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Re: Lunar Occultation continued...
From: Paul Hirose
Date: 2015 Nov 04, 21:19 -0800
From: Paul Hirose
Date: 2015 Nov 04, 21:19 -0800
On 2015-11-02 10:07, Bob Crawley wrote: > > As with Geoffrey I missed the Occultation, thick cloud in Suffolk. Anyway out of interest I used the prediction from the nearby Orwell Observatory [N52d 00.6m E001d 13.8m] and assume that as Astronomers they are spot on for an Observed distance of 0. > Orwell Observatory > Stark tables > reednavigation site corrected > reednavigation site uncorrected > Immersion > Time 214949 > 55’.4 > 55.3 > 55.4 > Emmersion > Time 224824 > 36’.5 > 36’.2 > 36’.6 I don't know what the six angles mean, but I checked lunar distance at the given position and times with my Lunar3 program. Assuming the times are UT1, at immersion I have lunar distance -0.0002° to Aldebaran. At emersion it's +0.0003°. The calculation includes the standard +.5 and -.25 arc second corrections in ecliptic longitude and latitude to approximate the offset between the Moon's center of mass and center of figure. Delta T 68 seconds. Moon position from JPL DE406 ephemeris. Aldebaran position from Hipparcos, the New Reduction (van Leeuwen, 2007).
