M57 - The Ring Nebula
Luminance info:
22:34 EDT June 18, 2003.
Starlight Express SXV-H9 on 3.5" Questar.
L=60min (in 18 second increments) guided with PC-164C.
Color taken from an earlier LRGB image...
22:23 EDT August 29, 2001 and 22:13 EDT July 8, 2002.
Starlight Express MX-916 on 3.5" Questar.
L=8min (in 12 second increments) and 60 min (in 6 min self-guided
increments).
R=4min, G=4min, B=4min (in 12 second increments).
