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Title:
JPL's On-Line Solar System Data Service
Authors:
Giorgini, J. D.; Yeomans, D. K.; Chamberlin, A. B.; Chodas, P. W.; Jacobson, R. A.; Keesey, M. S.; Lieske, J. H.; Ostro, S. J.; Standish, E. M.; Wimberly, R. N.
Affiliation:
AA(JPL/Caltech), AB(JPL/Caltech), AC(JPL/Caltech), AD(JPL/Caltech), AE(JPL/Caltech), AF(JPL/Caltech), AG(JPL/Caltech), AH(JPL/Caltech), AI(JPL/Caltech), AJ(JPL/Caltech)
Publication:
American Astronomical Society, DPS meeting #28, id.25.04; Bulletin of the American Astronomical Society, Vol. 28, p.1158
Publication Date:
09/1996
Origin:
AAS
Bibliographic Code:
1996DPS....28.2504G

Abstract

Numerous data products from the JPL ephemeris team are being made available via an interactive telnet computer service and separate web page. For over 15,000 comets and asteroids, 60 natural satellites, and 9 planets, users with an Internet connection can easily create and download information 24 hours a day, 7 days a week. These data include customized, high precision ephemerides, orbital and physical characteristics, and search-lists of comets and asteroids that match combinations of up to 39 different parameters. For each body, the user can request computation of more than 70 orbital and physical quantities. Ephemerides output can be generated in ICRF/J2000.0 and FK4/1950.0 reference frames with TDB, TT, or UTC timescales, as appropriate, at user specified intervals. Computed tables are derived from the same ephemerides used at JPL for radar astronomy and spacecraft navigation. The dynamics and computed observables include relativistic effects. Available ephemeris time spans currently range from A.D. 1599-2200 for the planets to a few decades for the satellites, comets and asteroids. Information on the interference from sunlight and moonlight is available. As an example of a few of the features available, we note that a user could easily generate information on satellite and planetary magnitudes, illuminated fractions, and the planetographic longitudes and latitudes of their centers and sub-solar points as seen from a particular observatory location on Earth. Satellite transits, occultations and eclipses are available as well. The resulting ASCII tables can be transferred to the user's host computer via e-mail, ftp, or kermit protocols. For those who have WWW access, the telnet solar system ephemeris service will be one feature of the JPL solar system web page. This page will provide up-to-date physical and orbital characteristics as well as current and predicted observing opportunities for all solar system bodies. Close Earth approaches and radar observations will be provided for comets and asteroids.
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