P. Pravec and L. Sarounova, Ondrejov Observatory; and M. Wolf, Charles University, Prague, report: "Our photometric observations of this Apollo object from Ondrejov on six nights during 1998 Dec. 10.0-18.9 UT revealed a lightcurve that is a coaddition of two components of different periods: one has the period 0.6728 +/- 0.0005 day, with amplitude 0.19 mag, and shows two deep minima and little or no variation at phases between them; the other one has the period 0.14973 +/- 0.00002 day, with amplitude 0.06 mag, and most of the signal is in the second harmonic. These periods are consistent with the frequencies found by S. Mottola and F. Lahulla (IAUC 7069); their frequencies apparently correspond to the most significant harmonics, which are the second harmonics in both lightcurve components. Based on our observations, we suggest the hypothesis that 1996 FG3 is a binary asteroid. Details on the observations and the interpretation are on http://sunkl.asu.cas.cz/~ppravec/96fg3.html."
International Astronomical Union Circular
- Pub Date:
- December 1998