Sh2 138 139 and PN Pk105 Hydrogen Alpha (Jerry Yesavage)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: PK105+00.1 · Sh2-138 · Sh2-139

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Sh2 138 139 and PN Pk105 Hydrogen Alpha

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Sh2 138 139 and PN Pk105 Hydrogen Alpha

In working down my list of Sh2 objects I images 138 and 139 separately, then realized they were close, so I formed this crop which covers them and combines the exposures.

I just used the HA as the detail and the PN is lost in the color.

Galaxymap info (138):

Embedded in this compact HII region is a large star cluster resembling the Orion Trapezium cluster: it is centrally peaked around several massive stars, and is dense - more than 550 stars at its centre. [No wonder it is very bright]

Galaxymap info (139):

According to Avedisova, Sh 2-139 is ionised by two giant stars: LS III +57 38 (O9 III) and LS III +58 37 (B2 III). SIMBAD disagrees with the spectral classification of LS III +57 38, however, and gives it a much cooler spectral class of B5.

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Status	Advanced success
Started	...
Astrometry.net job	3834874
PixInsight job	ARWJNI5U8W8XO7UEW54LKFQQ65MGGLGS
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	22h34m01s.19
RA (top/left)	22h36m59s.99
RA (top/right)	22h31m03s.37
RA (bottom/right)	22h31m05s.61
RA (bottom/left)	22h36m56s.21

Dec (center)	+58°20′51″.10
Dec (top/left)	+58°38′11″.5
Dec (top/right)	+58°38′21″.0
Dec (bottom/right)	+58°03′15″.2
Dec (bottom/left)	+58°03′07″.0

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Sh2 138 139 and PN Pk105 Hydrogen Alpha

Sh2 138 139 and PN Pk105 Hydrogen Alpha

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Sh2 138 139 and PN Pk105 Hydrogen Alpha

Sh2 138 139 and PN Pk105 Hydrogen Alpha

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