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Zlender Images of Comet Hale-Bopp

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zle4_s.gif14K zle5_s.gif17K zle6_s.gif3K
Observer: Udo Zlender
Location: Bonn, Germany
Date: March 10, 1997 04:25-04:37 UT

This sequence of images shows on the one side more detail of the inner parts of the coma near the nucleus when exptime is short, and growing tails with increasing exposure time. A few stars remain visible in all three images.

For all images:

Camera: OES-LCCD14 2x2 pixel binning mode , 12 bits AD-resolution
Lens: tele photo 200mm F/4 Nikkor
Tracking: automatic on Losmandy G11
Outside temp: 3 deg Celsius
Filter: None
CCD-temp: -4 deg Celsius
Orientation: North is up
Humidity: high
Notes: Urban environment

First image: 
Time of observation: 04:24:58 UT
Exp. time: 30.0 sec 
Processing: dark subtracted, flat fielded, log scaled

Second image:
Time of observation: 04:30:23 UT
Exp. time: 10.0 sec 
Processing: dark subtracted, flat fielded, log scaled

Third image:
Time of observation: 04:37:04 UT
Exp. time: 1.0 sec 
Processing: dark subtracted, flat fielded, log scaled

Udo Zlender
E-mail: zlender@viswiz.gmd.de


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