NavList:

Selected comparisons with Nautical Almanac 2014 Commercial Edition indicate that almanac spreadsheets are good for the next year as they are - with one small exception described below.

The attached newest version of aries_stars.xls has the computed SHA of Rigil Kent. increased by additional 0.3' before display (the original adjustment had been +0.6', so now it is +0.9', see cells W305 and W306) in order to better match with published almanac values.  The also attached what_star.xls has the same change in it.

I do not know why I've had to do this for this one star - maybe it is something in the catalog data for proper motion, or there may be something else due to do the relative proximity of this star.  Anyway, with the SHA difference growing to a persistent value of ~0.3' over the least few years I decided to make this change now. (I see bigger differences than that in the SHA of Polaris, but that is a special case, which does not seem to matter much in practice.)


Peter Hakel
http://www.navigation-spreadsheets.com/almanac_data.html