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Sh2-232, SH2-235, SH2-231 and SH2-233 in Auriga

RA = 5 hrs 43 min; Dec = 36 deg 12 min

Date & Site:

Imaged on12/31/2012; Runningman Observatory, Carlsbad

Conditions: calm; 46 degrees; very good seeing


Telescope: Takahashi FSQ106 Refractor (@ f/5 540 mm fl)
Mount: Losmandy G-11 with Gemini
Camera: ST-10XME; CFW10; externally guided


Exposures: 22 15 min exposures in hydrogen alpha (4.5 hrs) and 6 5-min exposures each in RGB for a total of 6 hours

Imaged over three nights (2-3 hrs each night).

FOV = 96 x 65 arc minutes

This large complex is composed of four HII regions in the direction of the northern Auriga OB1 association. While seemingly separated in appearance, members of the Sh2-232 complex all belong to a single giant molecular cloud. The constellation Auriga is located in the "Galactic Anticenter" a region that hosts a number of massive molecular cloud complexes. The dominant region of star formation is centered around the Sh2-232 complex.

5,870 ly distant

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