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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

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