Photometry of Phoebe

Details Photometry of Phoebe Photometry of Phoebe

Oct 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986icar...68..167k&link_type=abstract

Icarus (ISSN 0019-1035), vol. 68, Oct. 1986, p. 167-175.

Astronomy and Astrophysics

Astronomy

9

Asteroids, Astronomical Photometry, Light Curve, Phoebe, Brightness, Goodness Of Fit, Rotation, Voyager 2 Spacecraft, Saturn, Satellites, Phoebe, Photometry, Earth-Based Observations, Ccd Methods, Rotation, Period, Comparisons, C Asteroids, Lightcurve, Origin, Surface, Optical Properties, Brightness, Harmonics, Capture

Scientific paper

The nonsynchronous rotational period and light curve for Phoebe are analyzed. The variations in CCD chip pixel response, the intensity of the images, the sky background level, and the atmospheric effects and color response of the detector are examined. Consideration is also given to brightness variations and the solar phase function at small phase angles (0.2-1.2 deg) of the light curve. The Phoebe surface is compared with asteroid surfaces by fitting the data to a linear phase function. It is determined that the Phoebe's sidereal rotational period is refined to 9.282 + or - 0.015 hr, the light curve in V filter exhibits 20 percent brightness variations with weaker higher-order harmonics, and the solar phase coefficient at angles less than 1.2 deg is 0.180 + or 0.035 mag/deg. The Phoebe data at small phase angles correlated well with a phase function for C-type asteroids.

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