NGC 7822 widefield (Andreas Zeinert)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: 10 Cas · 13 Cas · 16 Cas · HD1009 · HD108 · HD134 · HD14 · HD1426 · HD1456 · HD1559 · HD1624 · HD1625 · HD163 · HD1658 · HD1695 · HD1769 · HD2110 · HD220781 · HD220841 · HD220974 · HD221862 · HD221946 · HD222405 · HD222471 · HD222552 · HD222568 · HD222629 · HD222958 · HD223128 · HD223265 · And 73 more.

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NGC 7822 widefield

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NGC 7822 widefield

An overview of an often imaged nebula complex. NGC 7822 is a young star forming complex in Cepheus. It encompasses a huge the emission region designated Sharpless 171.The estimated distance is about 3000 light years.
I decided to make a widefield for the "poor" : Samyang 135 mm lens opened at f/2.4 with a second hand defiltered Canon 77D and the bi-band LEnhance filter from Optolong, on a small travel ioptron sky guider mount. This ia a quite faint complex (except for the core of NGC 7822), 2h15h of exposure are not really enough for an uncooled OSC.
Wait a minute : "often imaged nebula" but is it also well known? Did you know that NGC7822 is mainly illuminated by one very hot binary OV5 star named BF+66 1673 ? In version B you can discover the position of this binary system, emitting 100000 more power than our Sun. On the image it looks so tiny and insignificant. Always be careful of appearances...

Final
Original
B

B

Description: Location of the binary star system BD+66 1673

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Status	Advanced success
Started	...
Astrometry.net job	8341273
PixInsight job	VGO2VAMKTJ06R58NW57H97J4Q5C9K411
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	00h02m21s.8
RA (top/left)	23h11m47s.3
RA (top/right)	23h51m53s.2
RA (bottom/right)	00h40m28s.6
RA (bottom/left)	00h18m33s.10

Dec (center)	+67°22′18″
Dec (top/left)	+70°20′12″
Dec (top/right)	+62°03′51″
Dec (bottom/right)	+63°38′38″
Dec (bottom/left)	+72°36′18″

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NGC 7822 widefield

NGC 7822 widefield

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NGC 7822 widefield

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