Galilean satellite ecilpse timings: The 1990-1991 apparition

Details Galilean satellite ecilpse timings: The 1990-1991 apparition Galilean satellite ecilpse timings: The 1990-1991 apparition

Apr 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994jalpo..37..154w&link_type=abstract

Association of Lunar and Planetary Observers, Journal (ISSN 0039-2502), vol. 37, no. 4, p. 154-164

Computer Science

3

Callisto, Eclipses, Europa, Ganymede, Io, Jupiter (Planet), Time Measurement, Ephemerides, Orbit Calculation, Orbital Elements, Visual Observation

Scientific paper

The Association of Lunar and Planetary Observers (ALPO) Jupiter Section received 802 visual timings of the eclipses of Jupiter's four Galilean satellites from 82 observers for the 1990/91 Apparition, together with 15 CCD and video timings from two observers. For each satellite, eclipse visual disappearance and reappearance timings were adjusted for telescope aperture and were then combined for comparison with the Jet Propulsion Laboratory's `E-2' Ephemeris. The observed positions of Io, Europa, and Ganymede fitted the ephermeris well; Callisto appeared to be about 33 seconds `early' in its orbit, but this difference was not statistically significant.

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