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Physical studies of asteroids XXX: the asteroid 153 Hilda |
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| Authors: | C -I Lagerkvist M di Martino C Blanco M Dahlgren A Erikson J F Lahulla M Lazzarin K Lumme S Pohjolainen D Riccioli |
| Institution: | (1) Astronomiska observatoriet, Box 515, 751 20 Uppsala, Sweden;(2) Osservatorio astronomico di Torino, 10025 Pino Torinese, Italy;(3) Università di Catania, Istituto di Astronomia, v.le A. Doria 6, 95125 Catania, Italy;(4) Astronomiska observatoriet, Box 515, 751 20 Uppsala, Sweden;(5) German Aerospace Research Establishment (DLR), Rudower Chaussee 5, 12489 Berlin, Germany;(6) Observatorio Astronómico, Alfonzo XII,3, 28014 Madrid, Spain;(7) Dipartimento di Fisica, Università di Padova, via Marzolo 8, 35131 Padova, Italy;(8) Observatory, University of Helsinki, P.O. Box 14, FIN-00014, Finland;(9) Metsähovi Radio Research Station, Helsinki Univ. of Technology, Otakaari 5A, SF-02150 Espoo, Finland;(10) Università di Catania, Istituto di Astronomia, v.le A. Doria 6, 95125 Catania, Italy |
| Abstract: | The asteroid 153 Hilda was studied by photometric, spectroscopic and polarimetric observations during the apparition in 1992. The rotation period was determined to 5.11 hours with a lightcurve amplitude of 0.05 magnitudes. From our spectrum we find 153 Hilda to be of taxonomic type P. The polarization value of -0.23 at a phase angle of 3.2 degrees seems normal for a P-type asteroid. Long term integrations of the orbit shows that it is stable over time intervals of several million years.Partly based on observations collected at the European Southern Observatory, La Silla, Chile |
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