Uploaded 1-Sep-11
Taken 4-Sep-11
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Dimensions1024 x 768
Original file size308 KB
Image typeJPEG
Color spaceUncalibrated
NGC7331 & Stephen's Quintet

NGC7331 & Stephen's Quintet

Date: 8/31/2011
Target: NGC 7331 & Stephen's Quintet
Telescope:
Orion 8" f/4.9
Multi-Purpose Coma Corrector
JMI EV-1n Focuser
Resurfaced: Spectrum Coatings Max "R" (EAL)
Camera: Canon 40D (modified, cooled to 36F)
Filter: IDAS LPS
Exposures: 26x300s (2.2h) @ ISO1600
Framing: North is Up, 65% crop, Center(RA/Dec): (339.103, 34.209), FOV: 0.512 deg
Location: Mocksville, NC
Seeing: 4/5
Transparency: 4/5
Ambient Temp: 70F
Camera Temp: 44
Dark Noise (StdDev): 385
Start Time: 10:15PM
End Time: 12:00AM
Captured with Nebulosity, stacked using DeepSkyStacker, processed in Photoshop.

Anacortes Astronomy Picture of the Day, September 6, 2011

From wikipedia:

NGC 7331 (also known as Caldwell 30) is a spiral galaxy about 40 megalight-years (12 Mpc) away in the constellation Pegasus. It was discovered by William Herschel in 1784.[3] NGC 7331 is the brightest member of the NGC 7331 Group of galaxies.
The galaxy is similar in size and structure to the galaxy we inhabit, and is often referred to as "the Milky Way's twin",[4] although recent discoveries regarding the structure of the Milky Way may call this similarity into doubt.[5]