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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Antoine Couëtte
Date: 2023 May 27, 11:26 -0700
From only the 3 published angles : 36°50', 62°41' and 63°02', it is possible to obtain 3 other angles :
UT = 21h42m28 s Lat = N41°28' and Lon W 071°11' (using Venus Center, with own Ephemeris slightly "off" by 0.04')
from which, comparing with Beavertail Point position (N41°27' W071°24') we can observe an error in longitude equal to 13' , quite close from the published value (12').
Given the harsh environment, this Daylight Venus Lunar is nothing short of a remarkable achievement.
I would surmise that the Venus Center of light was actually observed, and it differs from the Center of Gravity by 0.07', which translates into a slightly different determination : UT = 21h42m19s / N41°28' / W071°09' which yields a slightly increased Longitude error equal to 15' this time, which - again and given the environment - does constitute a good and solid result.
Thanks to you Frank for this very interesting and didactic example.
Antoine M. "Kermit" Couëtte
