CCD photometry, spin and shape model of the asteroid 1572 Posnania

Details CCD photometry, spin and shape model of the asteroid 1572 Posnania CCD photometry, spin and shape model of the asteroid 1572 Posnania

May 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001a%26a...371..748m&link_type=abstract

Astronomy and Astrophysics, v.371, p.748-752 (2001)

Astronomy and Astrophysics

Astrophysics

2

Techniques: Photometric, Minor Planets: Asteroids

Scientific paper

Lightcurves of the asteroid 1572 Posnania were obtained at six observatories on 19 nights during four apparitions: in 1993, 1994-95, 1996, and 1999. The synodical period is found to be 8.048 hours and the observed amplitudes of brightness variations are in the range of 0.37-0.40 mag. The sense of rotation is retrograde with a sidereal period Psid = 0.3353931 +/- 0.0000003 days. The ecliptic coordinates of the pole of this asteroid are lambdap = 46deg +/- 6deg and betap = -65deg +/- 5deg. The shape of Posnania can be approximated by a triaxial ellipsoid model with semiaxes ratios a/b = 1.35 +/- 0.01 and b/c = 1.04 +/- 0.03. Partly based on observations collected at the European Southern Observatory, La Silla, Chile.

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