) - 09/23/2017 - 8" SCT f6.3, StellaCam-3 @ 3 minutes (O-III filter)
Cassiopeia    Type-3b    Mag+15.2    Size 94x94
      

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Abell-83 (planetary nebula) - 06/27/2022 - 8" SCT f6.3, Atlas Gem, ASI294MC @ 180 seconds for 12 minutes (L-eNhance)
Cassiopeia    Type-2c    Mag+17.6    Size 42x37
      

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Abell-84 (planetary nebula) - 09/23/2017 - 8" SCT f6.3, StellaCam-3 @ 3 minutes (O-III filter)
Cassiopeia    Type-3b    Mag+14.4    Size 147x114
      

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Abell-85 (supernova remnant) - 07/25/2022 - 8" SCT f6.3, Atlas Gem, ASI294MC @ 180 seconds for 15 minutes (L-eNhance)
Cassiopeia    Type-SNR    Mag+?    Size 1800x1200
      

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Abell-86 (planetary nebula) - 07/25/2022 - 8" SCT f6.3, Atlas Gem, ASI294MC @ 180 seconds for 15 minutes (L-eNhance)
Cepheus    Type-2c    Mag+16.7    Size 70x70
      

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Hope you enjoyed the visit. Come again soon!
Larry McHenry,   Pittsburgh, PA. USA

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