Michael Purcell's Astrophotography

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M12

I took this picture from my driveway.

Constellation Ophiuchus
Right Asc (hh:mm:ss) 16:47:12
Declination(deg:sec) -1:57
Magnitude 6.6
Size (ArcMin) 14.5
Tirion SkyAtlas 2000 #15
Uranometria 2000 #246

CCD Camera Parameters

ST-6 Compressed Image
File_version = 3
Data_version = 1
Exposure = 5 minutes
Focal_length = 80.000
Aperture = 40.200
Response_factor = 1000.000
Note = M12, Globular cluster in Ophiuchus
Background = 432
Range = 3312
Height = 236
Width = 366
Date = 07/12/93
Time = 22:50:00
Exposure_state = 228
Temperature = -30.07 C
Number_exposures = 15
Each_exposure = 20 seconds
History = RF
Observer = Mike Purcell
X_pixel_size = 0.0230
Y_pixel_size = 0.0270
Pedestal = 4381
E_gain = 6.70

This page last updated on June 14, 1998 Contact Michael Purcell

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