Observations of the 8 December 1987 occultation of AG +40 deg 0783 by 324 Bamberga

Details Observations of the 8 December 1987 occultation of AG +40 deg 0783 by 324 Bamberga Observations of the 8 December 1987 occultation of AG +40 deg 0783 by 324 Bamberga

Sep 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989aj.....98.1094m&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 98, Sept. 1989, p. 1094-1099. Previously announced in STAR as N89-18268.

Other

4

Asteroids, Observation, Occultation, Diameters, Electrophotometers, Ellipsoids, Infrared Radiometers, Shapes, Spheres

Scientific paper

The occultation of AG+40 deg 0783 by 324 Bamberga on 8 December 1987 was observed at 13 sites in the United States, Japan, and China. At four sites the event was observed photoelectrically; the other observations were visual. A least-squares fit of a circular limb profile to the data gives a diameter of 227.6 + or - 1.9 km. However, this solution is inconsistent with a negative visual observation near the northern edge of the ground track. The inconsistency cannot be removed by assuming an elliptical profile. The data suggest that Bamberga, despite its low-amplitude lightcurve, may depart significantly from a spherical or ellipsoidal shape. The asteroid also appears to be at least 10 percent smaller than indicated by infrared radiometry.

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