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, 2011From
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]