Michael Purcell's Astrophotography

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NGC 4945

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

This is a mosaic of three overlapping 20 minute images. I created a master dark frame from three separate 20 minute dark frames. Image processing and assembly was done with Mira A/P.

I took this picture at Grove Creek Observatory.

Constellation	Centaurus
Right Asc (hh:mm:ss)	13:05:24
Declination(deg:sec)	-49:28:00
Magnitude	9.0
Size (ArcMin)	23x6
Tirion SkyAtlas 2000	#21
Uranometria 2000	#402

CCD Camera Parameters

ST-7E Compressed Image
File_version = 3
Data_version = 1
Exposure =20 minutes
Focal_length = 98.000
Aperture = 141.3700
Response_factor = 2000.000
Note = Image taken 03/30/00 at 23:15:14
Background = 438
Range = 1865
Height = 510
Width = 765
Date = 03/30/00
Time = 23:15:14
Exposure_state = 356
Temperature = -14.81 C
Number_exposures = 1
Each_exposure = 20 minutes
History = d
Observer = Michael Purcell at Grove Creek Observatory
X_pixel_size = 0.0090
Y_pixel_size = 0.0090
Pedestal = 0
E_gain = 2.30
User_1 = CCDOPS for DOS Version 3.84
User_4 = Y2KYear = 2000
Filter = None
Readout_mode = 0
Track_time = 100
Sat_level = 65535

This page last updated on January 6, 2001 Contact Michael Purcell