Sh2-274 / Abell 21 The Medusa (or Santa?) nebula in wide field (Göran Nilsson)

Celestial hemisphere: Northern · Constellation: Gemini (Gem) · Contains: 1 CMi · 6 CMi · NGC 2395 · PK205+14.1 · Sh2-274 · The star 1CMi · The star 6CMi

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Sh2-274 / Abell 21 The Medusa (or Santa?) nebula in wide field

Revision title: Reprocessed for better star field and sharper nebula

Powered byPixInsight

Sh2-274 / Abell 21 The Medusa (or Santa?) nebula in wide field

Revision title: Reprocessed for better star field and sharper nebula

I have not seen many wide field images of Sh2-274 and the surrounding nebulosity, so I thought is could be an interesting target for my dual-RASA rig. No moon up most of the night, so no moon light and gradients to worry about. Still, I decided to go for a NBZ-filtered image (Ha and Oiii) rather than RGB to get more punch in the Ha and Oiii.

Sh2-274 is known as the Medusa Nebula, but to me, especially with all the Ha shining in this image, it reminds me of Santa Claus. It was imaged exactly one month after Christmas so fortunately for us he has 11 month to return!

Version A shows the wide field and version B is a close up since the image shows quite a lot of detail for being 400 mm focal length.

Original
B
C
Final
D

B

Description: A crop to show the nebula more close up

Uploaded: ...

C

Title: Reprocessed for better star field and sharper nebula

Uploaded: ...

D

Description: Total reprocess using the new XT tools

Uploaded: ...

Cooled Color Cams
Sharpless2 Objects
Celestron RASA
Abell Planetary Nebula
The OSC Club (One Shot Camera)
CMOS Imagers
ZWO ASI 2600MC PRO

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Status	Advanced success
Started	...
Astrometry.net job	5442995
PixInsight job	Q5B92CUQLWL3YG6ZOTEE74NRHI49PW6R
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	07h27m28s.20
RA (top/left)	07h32m49s.80
RA (top/right)	07h31m01s.20
RA (bottom/right)	07h22m03s.75
RA (bottom/left)	07h23m58s.73

Dec (center)	+13°06′33″.9
Dec (top/left)	+11°45′09″.8
Dec (top/right)	+14°46′52″.1
Dec (bottom/right)	+14°27′45″.3
Dec (bottom/left)	+11°26′09″.0

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Sh2-274 / Abell 21 The Medusa (or Santa?) nebula in wide field

Revision title: Reprocessed for better star field and sharper nebula

Sh2-274 / Abell 21 The Medusa (or Santa?) nebula in wide field

Revision title: Reprocessed for better star field and sharper nebula

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Sh2-274 / Abell 21 The Medusa (or Santa?) nebula in wide field

Revision title: Reprocessed for better star field and sharper nebula

Sh2-274 / Abell 21 The Medusa (or Santa?) nebula in wide field

Revision title: Reprocessed for better star field and sharper nebula

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Description

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C

D

Sky plot

Histogram

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