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Cidadao Image of Comet 1996 B2 Hyakutake

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Observer: Antonio Jose Cidadao
Location: Oeiras, Portugal
Date: March 21, 1996 02:52 - 05:29 UT



First Image:

Notes: Tricolour (RGB) image Comet 1996B2; total of 20 images of 30 sec.=
 each=20
       in "track-and-accumulate" mode (tracking was performed on the comet=
=20
       nucleus). CCD field shown is about 15' x 10'.

       When a more aggressive processing was used in order to subtract=20
       the coma (insert), various "jets" were seen more clearly. This insert
       is also present in all other pictures obtained this day.



       Member of A.P.A.A. (Associa=E7=E3o Portuguesa de Astr=F3nomos=
 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 (4x30 sec)120s sec.
          green (8x30 sec) 240 sec.
          blue (8x30 sec) 240 sec.

Date: 03/21/96 (red exposure beginning at 02h42min UT)
               (green exposure beginning at 02h47min UT)
               (blue exposure beninning at 02h 55min UT)

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

Image Proc. Software: CCDOPS; PhotoShop

Second image: Notes: Comet 1996B2; 18 images of 30 sec. each in "track-and-accumulate"= mode (tracking was performed on the comet nucleus). Original image was obtained with a 135mm (f/1.8) telephoto lens and a SBIG ST6 CCD camera, piggy-back mounted on a 10" LX200 =20 Insert is the same that appears on the first image. CCD field is 3.5 x 2.75 degrees. Member of A.P.A.A. (Associacao Portuguesa de Astronomos Amadores) ----------------------------------------------------------------------------= - Camera: SBIG ST6 Filter wheel (CFW6-A): no Filters: none Exposure: 540 sec. Date: 03/21/96 (beginning at 05h 29min UT) Site: Oeiras, Portugal ("roof-top" observatory) Image Proc. Software: CCDOPS; WinMiPS; PhotoShop
Third image: Notes: Comet 1996B2; 30 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 =20 Insert is the same that appears on the first image. Member of A.P.A.A. (Associacao Portuguesa de Astronomos Amadores) ----------------------------------------------------------------------------= - Camera: SBIG ST6 Filter wheel (CFW6-A): no Filters: none Exposure: 900 sec. Date: 03/21/96 (beginning at 03h 46min UT) Site: Oeiras, Portugal ("roof-top" observatory) Image Proc. Software: CCDOPS; WinMiPS; PhotoShop
Fourth image: Notes: Comet 1996B2; 30 images of 30 sec. each in "track-and-accumulate"= mode (tracking was performed on the comet nucleus). Original image was obtained with a 28mm (f/3.5) photographic lens and a SBIG ST6 CCD camera, piggy-back mounted on a 10" LX200 =20 Insert is the same that appears on the first image. Member of A.P.A.A. (Associacao Portuguesa de Astronomos Amadores) ----------------------------------------------------------------------------= - Camera: SBIG ST6 Filter wheel (CFW6-A): no Filters: none Exposure: 900 sec. Date: 03/21/96 (beginning at 04h 39min 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 ----------------------------------------------------------------------------=

 
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