Photometric observations of asteroid (854) Frostia made in July 2004 show that its light curve is typical of binary asteroids with equal-sized bodies (e.g. Tama, Berna, Debussy, also found by the CdR&CdL team of amateurs).
Size of this object can be measured during stellar occultations. Listed below are selected occultations of Tycho2 and UCAC2 stars by (854) Frostia until the end of 2004. Only those events longer than 1 second are listed which will occur over the populated areas. Durations are given for the supposed diameter of 13 km.
Date U.T. Dur. Star Mag Elon Star
Year Mon dd hh:mm-hh:mm s mag drop o No.
----------------------------------------------------------------
2004 Aug 10 14:18-14:32 1.9 11.1 3.2 165 TYC 5754-00798-1u
2004 Aug 13 13:40-13:55 2.0 11.7 2.7 163 2UCAC 28826381
2004 Aug 23 18:24-18:32 2.5 11.9 2.8 153 2UCAC 28286840
2004 Sep 03 23:30-23:55 3.6 11.6 3.4 142 2UCAC 27933098
2004 Sep 29 01:17-01:32 1.7 11.3 4.3 119 TYC 5766-00402-1u
2004 Oct 11 18:00-18:04 1.1 12.3 3.6 109 2UCAC 27007293
2004 Oct 15 21:07-21:11 1.0 11.0 5.0 106 TYC 5768-00057-1u
----------------------------------------------------------------
Click on time of event for preliminary path chart (25 kB gif)
Year Mon dd Time (U.T.) Region of visibility ---------------------------------------------------------------- 2004 Aug 10 14:23-14:31 Australia 2004 Aug 13 13:48-13:53 South-Eastern Australia 2004 Aug 23 18:24-18:32 Western Australia 2004 Sep 03 23:33-23:49 Eastern Brazil 2004 Sep 29 1:17-1:21 Equador, 1:22 Peru, 1:23-1:32 Brazil 2004 Oct 11 18:01-03 South Africa (Cape Town, Port Elisabeth) 2004 Oct 15 21:08 Namibia, 21:09 South Africa north of Pretoria ----------------------------------------------------------------