Spiral Galaxy M101 (NGC 5457), type Sc, in Ursa Major

Right Ascension = 14h 03m 0.2s (h:m:s), Declination = +54d 21' 00" (deg:m:s)
Magnitude = 7.9, Size = 22 (arc minutes), Distance = 27000 (kly)

Spiral Galaxy M101 (NGC 5457), type Sc, in Ursa Major.
This image is cropped from 800 x 600.

Optics: Takahashi FS-102 Refractor
Adapter: none
Date: 04/28/2006 Time: 05:34:00 to 06:40:00 UTC
Exposure: 300 seconds each Red = Green = 4 x 5 minutes each, Blue = 5 x 5 minutes each
Filter: SBIG CFW8-A, Clear, R, G, B Custom Scientific
Resolution: 800 x 600, Binned 2x2)
Guiding: SBIG ST-2000XM with internal TC-237 guider and A0-7 Adaptive Optics
Acquisition: SBIG ST-2000XM camera
Mount: Losmandy G-11 with Gemini GOTO
Software: SBIG CCDOPS ver 5.40B6NT, dark subtracted, flated and images added.
NOTES: Camera cooled to -20c below ambient temperature. 2x2 binning with this setup reduces the image in half and resulted in a 3.7 arcsecond per pixel image. Total image field of view (fov) is 25w x 218.7h arcminutes.

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© , 2006
Last edited:9/4/2006, by Don Lewis, Wye Mountain Observatory