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Technical card

Imaging telescope or lens: Astro-Tech AT10RCCF

Imaging camera: SBIG ST-8300C

Mount: Orion Atlas EQ-G

Guiding telescope or lens: Astro-Tech AT10RCCF

Guiding camera: The Imaging Source DMK 21AF04

Software: PixInsightphotoshopNebulosityMicroprojects Equinox Image

Filter: Orion SkyGlow 2" Imaging Filter

Accessory: Orion Deluxe off-axis guider

Resolution: 1212x896

Dates: Sept. 18, 2012Sept. 19, 2012Sept. 20, 2012Sept. 22, 2012

Frames: Orion SkyGlow 2" Imaging Filter: 41x900" -20C bin 1x1

Integration: 10.2 hours

Avg. Moon age: 4.03 days

Avg. Moon phase: 19.12%

Bortle Dark-Sky Scale: 5.00 job: 89015

RA center: 339.007 degrees

DEC center: 33.963 degrees

Pixel scale: 1.107 arcsec/pixel

Orientation: 87.896 degrees

Field radius: 0.232 degrees


The redder galaxies are in the processes of merging. Notice the faint tail to the right of the blue galaxy? That is a streamer of stars thrown out by the gravitational interaction of the redder galaxies.

The bluer galaxy is a chance alignment, and is 10 times closer.





Sky plot

Sky plot


Stephan's Quintet, stevebryson