Asteroid lightcurve observations from 1979-1981
Abstract
Results of photoelectric lightcurve observations from Table Mountain Observatory are reported. Most of the observations were made from January 1980 through March 1981. Some earlier observations are included from 1979 which were previouly only partially reported ( A. W. Harris and J. W. Young, 1983, Icarus 54, 59-109), and some observations of one asteroid in 1984 are included. In addition to the printed paper, we provide (on request to the first author) a machine readable file of the observations. About 70 different asteroids are reported, in all. Several errors in our 1983 paper are corrected. These include a few preliminary period estimates from the 1980 data, which were listed in Appendix II of that paper, which proved to be in error on careful analysis. In all about dozen new or significantly revised periods are reported. All observations gere made in the V band, with estimates of the mean and maximum reduced magnitudes given for each object. Sufficient phase angle coverage was obtained for 33 objects to obtain fits of the H- G magnitude relation ( E. Bowell et al. 1989 , in AsteroidsII (R. Binzel, T. Gehrels, and M. Matthew, Eds.), Univ. of Arizona Press, Tucson, in press) to the data. From these fits, we examine the mean values of the slope parameter, G, for different taxonomic classes. These values are then applied in the analysis of less complete data sets. For the moderate albedo asteroids (classes S and M), the H- G relation appears to fit the available data well. However, for dark asteroids, the relation appears to predict more of an opposition effect than is typically present.
- Publication:
-
Icarus
- Pub Date:
- October 1989
- DOI:
- Bibcode:
- 1989Icar...81..314H
- Keywords:
-
- Asteroids;
- Electrophotometers;
- Light Curve;
- Astronomical Catalogs;
- Space Observations (From Earth);
- ASTEROIDS;
- LIGHTCURVES;
- ASTRONOMY;
- PHOTOELECTRIC METHODS;
- CATALOG;
- DATA;
- EARTH-BASED OBSERVATIONS;
- MAGNITUDE;
- OPTICAL PROPERTIES;
- PHASE CURVES;
- ANALYSIS;
- ROTATION;
- PERIOD;
- TECHNIQUES