astroimages
Darin E. Fields' Astrophotography Pages
 

M100: Spiral Galaxy in Coma Berenices

Right Ascension 12 : 22.9 (h:m)
Declination +15 : 49 (deg:m)
Distance 60000 (kly)
Visual Brightness 9.3 (mag)
Apparent Dimension 7x6 (arc min)
More information on M100

Exposure: 88 minute LRGB: L=40 minutes (20x 120 sec.), R=16 min. (4 x 240 sec.) 2x binned, G=16 min. (4 x 240 sec.) 2x binned, B=16 min. (4 x 240 sec.) 2x binned.
Camera: ST-237 cooled @ -25c
Guiding: ST-4 on 80mm @ f/10
Telescope: 8" f/4 Newtonian
Mount: Losmandy G-11
Acquisition and Processing: Maxim/DL and Photoshop 6.0
Date: 4/10/02
m100-lrgb-1: