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    Vacation-time Lunars
    From: Ed Popko
    Date: 2018 Feb 2, 13:32 -0800

    On a recent winter escape to Central Florida, I had opportunities to shoot many moon-sun and moon-star lunars. Below are are some moon-sun shots. I'll post a second set with moon-Aldebaran and moon-Pollux shots.

    I had better luck than I deserve and walked away with some techniques that made shooting lunars both easier and more accurate. For the cases below, I used Frank’s Lunars Calculator though I also worked them by the Bowditch-Thompson method and Frank’s ‘Lunars are Easy’ algorithms, both taught in his Lunars Workshop at Mystic Seaport.  The results were quite good.

    Date January 24, 2018     Moon-Sun (near limb)

    KP   Lat 28 41.1’  Lon 082 18.3’

    Moon waxing, near limbs sighted

    WE 00”

    IE 0.0’

                                                                                                  Reed’s            

    Sight No.       GMT         LDa              LD Pre-Cleared   Calculated Error    LD Cleared

           1            19:34:36   88º 33.2’     89º 05.4’                    0.6’                      88 34.4’

           2            19:36:06   88º 33.4’     89º 05.6’                    0.2’                      88 34.8’

           3            19:37:01   88º 33.4’     89º 05.6’                   -0.2’                     88 34.9’

           4            19:38:00   88º 33.9’     89º 06.1’                    -0.1’                     88 35.5’

           5            19:39:14   88º 34.1’     89º 06.3’                   -0.4                       88 35.8

           6            19:40:18   88º 35.0’     89º 07.2’                    0.0’                      88 36.8

    Average

        1-6            19:37:33   88 33.8’      89 06.0’                      0.1’                      88 35.3

     

    LD GMT Time Bracket

                                                   Interpolated      Interpolated GMT

              GMT        Cleared LD         GMT          vs Observation GMT

          19:00:00      88º 15.9’

      1                        88º 34.4’      19:35:41         00:01:05 fast    ...    could have rejected this one

      2                        88º 34.8’       19:36:28        00:00:22 fast

      3                        88º 34.9’       19:36:39        00:00:22 slow

      4                        88º 35.5’       19:37:49        00:00:11 slow

      5                        88º 35.8’       19:38:24        00:00:50 fast

      6                        88º 36.8’       19:40:19        00:00:01 fast

    1-6                       88º 35.3’      19:37:26        00:00:02 slow

         20:00:00        88º 47.0’

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