astroimages
Darin E. Fields' Astrophotography Pages
 

NGC 4631: The Whale Galaxy in Canes Venatici

Right Ascension: 12 : 42.1 (hours : minutes)
Declination: +32 : 32 (degrees : minutes)
Apparent Magnitude: 9.3
Apparent Diameter: 15.1 (arc minutes)
More information in NGC 4631

Exposure: 70 minute LRGB exposure: L=40 minutes (20 x 120sec.), R=10 minutes (5x 120 sec.) 2xbinned, G=10 minutes (5x 120 sec.) 2xbinned, B=10 minutes (5x 120 sec.) 2xbinned.
Camera: ST-237 cooled @ -15c
Guiding: ST-4 on ST-80 @ f/10
Telescope: 8" f/4 Newtonian
Mount: Losmandy G-11
Processing: Maxim/DL, Photoshop 6.0
Date: 04-16-02
ngc4631-lrgb-1a: