X2 – Cross-Division A-F Commission Solar System Ephemerides


Solar System Ephemerides are developed for the Sun, Moon, planets, planetary satellites, asteroids and comets to support a broad range of scientific purposes. Since most observations of other bodies are made from Earth, precise knowledge of the orbit of the Earth is used for the reduction of many, if not most, astronomical observations. Accurate ephemerides of the Moon, planets, and planetary satellites are used in the planning and operation of interplanetary spacecraft missions. Ephemerides of the asteroid are used for evaluation of the origin of the solar system, for assessment of possible Earth impact events, and for many other purposes. Rotational elements for these bodies are closely associated with their ephemerides and are often used in data reduction.

The main objectives of the present commission are to promote the acquisition and dissemination of observations of solar system bodies and estimates of their ephemerides and rotational elements. New activities for the current triennium are hints of larger bodies on the Kuiper belt that may exist and correlate the orbits of the main belt and very distant objects. A symposium to discuss recent developments will be proposed.


Commission Members (100)

Under Division

Division A Fundamental Astronomy
Division F Planetary Systems and Bioastronomy

Andrea Milani Comparetti

Università di Pisa
Dipartimento di Matematica
Piazzale B. Pontecorvo 5
56127 Pisa

Phone: +39 050 221 3254
Fax: +39 050 221 3224
Email: milanidmunipiit
Personal website: http://adams.dm.unipi.it/~milani/
Organization website: http://www.unipi.it/index.htm

Last updated:
December 6, 2017

William M. Folkner

JPL m/s 301-121
4800 Oak Grove Dr.
Pasadena 91109
California (CA)
United States

Phone: +1 818-354-0443
Email: williamfolknerjplnasagov

Last updated:
December 6, 2017

Ryan S Park

Jet Propulsion Laboratory
4800 Oak Grove Drive
M/S: 301-121
Pasadena 91109
California (CA)
United States

Phone: +1 818-354-4401
Email: RyanSParkjplnasagov
Organization website: http://ssd.jpl.nasa.gov

Last updated:
December 6, 2017

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