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7.0 Notes, References, And URLs
1. Kaplan, G. (1990), Bulletin of the American Astronomical Society, Vol. 22, pp. 930-
931.
2. See explanation and references at http://aa.usno.navy.mil/AA/faq/docs/ICRS_doc.html
3. ESA, 1997, The Hipparcos and Tycho Catalogues, ESA SP-1200. See also
http://astro.estec.esa.nl/Hipparcos/catalog.html
4. See http://aries.usno.navy.mil/ad/act/act.html
5. See http://maia.usno.navy.mil/ICRF/
6. The JPL ephemerides are available free for download from ftp server
navigator.jpl.nasa.gov/ephem/export or on CD-ROM for a modest fee from
Willmann-Bell, Inc. http://www.willbell.com/software/jpl.htm
7. See http://hpiers.obspm.fr/
8. Hilton, J. (1999), Astronomical Journal, Vol. 117, pp. 1077-1086. See also
http://aa.usno.navy.mil/hilton/ephemerides/asteroid_ephemerides.html
9. Kaplan, G., et al. (1989) Astronomical Journal, Vol. 97, p. 1197.
10. Kaplan, G. (1998) Astronomical Journal, Vol. 115, p. 361
11. The Astronomical Almanac and other related publications are described at
http://aa.usno.navy.mil/AA/publications/docs/almanacs.html
12. See http://maia.usno.navy.mil/
