Lunar occultation of Aldebaran

The Wikipedia entry for the star Aldebaran contains the following image:

http://en.wikipedia.org/wiki/File:Occultation.jpg



Based on the information on this page (e.g. image was created in July 1997) and after some trial and error with Excel (see screenshots below) I came up with the following plausible coordinates in time and space at which this image may have been created:

New Orleans area:   30N 90W
UT: July 29, 1997,    10h 08m 30s

This really is only one out of many possible solutions, which I did not investigate further.  I neglected refraction which would have a small effect for such a tiny lunar distance (center-to-center topocentric LD = Moon SD = 15.5') and the overall achievable accuracy in this exercise (no obviously visible refractional flattening of Moon's disk).  Parallax is important (center-to-center geocentric LD = 34.4')

Accompanying data look consistent with everything else:
The Moon age (25 days, "waning crescent") and phase (23% or about 1/4 illuminated)
Local time (UT-6h) => around 4am, about an hour before sunrise ("predawn")

The two bodies would have appeared due east at an altitude of roughly 34 degrees.




moon.xls:






aries_stars.xls:






ld_prec.xls:






intercept.xls:


 

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