Michael Purcell's Astrophotography

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M103

M103

This is the first image of an Open Cluster that I published on my Web site. Although some of my earliest experiments with the ST-6 included Open Clusters, I quickly stopped imaging them simply because almost all of these objects are too large for the CCD chip in the ST6 and ST-7. Recently, I have gone back to my lists of Messier and NGC objects, looking for Open Clusters that are small enough to be reasonable targets for imaging.

M103 is the last object in Messier's original catalog. It is about 8000 LY away, contains at least 40 stars, with a diameter of 15 LY. The three bright stars in the center are blue giants of spectral type B3.

I took this picture from my driveway.


Constellation Cassiopeia
Right Asc (hh:mm:ss) 1:33:12
Declination(deg:sec) 60:42
Magnitude 7
Size (ArcMin) 6
Tirion SkyAtlas 2000 #1
Uranometria 2000 #16

CCD Camera Parameters

ST-7 Compressed Image
File_version = 3
Data_version = 1
Exposure = 5 minutes
Focal_length = 63.000
Aperture = 65.9000
Response_factor = 2000.000
Note = Image taken 09/07/97 at 01:24:20
Background = 287
Range = 176
Height = 510
Width = 765
Date = 09/07/97
Time = 01:24:20
Exposure_state = 356
Temperature = 0.19 C
Number_exposures = 1
Each_exposure = 5 minutes
History = dFEK
Observer = Michael Purcell
X_pixel_size = 0.0090
Y_pixel_size = 0.0090
Pedestal = 0
E_gain = 2.30
User_1 = CCDOPS for DOS Version 3.6B2
Filter = None
Readout_mode = 0
Track_time = 2 seconds
Sat_level = 65535

This page last updated on December 27, 1997 Contact Michael Purcell

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