Michael Purcell's Astrophotography

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NGC 891
Caldwell 23

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

NGC891 is a beautiful edge-on spiral galaxy with pronounced dust lanes. This image is a recent ugrade using the ST-7. For comparison, check out my previous ST-6 image.

I took this picture from my driveway.

Constellation	Andromeda
Right Asc (hh:mm:ss)	2:22:36
Declination(deg:sec)	42:21
Magnitude	10
Size (ArcMin)	13.5
Tirion SkyAtlas 2000	#4
Uranometria 2000	#62

CCD Camera Parameters

ST-7 Compressed Image
File_version = 3
Data_version = 1
Exposure = 15 minutes
Focal_length = 63.000
Aperture = 65.9400
Response_factor = 300.000
Note = Picture taken 11/12/95 at 00:16:53
Background = 700
Range = 211
Height = 510
Width = 510
Date = 11/12/95
Time = 00:16:53
Exposure_state = 37
Temperature = -29.72 C
Number_exposures = 1
Each_exposure = 15 minutes
History = DFcKC
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

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