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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
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Near Limb Cleared
Sight GMT LD LD Error Comment
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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
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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.
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LUNARS TIME BRACKET
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Predicted Cleared Lunars
GMT Geocentric Lunar Computed Computed vs
Sight Time Lunar Distance Distance Time Actual GMT Comment
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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'
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* from web Predicted Geocentric Lunar Distances app
Ed