NavList:

Frank, I need some help with your Halloween: Lunars: altitude accuracy and the 90 degree miracle you referenced. In rerunning an old lunar with a distance near 90 degrees, I get strange results. Below is the best lunar I have shot with an LD near 90 degrees. After clearing etc. it resulted in a GMT 16 seconds fast from the actual time taken. I got lucky.

Below is my Moon-Aldebaran data.  Where I have trouble is retrofitting this sight in the altitude accuracy equations to see how little influence the moon's altitude would have had  though I did take altitudes for this shot. Your web calculator did it for me.  I'm just curious to see what altitude leeway I would have had.

Any help appreciated.  My guess is it is a units problem and also that the moon accuracty equation goes to infinity as it approaches an LD of 90 degrees. 

My best moon-Aldebaran lunar with a LD near 90 degrees using the Reed web calculator:

KP=28°41.1'N 082°18.2'W
Dec 24, 2017 moon-Aldabaran (far) 
GMT of observation 00:05:54

  Moon                  
   HaMoon    37°50.1'   
   Alt Cor     -42.8'   
  Body                  
   HaBody     36°10.7'  
   Alt Cor       01.3'  
  LDa         95°53.6'
 
  >HP            55.19'   

  >LDc        95°04.5'  Cleared 
  >%Change       -0.85  % difference Pre-cleared -> cleared 
  >delZcos       -0.706         
  >delZ         136.2°  
                        
GMT from Lunar Observation
  00:00:00  95°07.7'  Almanac bracket
  00:06:15  95°04.5   Computed time from LDc
  03:00:00  93°35.6'  Almanac bracket


GMT Summary
 --------------------                
 LDo           00:05:54  Actual GMT of observation
 LDc           00:06:15  Calculation GMT from LD observation
 Difference 00:00:21  LD calculated GMT was fast 21 seconds


Accuracy Required minutes of arc
Moon: ? -86 <----------------------------------  PROBLEM HERE
Body: 7'