astroimages
Darin E. Fields' Astrophotography Pages
 

M101: Spiral Galaxy in Ursa Major

Right Ascension 14 : 03.2 (h:m)
Declination +54 : 21 (deg:m)
Distance 27000 (kly)
Visual Brightness 7.9 (mag)
Apparent Dimension 22.0 (arc min)
More information on M101

Exposure: A 25 minute composite stack of 5 180 second exposures (15 minutes) and one 600 second (10 minute) exposure.
Guiding: ST-4 on the Meade 90mm @ f/11
Telescope: 80mm ST-80 f/5
Camera: ST-237 cooled at -18c
Processing: Maxim/DL and Photoshop
Date: 7/26/01
m101-5: