Redefinition of System III longitude

Details Redefinition of System III longitude Redefinition of System III longitude

Mar 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976icar...27..457r&link_type=abstract

Icarus, vol. 27, Mar. 1976, p. 457-459; Discussion, p. 459.

Astronomy and Astrophysics

Astronomy

30

Jupiter (Planet), Longitude, Planetary Rotation, Ephemeris Time, Radio Astronomy, Sidereal Time

Scientific paper

It is shown that the provisional rotation period of 9 hr 55 min 29.37 sec adopted for Jupiter's System III (1957.0) longitude measure is inadequate for current use because it is in error by a small amount. Several errors in current calculations of System III (1957.0) are noted, and it is proposed that a new System III measure be adopted for which the sidereal rotation rate of Jupiter is 870.536 deg per Ephemeris Day, which gives a period of about 9 hr 55 min 29.711 sec. It is also proposed that the epoch be 0 hr 0 min 35.73 sec Ephemeris Time, January 1, 1965; that the longitude at epoch of the central meridian, as observed from earth, be 217.956 deg; and that the system be called System III (1965).

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