Abell 85 (Eddie Bagwell)

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas) · Contains: 9 Cas · HD224892 · HD225160 · LBN 576 · The star 9 Cas

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Abell 85

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Abell 85

CTB 1
Abell 85
LBN 576
Popped Ballon Nebula

CTB1 is a nearby supernova remnant (SNR) in the Constellation Cassiopeia with an apparent diameter of about a half a degree. Upon early discovery, CTB1 was thought to be a planetary nebula, so George Abell included it in his catalog of planetary nebulae as Abell 85. Further research showed that CTB1 is, in fact, a supernova remnant.

The deep red color of the SNR comes from light emitted by energized Hydrogen (Ha), but CTB1 also has an area shining in blue/green light from energized Oxygen (OIII) atoms. The surrounding Ha light has been shown to be related to CTB1 as well.

Notes:

- Abell 85 is extremely faint and needed extra Ha subs to finish with just a splash of O3 on the west edge.
- Minimum of 5-minute Ha subs are needed to bring out the nebulosity, even longer would be preferred.
- I should have used the .8x R/F on this one but didn't as I just barely got it framed with a minimal crop.

Thanks, Eddie

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Status	Advanced success
Started	...
Astrometry.net job	6448851
PixInsight job	ZELN53CHIK95MYW58G9Z0W2P40E9F2NR
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	23h59m35s.670
RA (top/left)	23h52m55s.644
RA (top/right)	00h02m38s.146
RA (bottom/right)	00h06m17s.383
RA (bottom/left)	23h56m23s.427

Dec (center)	+62°28′00″.49
Dec (top/left)	+62°21′38″.24
Dec (top/right)	+61°46′29″.91
Dec (bottom/right)	+62°33′11″.48
Dec (bottom/left)	+63°09′14″.72

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