CCD PHOTOMETRY OF THE ASTEROID-1620 GEOGRAPHOS

Authors
MICHALOWSKI T KWIATKOWSKI T BORCZYK W PYCH W
Citation
T. Michalowski et al., CCD PHOTOMETRY OF THE ASTEROID-1620 GEOGRAPHOS, Acta Astronomica, 44(2), 1994, pp. 223-226
Citations number
6
Categorie Soggetti
Astronomy & Astrophysics
Journal title
Acta Astronomica → ACNP
ISSN journal
00015237
Volume
44
Issue
2
Year of publication
1994
Pages
223 - 226
Database
ISI
SICI code
0001-5237(1994)44:2<223:CPOTAG>2.0.ZU;2-S
Abstract
Photometric CCD light curves of 1620 Geographos are presented. Using a ll available Observations we estimate the retrograde sense of rotation with the sidereal period of 0.21763867 +/- 0.00000008 days. A solutio n for the spin vector gives in ecliptic coordinates (1950.0) lambda(p) = 54-degrees +/- 6-degrees and beta(p) = -52-degrees +/- 6-degrees. A ssuming a triaxial ellipsoid model we obtain axial ratios of a/b = 2.6 +/- 0.3 and b/c = 1.1 +/- 0.2