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Sposetti Images of Comet Hale-Bopp

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spo3_s.jpg71K spo4_s.jpg92K
Observer: Stefano Sposetti
Location: Monte Generoso, Ticino, Switzerland
Date: April 3, 1997 18:30 UT

The pictures were made at the prime focus of a 62cm f:8 Ritchey-Cr=E9tien-telescope owned by the Ferrovia Monte Generoso SA. The CCD is a Hi-SIS33, unfiltered. The black and white picture is a result of a median of five-2 seconds pictures. The image was processed with a gradient filter and logarithmed. The false colour picture is a result of a median of five-5 seconds exposures. The processing technique is the same used in the other photo. Stefano Sposetti
spo@dial.eunet.ch


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