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Astron. Astrophys. 318, 631-638 (1997)

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UESAC - The Uppsala-ESO survey of asteroids and comets *

O. Hernius 1, 5, C.-I. Lagerkvist 1, 3, M. Lindgren 1, G. Tancredi 2 and G. V. Williams 4

1 Astronomiska observatoriet, Box 515, S-752 20 Uppsala, Sweden
2 Depto. de Astronomia, Facultad de Ciencias, Tristan Narvaja 1674, 11200 Montevideo, Uruguay
3 Institute for Planetary Exploration DLR, Rudower Chausse 5, D-10489 Berlin, Germany
4 Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, USA
5 Observatorio, Pl 14, FIN-00014 Helsingin Yliopisto, Finland

Received 3 June 1996 / Accepted 19 August 1996

Abstract

More than 15 000 positions of moving objects have been detected on 74 plates and films obtained at the European Southern Observatory in Chile and the Anglo-Australian Observatory in Australia during Jupiter's oppositions in 1992 and 1993. Two or more positions have been secured for about 3400 asteroids, and orbits have so far been calculated for about 2500 asteroids. The majority of these asteroids are previously undetected.

We present apparent magnitudes for all observed asteroids and absolute magnitudes for those asteroids with orbits. We present model-diameters based on a Monte Carlo approach using the albedo distribution found by the IRAS Minor Planet Survey (Tedesco et al. 1992). Model-diameters are also calculated for the asteroids observed in the Palomar-Leiden Survey of Faint Minor Planets, PLS, (van Houten et al. 1970). Statistics of orbital elements are presented and compared with the results of the PLS.

Key words: minor planets; asteroids – surveys – solar system: general

* Based on observations collected at the European Southern Observatory, La Silla, Chile

Send offprint requests to: C.-I. Lagerkvist

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© European Southern Observatory (ESO) 1997

Online publication: July 8, 1998
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