Abell 77 / Sh2-128 (Gary Imm)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: LBN 443 · PK097+03.1 · Sh2-128

Abell 77 / Sh2-128

This small HII region is located 30,000 light years away in the constellation of Cepheus at a declination of +56 degrees. It spans 1.4 arc-minutes in our apparent view, which corresponds to a diameter of 12 light years.

Despite having the designation of Abell 77, this object is not a PN. It is too big for a PN, which are typically 1-2 light years in diameter. Also, it doesn’t look like a PN. Edges of PN are rounded, consistent with how they are formed.

This object reminds me of other similar HII regions such as Sh2-211, which is a similar diameter and distance away from us.

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The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

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Status	Advanced success
Started	...
Astrometry.net job	5126895
PixInsight job	KZUG1XATC7J2YCNASADJNOIXSPDHD9LC
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	21h32m10s.590
RA (top/left)	21h32m54s.530
RA (top/right)	21h31m26s.830
RA (bottom/right)	21h31m26s.406
RA (bottom/left)	21h32m53s.957

Dec (center)	+55°52′41″.61
Dec (top/left)	+55°57′11″.40
Dec (top/right)	+55°57′10″.59
Dec (bottom/right)	+55°48′12″.22
Dec (bottom/left)	+55°48′11″.69

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Abell 77 / Sh2-128

Abell 77 / Sh2-128

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Abell 77 / Sh2-128

Abell 77 / Sh2-128

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