Phoebe: A preliminary control network and rotational elements

Astronomy and Astrophysics – Astronomy

Scientific paper

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Network Analysis, Phoebe, Planetary Mapping, Satellite Imagery, Stellar Rotation, Albedo, Astronomical Coordinates, Celestial Geodesy, Triangulation, Voyager Project

Scientific paper

A preliminary control network for the Saturnian satellite Phoebe was determined based upon 6 distinct albedo features mapped on 16 Voyager 2 images. Using an existing map and an analytical triangulation program which minimized the measurement error, the north pole of Phoebe was calculated to be alpha0 = 355.0 deg + or - 9.6 deg, delta0 = 68.7 deg + or - 7.9 deg, where alpha0, delta0 are standard equatorial coordinates with equinox J2000 at epoch J2000. The prime meridian of Phoebe was computed to be W = 304.7 deg + 930.833872d, where d is the interval in days from JD 2451545.0 TDB.

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