Closeup of Abell 21 (The Medusa Nebula) in SHO (Bruce Donzanti)

Celestial hemisphere: Northern · Constellation: Gemini (Gem) · Contains: PK205+14.1 · Sh2-274

Image of the day 03/13/2023

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Closeup of Abell 21 (The Medusa Nebula) in SHO

Image of the day 03/13/2023

Powered byPixInsight

Closeup of Abell 21 (The Medusa Nebula) in SHO

Abell 21 (Sh2-274), informally known as the Medusa Nebula, is not the most exciting object to image, but it does have some interesting features. I tried to get a nice closeup but several nights of high thin clouds fought me on this effort. So, unfortunately, it did not come out as detailed and clean as I had hoped due to poor transparency. I minimized the stars to see if that would remove some distraction while looking at the nebulosity. This planetary nebula, reclassified as such in the 1970s, is so large, its surface brightness is very low, with surface magnitudes reported between +15.99 and +25. The central star of the planetary nebula is a PG 1159 star.

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Abell Planetary Nebula
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Status	Advanced success
Started	...
Astrometry.net job	7332759
PixInsight job	TFYMLR5H1T2QPUFE7CLO7AV4Z4NUVUSR
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	07h28m53s.717
RA (top/left)	07h29m46s.642
RA (top/right)	07h28m24s.363
RA (bottom/right)	07h28m00s.772
RA (bottom/left)	07h29m23s.280

Dec (center)	+13°16′29″.91
Dec (top/left)	+13°15′55″.67
Dec (top/right)	+13°27′12″.84
Dec (bottom/right)	+13°17′02″.59
Dec (bottom/left)	+13°05′44″.85

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Image of the day 03/13/2023

Closeup of Abell 21 (The Medusa Nebula) in SHO

Image of the day 03/13/2023

Closeup of Abell 21 (The Medusa Nebula) in SHO

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Image of the day 03/13/2023

Closeup of Abell 21 (The Medusa Nebula) in SHO

Image of the day 03/13/2023

Closeup of Abell 21 (The Medusa Nebula) in SHO

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