Michael Purcell's Astrophotography

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M13

M13

(Click on the picture above to go to the main image.)

M13 is a is the largest globular cluster in the Northern sky. Note that this image from my driveway is only 17 seconds in duration.

Constellation Hercules
Right Asc (hh:mm:ss) 16:41:42
Declination(deg:sec) 36:28
Magnitude 5.9
Size (ArcMin) 16.6
Tirion SkyAtlas 2000 #8
Uranometria 2000 #114

CCD Camera Parameters

ST-7 Compressed Image
File_version = 3
Data_version = 1
Exposure = 17 seconds
Focal_length = 63.000
Aperture = 65.9400
Response_factor = 300.000
Note = Picture taken 09/09/95 at 20:26:16
Background = 113
Range = 158
Height = 510
Width = 765
Date = 09/09/95
Time = 20:26:16
Exposure_state = 37
Temperature = -9.79 C
Number_exposures = 1
Each_exposure = 17 seconds
History = D
Observer = Michael Purcell
X_pixel_size = 0.0090
Y_pixel_size = 0.0090
Pedestal = 0
E_gain = 3.00
User_1 = CCDOPS for DOS Version 2.05
Filter = None
Readout_mode = 0

This page last updated on August 24, 1996 Contact Michael Purcell

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