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Table Of Index:
  • Apr 23,1998:
  •   Occultation of Venus and Jupiter by Moon
  • Mar 20,1998:
  •   Occultation of +8.5 Mag. Star by -4.6 Mag. Venus (CCD observation)
  • Feb 05,1998:
  •   Occultation of Aldebran by Moon
  • Oct 15,1997:
  •   Occultation of Saturn by Moon


    Occultation of Venus and Jupiter by Moon (Apr 23,1998)
    Photographs by Suhas Gurjar (Click on these thumbnells for Larger version)


    Venus and Jupiter with Moon

    IST: 05:30 Hrs/UT: 00:00 Hrs

    Venus: Just before occultation

    IST: 14:17 Hrs/UT: 08:47 Hrs

    Venus: Just on the edge

    IST: 14:18 Hrs/UT: 08:18 Hrs

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    Occultation of a faint star (+8.5 mag.) by Venus (-4.6 mag.):

    This particular occultation we could not find in any lists. From our Location "Pune,INDIA" (Lon:73o58’E / Lat:18o34'N), While searching for occultations of stars by planet through various softwares we suspected that the star SAO 162764 (R.A.:19h33m43s Dec:-15o49’40" with Mag. of +8.5) will be occulted by Venus (Mag.-4.6) on 21th March at 00:58 UT.

    We tried to calculate the possibility of occultation by manual calculations. With star position for Epoch 1950, no occultation was appeared to be happening. With star position Epoch 2000 also, the occultation was missing narrowly. Thus, we interpolated the star position for 20th March 1998. The calculation results were encouraging. Thus, we decided to observe it through Telescopes and CCD which was provided by IUCAA, Pune.

    Other problem was the huge difference of brightness. Venus was shining at -4.6 and the star at mere +8.5. We felt this difference too big to try any sort of photography. The brightness difference of 2.51^(4.6+8.5) = 2.51^13 = 1,57,000 proved too much for the CCD also.

    If we adjust the exposure time suitable for Venus, the star was undetectable. and if we adjust it for the star, the CCD was saturating and overflowing. Still we managed to expose the CCD for overflowing Venus and star approaching the Venus.

    We could see the star approaching the Venus about 15 minute prior to predicted start of occultation, then onwards, we couldn’t see star visually nor through CCD. Obviously, we couldn’t record the timing of star of the occultation. But from the from the observations we could say that the occultation will take place. We are trying to process the CCD image to predict the occultation timing The final CCD images will also be shortly added on this page.

    The predicted end of occultation was after dawn.

    This event was witnessed our members Suhas Gurjar, Aniruddha Deshpande, Deepak Joshee and Mr.Arvind Paranjpe from IUCAA.

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    Occultation of Aldebran by Moon: (Report)
    date   : fri, 6 feb 1998 02:29:54 +0500 (gmt+0500)
    from   : arvind paranjpye 
    to     : joan and david dunham 
    subject: aldebaran occultation reports
    
    Dear David,
    
    Reporting here timings of occultation of aldebaran taken 
    on 5 Feb 98 from iucaa  (the coordinates reported to you 
    by N.C.Rana/Mridula.  No personal equation was obtained. 
    The "ear and eye method" was used for timing the 
    occultation. Celestron C8 and a 3" refractor was used. 
    
                   Feb.5,98-UT      Feb.6,98-IST
        With C8 :  19:38:15.95      01:08:15.95
        With 3" :  19:38:15.81      01:08:15.81
    
    The sky condition was good but there were thin cloud.
    
    The lead role was played by Aniruddh Deshpande, Suhas Gurjar 
    of the local Amateur Astronomers Association called Jyotirvidya 
    Parisanstha Pune. We also suspects that there was a graze 
    (mag 6.5) at 18:55 ut, is it expected?
    
    Bye
    
    Arvind
    21:04 ut 5/2/98
    
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    Occultation of Saturn by Moon (Oct 15,1997)
    Photograph by Sameer Godbole/Deepak Joshi


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