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Cidadao Images of Comet 1996 B2 Hyakutake

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Observer: Antonio Jose Cidadao
Location: Oeiras, Portugal
Date: March 21, 1996 01:34 - 03:20 UT



First Image:

Notes: Tricolour (RGB) image Comet 1996B2; total of 28 images of 15 sec. each 
       in "track-and-accumulate" mode (tracking was performed on the comet 
       nucleus). CCD field shown is about 15' x 10'.

       The 4 images shown are the result of various processings of the same 
       original. 
      
       A logaritmic processing is shown on (a) in order to demonstrate the 
       star-like appearance of the nucleus region.

       The result of histogram equalization is shown on (b).

       Picture (c) is the grayscale counterpart of (a) observed with a 
       false-colour LUT.

       When a more aggressive processing was used in order to subtract 
       the coma (d), various "jets" were clearly seen.



       Member of A.P.A.A. (Associacao Portuguesa de Astronomos Amadores)

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Telescope: Schmidt-Cassegrin, Meade LX200, 10", f/10, equatorially mounted

Focal reducer (f/6.3): yes

Camera: SBIG ST6

Filter wheel (CFW6-A): yes

Filters: IR blocking + RGB

Exposure: red (4x15 sec) 60s sec.
          green (8x15 sec) 120 sec.
          blue (16x15 sec) 240 sec.

Date: 03/21/96 (red exposure beginning at 01h34min UT)
               (green exposure beginning at 01h38min UT)
               (blue exposure beninning at 01h45min UT)

Site: Oeiras, Portugal ("roof-top" observatory)

Image Proc. Software: CCDOPS; PhotoShop

Second Image: Notes: Comet 1996B2; 4 images of 30 sec. each in "track-and-accumulate" mode (tracking was performed on the comet nucleus). Original image was obtained with a 50mm (f/1.4) photographic lens and a SBIG ST6 CCD camera, piggy-back mounted on a 10" LX200 Member of A.P.A.A. (Associacao Portuguesa de Astronomos Amadores) ----------------------------------------------------------------------------- Camera: SBIG ST6 Filter wheel (CFW6-A): no Filters: none Exposure: 120 sec. Date: 03/21/96 (beginning at 03h 20min UT) Site: Oeiras, Portugal ("roof-top" observatory) Image Proc. Software: CCDOPS; WinMiPS; PhotoShop ----------------------------------------------------------------------------- Antonio Jose Cidadao Rua D. Antonio Luis de Menezes, No9, 3A, phone: +351-1-4412192 S. Juliao da Barra, Oeiras, 2780 Oeiras PORTUGAL e-mail: a.cidadao@telepac.pt ----------------------------------------------------------------------------- Antonio Jose Cidadao Member of A.P.A.A. (Associacao Portuguesa de Astronomos Amadores) a.cidadao@telepac.pt

 
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