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Thanks to Paul Hirose for correcting a webpage reference that I had copied,
and stating the correct webpage showing that attempted photo-lunar, at-

http://www.starpath.com/cgi-bin/ubb/ultimatebb.cgi?ubb=get_topic;f=31;t=000017

Paul's conclusions and mine seem to agree well.

This may perhaps suggest a possible enhancement to Frank Reed's lunar
distance website. Instead of just multiplying the discrepancy in lunar
distance by a constant factor of 30, to obtain longitude error, I wonder if
it would be possible (and relatively easy) to actually compute that error,
allowing for such geometric misalignments (and perhaps also, differences in
the angular speed of the Moon). That would then at least draw the attention
of a user to the fact that he was measuring a lunar distance in a silly
direction; such a warning would have been useful here.

George.

contact George Huxtable at george@huxtable.u-net.com
or at +44 1865 820222 (from UK, 01865 820222)
or at 1 Sandy Lane, Southmoor, Abingdon, Oxon OX13 5HX, UK.


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