astroimages
Darin E. Fields' Astrophotography Pages
 

M12: Globular Cluster in Ophiuchus

Right Ascension 16 : 47.2 (h:m)
Declination -01 : 57 (deg:m)
Distance 16.0 (kly)
Visual Brightness 6.7 (mag)
Apparent Dimension 14.5 (arc min)
More information in M12

Exposure: 20 minutes exposure (10x 120sec.)
Camera: ST-237 cooled @-28c
Guiding: ST-4 on St-80 @ f/10
Telescope: 8" f/4 Newtonian
Mount: Losmandy G-11
Acquisition and Processing: Maxim/DL and Photoshop 6.0
Date:5-18-02
m12-lum-1: