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NGC 7822: Emission Nebula in Cepheus

RA = 0 hrs 1 min; Dec = +68 deg 32 min 37 sec.

Date & Site:

Imaged on 7/20/2012; Palomar Mountain, CA

Conditions: mild wind; 70 degrees; average seeing


Telescope: Takahashi FSQ106 at F5 (fl= 530mm)
Mount: Losmandy G-11 with Gemini
Camera: ST-10XME; CFW10 with Astrodon 3 nm Narrowband Filters; externally guided


Exposures: 120 min each for Ha, SII and OIII (in 15 min subs)

Hydrogen, ionized sulfer and doubly ionized oxygen color-mapped using the Hubble palette (R=SII, G=Ha, B=OIII).

Click here to view cropped Ha image

FOV =96 x 65 arc minutes

The complex encompasses the emission region designated Sharpless 171, and the young cluster of stars named Berkeley 59. The complex is believed to be some 800-1000 pc distant,with the younger components aged no more than a few million yearsThe complex also includes one of the hottest stars discovered within 1 kpc of the Sun, an binary star system consisting of an O5V that exhibits a surface temperature of nearly 100000 times that of the Sun. The star is one of the primary sources illuminating the nebula and shaping the complex's pillars of creation-type formations, Source: http://en.wikipedia.org/wiki/NGC_7822

3000 light years distant

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