Statistics – Computation
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21547501u&link_type=abstract
American Astronomical Society, AAS Meeting #215, #475.01; Bulletin of the American Astronomical Society, Vol. 42, p.522
Statistics
Computation
Scientific paper
The US Naval Observatory (USNO), along with colleagues at Her Majesty's Nautical Almanac Office (HMNAO) in the United Kingdom, produces four joint annual publications through its Nautical Almanac Office: The Astronomical Almanac, The Nautical Almanac, The Air Almanac, and Astronomical Phenomena. The AsA Online, a website companion to The Astronomical Almanac, is also produced by both offices. Over the past few years there have been substantial changes to these annual publications as a result of several factors including recent international resolutions, more precise algorithms, newly available data, and evolving data delivery methods. In 2000 and 2006 the International Astronomical Union (IAU) passed several resolutions resulting in revisions to the precession and nutation theories used to model the rotation of the Earth; this drove the need for new algorithm development. More precise algorithms have been developed for the computation of lunar librations and physical ephemeris data. These algorithms now have all been fully incorporated into the publications. Newly available data and an evolving emphasis on certain topics have been the impetus of some recent additions to the publications. Included in this group are tables of ICRF2 defining sources, exoplanets and their host stars, and spectrophotometric standard stars. New delivery methods are the motivation behind other changes. For example, one publication is now available only on CD-ROM and another has a greatly expanded web presence. This paper will detail the recent changes to these publications.
Barron Eric G.
Bell Aaron S.
Hilton James L.
Hohenkerk Catherine Y.
Stewart Susan G.
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