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    Re: Moon, Venus and Jupiter today
    From: Ed Popko
    Date: 2019 Feb 2, 04:22 -0800

    Andrés,

    I did not get out to do lunars with Jupiter, but I did get a series of good Moon-Venus shots on January 29th.

    The viewing and physical conditions were perfect.

    MOON-VENUS LUNARS
    - January 29, 2019
    - Moon waning crescent (23 days old)
    - KP Lat 28° 41.1'N  Lon 082° 18.2'W
    - WE = 00:00"
    - IE= -0.2' off   IC= +0.2' on- perfect viewing conditions, very dark, no wind
    - GMT, location, timing and night lighting from GPS Anti Spoof Pro
    - easy and stable car hood shooting position, physically quite comfortable
    - Lunar reduction, Frank's web Lunars Calculator
    - Lunar-body time and Geocentric Distances from Frank's web Predicted Geocentric Lunar Distances
    - Astra IIIB with 7x35 scope  IE based on Venus, small error -0.2' not worth resetting mirrors for
    - all shots NEAR limb

    LUNARS SUMMARY
    -----------------------------------------------------------------
                         Near Limb    Cleared
    Sight  GMT      LD               LD        Error  Comment
    -----------------------------------------------------------------
      1.  11:06:55   24° 50.1'   48° 58.7'  -1.1' <-- rejected
      2.  11:09:27   24° 51.1'   48° 58.3'   0.6'
      3.  11.11:23   24° 49.6'   48° 59.9'  -0.4'
      4.  11:13:43   24° 48.7'   49° 00.8'  -0.6'
      5.  11:14:31   24° 48.9'   49° 01.5'  -0.2'
      6.  11:16:35   24° 48.4'   49° 02.9'  -0.1'    LD same as 7
      7.  11:17:13   24° 48.4'   49° 03.6'   0.1'    LD same as 6
      8.  11:18:15   24° 47.8'   49° 05.2'  -0.2'    LD same as 9
      9.  11:19:16   24° 47.8'   49° 05.7'   0.1'    LD same as 8
    10.  11:20:09   24° 47.5'   49° 06.7'   0.0'    <-- fluke
    -----------------------------------------------------------------

    Comment: shot 6 and 7 were same observed LD. The error sign flippes from negative to positive as

    the observed distance was less than it should have been at 6 to now being more than true distance at shot 7 a minute later.


    ----------------------------------------------------------------------------------------------------------------
    LUNARS TIME BRACKET
    ----------------------------------------------------------------------------------------------------------------
                               Predicted         Cleared          Lunars              
               GMT       Geocentric         Lunar            Computed     Computed vs
    Sight   Time      Lunar Distance  Distance        Time              Actual GMT      Comment
    ----------------------------------------------------------------------------------------------------------------
    Almanac 11:00:00    25° 40.8'                                       
           1.     11:06:55                        25° 36.3'       11:09:21    2Min 26sec fast    worst case
           6.     11:16:35                        25° 32.7'       11:16:49             14sec fast
           8.     11:18:15                        25° 31.8'       11:18:41               2sec fast    a good one
         10.     11:20:09                        25° 31.1'       11:20:08               1sec slow   a fluke
    Almanac 12:00:00    25° 11.9'                                       
    ----------------------------------------------------------------------------------------------------------------
    * from web Predicted Geocentric Lunar Distances app

    Ed

       
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