Michael Purcell's Astrophotography

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M84

M84

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

I could not find a usable guide star for auto-guiding or track_and_accumulate, so I took six separate images of 20 seconds each and combined them.

I took this picture at Grove Creek Observatory.

Constellation Virgo
Right Asc (hh:mm:ss) 12:25:10
Declination(deg:sec) 12:52
Magnitude 9.98
Size (ArcMin) 6.4 x 5.6
Uranometria 2000 #193

CCD Camera Parameters

ST-7E Compressed Image
File_version = 3
Data_version = 1
Exposure = 2 minutes
Focal_length = 98.000
Aperture = 141.3700
Response_factor = 2000.000
Note = Image taken 04/07/00 at 22:00:09
Background = 122
Range = 64
Height = 510
Width = 765
Date = 04/07/00
Time = 22:00:09
Exposure_state = 356
Temperature = -14.81
Number_exposures = 6
Each_exposure = 20 seconds
History = 0
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
Filter = None
Readout_mode = 0
Track_time = 0
Sat_level = 65535

This page last updated on November 8, 2002 Contact Michael Purcell

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