Astronomy and Astrophysics – Astronomy
Scientific paper
May 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981icar...46..275s&link_type=abstract
Icarus, vol. 46, May 1981, p. 275-280.
Astronomy and Astrophysics
Astronomy
8
Asteroids, Astronomical Photometry, Light Curve, Planetary Rotation, Electrophotometry, Asteroids, Rotation, Periods, 46 Hestia Asteroid, 155 Thyra Asteroid, Photoelectric Observations, Light Curve, Amplitude, Scattering, Data, Comparisons
Scientific paper
Results of photoelectric observations of the medium-sized minor planets 46 Hestia and 115 Thyra are presented. Thyra, with a rotational period of 7.241 plus or minus 0.001 hours, and a maxima and minima total amplitude of 0.20 mag, is classified as an S-type object. Hestia, with a rotation period of 21.04 plus or minus 0.01 hours, and an amplitude of 0.12 mag, has well-defined minima separated by long-duration flat maxima, and resemble an eclipsing binary system. Multiple scattering factors are found to be 0.054 plus or minus 0.003, and 0.058 plus or minus 0.002 for Hestia and Thyra, respectively. Results are compared with values found by Bowell and Lumme (1979), showing good agreement, although some discrepancy is found with Thyra's low value for the multiple-scattering factor.
Harris Alan W.
Scaltriti Franco
Zappala Vincent
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