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Re: Moon, Venus and Jupiter today
From: Ed Popko
Date: 2019 Feb 2, 14:01 -0800

Ron,

Thanks for looking at it.

I made a huge cut/paste error in the Cleared LD column. The original post was hugely wrong, not even remotely close. Surprising I did not see this huge error jump out before posting. The values in the LUNARS SUMMARY are correct. The interpolations still stand, the Cleared LDs listed there were correct.

BTW, if you need lunars test cases, I have several text files I can send you which offers a mix of personal cases and ones taken from classic 19th century text book examples. I use them to check my calculator programs as I have programed four different lunars algorithms.

LUNARS SUMMARY
-----------------------------------------------------------------
                     Near Limb    Cleared
Sight GMT      LD [1]         LD [2]    Error [2] Comment
-----------------------------------------------------------------
1. 11:06:55   24° 50.1'   25° 36.3' -1.1' <-- rejected
2. 11:09:27   24° 51.1'   25° 36.8'   0.6'
3. 11.11:23   24° 49.6'   25° 34.9' -0.4'
4. 11:13:43   24° 48.7'   25° 33.6' -0.6'
5. 11:14:31   24° 48.9'   25° 33.6' -0.2'
6. 11:16:35   24° 48.4'   25° 32.7' -0.1' LD same as 7
7. 11:17:13   24° 48.4'   25° 32.6'   0.1' LD same as 6
8. 11:18:15   24° 47.8'   25° 31.8' -0.2' LD same as 9
9. 11:19:16   24° 47.8'   25° 31.6'   0.1' LD same as 8
10. 11:20:09   24° 47.5'   25° 31.1'   0.0' <-- fluke
-----------------------------------------------------------------
[1] observed

[2] reduced using Reed's Lunars Calclator

--------------------------------------------------------------------------------------------------------
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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