Observations of the Natural Planetary Satellites for Dynamical and Physical Purpose

Details Observations of the Natural Planetary Satellites for Dynamical and Physical Purpose Observations of the Natural Planetary Satellites for Dynamical and Physical Purpose

Dec 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999baas...31.1588a&link_type=abstract

American Astronomical Society, DPS Meeting #31, late abstracts, #59.26; Bulletin of the American Astronomical Society, Vol. 31,

Astronomy and Astrophysics

Astronomy

Scientific paper

At the Institut de mecanique celeste-Bureau des longitudes, we started several programs of observation of the natural planetary satellites. First, we took the opportunity of the transit of the Earth and the Sun in the equatorial plane of Jupiter to observe the mutual phenomena of the Galilean satellites. These observations provide astrometric data of high accuracy useful for dynamical studies of the motions of the satellites and photometric data allowing to characterize the surfaces of the satellites. A campaign was organized leading to 400 light curves made throughout the world in about 40 countries. Second, we started astrometric CCD observations of the faint satellites of Jupiter JVI to JXIII and of the satellite of Saturn Phoebe (SIX) for dynamical purpose at Observatoire de Haute Provence using the 120cm-telescope. PPM, Hipparcos and USNO A.2 catalogue were used for calibration in order to get absolute J2000 R.A. and declination of these objects. In August and December, 1998, CCD observations provided 43 absolute positions of JVI, 23 of JVII, 53 of JVIII, 35 of JIX, 29 of JX, 27 of JXI, 18 of JXII, 16 of JXIII and 135 of SIX (Phoebe). A campaign will also take place in 1999.

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