We present the results of photometric observations of 16 M-type asteroids performed from 1984 through 1990. The observations have been carried out at the Teramo and Torino Astronomical Observatories, Italy, and at the European Southern Observatory (ESO), La Silla, Chile. We have determined for the first time a reliable rotational period for the asteroids 369 Aeria (PSyn = 4.h787), 785 Zwetana (PSyn = 8.h919) and 798 Ruth (PSyn = 10.h35). We have estimated the shape and the pole coordinates of 135 Hertha and 250 Bettina and also checked those of 16 Psyche, 21 Lutetia, 22 Kalliope, 129 Antigone and 216 Kleopatra. Composite lightcurves have been derived for nine of the observed objects (83 Beatrix, 97 Klotho, 110 Lydia, 129 Antigone, 135 Hertha, 216 Kleopatra, 369 Aeria, 785 Zwetana and 798 Ruth). Reasonably single lightcurve's coverage has been obtained for the majority of the reamining ones. For some asteroids transformations to the standard system have been performed.
M-type asteroids: Rotational properties of 16 objects
Rotundi A.;
1992-01-01
Abstract
We present the results of photometric observations of 16 M-type asteroids performed from 1984 through 1990. The observations have been carried out at the Teramo and Torino Astronomical Observatories, Italy, and at the European Southern Observatory (ESO), La Silla, Chile. We have determined for the first time a reliable rotational period for the asteroids 369 Aeria (PSyn = 4.h787), 785 Zwetana (PSyn = 8.h919) and 798 Ruth (PSyn = 10.h35). We have estimated the shape and the pole coordinates of 135 Hertha and 250 Bettina and also checked those of 16 Psyche, 21 Lutetia, 22 Kalliope, 129 Antigone and 216 Kleopatra. Composite lightcurves have been derived for nine of the observed objects (83 Beatrix, 97 Klotho, 110 Lydia, 129 Antigone, 135 Hertha, 216 Kleopatra, 369 Aeria, 785 Zwetana and 798 Ruth). Reasonably single lightcurve's coverage has been obtained for the majority of the reamining ones. For some asteroids transformations to the standard system have been performed.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
