astroimages
Darin E. Fields' Astrophotography Pages
 

M20: Diffuse Nebula in Sagittarius

Right Ascension 18 : 02.6 (h:m)
Declination -23 : 02 (deg:m)
Distance 5.2 (kly)
Visual Brightness 9.0 (mag)
Apparent Dimension 28.0 (arc min)
More information on M20

Exposure: A 46 minute LRGB exposure: L=10 minutes (5 x 120 sec.), R=12 minutes (3 x 240 sec.), G=12 minutes (3 x 240 sec.), B=12 minutes (3 x 240 sec.)
Guiding: ST-4 on the ST-80
Telescope: 8" f/4 Newtonian
Camera:ST-237 cooled @ -18
Processing:CCDOPS, Photoshop
Date: 8/8/02
m20-lrgb-2:
Exposure: An 11 minute LRGB exposure. L=2 minutes, R=3 minutes, G=3 minutes, B=3 minutes
Guiding: ST-4 on the ST-80
Telescope: 8" f/4 Newtonian
Camera:ST-237 cooled @ -18
Processing:CCDOPS, Photoshop
Date: 7/12/01
m20-1: