土星 月惑星研究会 関西支部 (最新)
ALPO-Japan Latest  
Saturn Image 2002/09/29(UT)
Ed Grafton
E.Grafton
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        Ed Grafton (14 inch f/11 Celestron SCT, ST5 CCD 5) 
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Here is the color image from the best set taken September 29th 2002. The
spot is very low contrast but may be visible under excellent seeing with a
decent scope with good contrast. The Luminace for the image was taken over a
few minutes centered at 11:28 UT and the chrominace a few minutes prior to
that.
The CMs at 11:28 UT are CM1 374, CM2 289, CM3 94. The spot is very near the
CM at the time of the images or perhaps just prior to the CM.
  Image data:
        L = 64 .25 sec exposures clear filter
        R = 15 .60 sec exposures red filter
        G = 15 .60 sec exposures green filter
        B = 15 .6o sec exposures blue filter
Seeing was good to excellent 8-9/10. Transparancy was good 7/10, no
wind and heavy dew.
The spot can be seen to rotate with the globe from the images below.

2002/09/29 10:40 (UT)
I=345.9  III= 68.1

2002/09/29 11:09 (UT)
I=  2.9  III= 84.4

2002/09/29 11:18 (UT)
I=  8.2  III= 89.5

2002/09/29 11:28 (UT)
I= 14.1  III= 95.1
  Ed Grafton, Houston Texas, ST5 CCD, 14 inch f/11 Celestron SCT
  Barlow Projection @ f/27 aprox .21 arc seconds per pixel.
  seeing 8/10   transpancy 7/10
  heavy dew

    Gif anyme
Ed Gra
   [Ed Grafton, Houston Texas]
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