RE: daylight visual satellite 10th Oct 2005

From: Ted Molczan (seesat@rogers.com)
Date: Mon Oct 10 2005 - 09:43:45 EDT

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    Stephen asked:
    
    > could someone tell me what star or satellite I can see during 
    > the day over Somerset West, Cape Province, South Africa.
    > My pos. on my gps tells me I'm at 34 04.367 S, 018 51.638 E,
    > at an elevation of 73m above sea level.
    >
    > Because of the earths rotation it appears to move from south 
    > east to north west. It appears as a reasonably bright star
    > during the day, (although quite difficult to find first off).
    > Its altitude at 1pm (1300) south african time, was 70 degrees
    > above the horizon with an azimuth of 110 degrees (if that is
    > the correct way of saying 20 degrees south of east). Its 
    > altitude at 2pm (1400) south african time was about 85 degrees
    > above the horizon and its azimuth 80 degrees. I first noticed
    > it about a week ago.
    
    That is the planet Venus. I have appended its az/el ephemeris, generated by:
    
    http://ssd.jpl.nasa.gov/cgi-bin/eph
    
    Your observed estimated positions are in reasonable agreement.
    You can see the approx SE to NW path you observed.
    
    Ted Molczan
    
          Target Body: Planet Venus
    Observer Location: User Specified Location
          Coordinates: 1851'38.3''E, 3404'22.0''S, 73 m
    
             UTC              AZ       EL      
     2005-Oct-10 07:00 *   113.1163   7.3313
     2005-Oct-10 08:00 *   105.6633  19.0468
     2005-Oct-10 09:00 *    98.4626  31.1888
     2005-Oct-10 10:00 *    90.8126  43.5618
     2005-Oct-10 11:00 *    81.3963  55.9470
     2005-Oct-10 12:00 *    66.5303  67.9003
     2005-Oct-10 13:00 *    31.6531  77.5570
     2005-Oct-10 14:00 *   325.2081  77.1801
     2005-Oct-10 15:00 *   292.2523  67.2690
     2005-Oct-10 16:00 *   277.8876  55.2742
     2005-Oct-10 17:00 C   268.6232  42.8908
     2005-Oct-10 18:00 A   261.0166  30.5379
     2005-Oct-10 19:00     253.8094  18.4308
     2005-Oct-10 20:00     246.3165   6.7671
     
    * denotes sun above horizon
    C denotes civil twilight
    A denotes astronomical twilight
    
    
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