Sh2 205 H-alpha RGB (Jerry Yesavage)

Celestial hemisphere: Northern · Constellation: Camelopardalis (Cam) · Contains: Sh2-205

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Sh2 205 H-alpha RGB

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Sh2 205 H-alpha RGB

Both Sharpless and Avedisova list the O9 class multiple star HD 24431 as the main ionising star for the large diffuse Sh 2-205, sometimes called the Peanut nebula [I think this refers to the small smudge in the center... about 10% of the image, where the brightest star resides... seen best in HA]. Avedisova also lists two cooler B-class ionising stars.

A recent series of papers divides the nebula into three distinct regions (although at similar distances), with the B-stars ionising a different region than HD 24431. They also suggest that CY Cam (HD 24094) may be an O8.5 or O9 star instead of the usually suggested much cooler B8 and may be the main ionising star of LBN 148.11-0.45 (LBN 696) in this direction.

A 2011 paper states that CY Cam is a B1 III giant.

Like Sh 2-202, this nebula lies at the edge of the Cam OB1 association.

From: http://galaxymap.org/cat/list/sharpless/201

Original
B
Final
C

B

Description: Original HA destarred

Uploaded: ...

C

Description: Final with a bit of noise reduction

Uploaded: ...

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Status	Advanced success
Started	...
Astrometry.net job	3148170
PixInsight job	LNVQPH51QISSSA7K650PTE05NWUIVGUD
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	03h56m11s.59
RA (top/left)	03h59m48s.11
RA (top/right)	03h52m34s.92
RA (bottom/right)	03h52m39s.29
RA (bottom/left)	03h59m44s.24

Dec (center)	+53°11′41″.9
Dec (top/left)	+53°36′03″.3
Dec (top/right)	+53°36′01″.5
Dec (bottom/right)	+52°46′56″.9
Dec (bottom/left)	+52°46′58″.7

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Sh2 205 H-alpha RGB

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