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RE : http://fer3.com/arc/m2.aspx/Online-sight-reduction-program-GeoffreyKolbe-dec-2013-g25949

Hello Geoffrey,

How about a look at :

http://aa.usno.navy.mil/data/docs/celnavtable.php

?

It will give you all necessary data for ALL celestial bodies at any single time and position on Earth. You just pick up you own relevant body and simply compare actual Sextant height with computed height as per the published results.

I have to say that the Moon Parallax seems to be a 2D Computation, while 3D computation should always be the rule if one wants to ensure 0.1' accuracy in all and any circumstances. However, I you can accept such parallaxes hard bounded by errors never exceeding - and quite seldom indeed - 0.17' i.e. up to 10 " [arcseconds], then go for it !

BTW, with an exceptional 363 days ahead of time :

HOLY AND MERRY CHRISTMAS TO YOU, and

with only 5 days in advance :

HAPPY NEW YEAR 2014

Kermei

Antoine M. "Kermit" Couëtte

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