The rotational and physical properties of the Centaur (32532) 2001 PT13

Details The rotational and physical properties of the Centaur (32532) 2001 PT13 The rotational and physical properties of the Centaur (32532) 2001 PT13

Aug 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003icar..164..418f&link_type=abstract

Icarus, Volume 164, Issue 2, p. 418-427.

Physics

9

Scientific paper

We present observations of the Centaur (32532) 2001 PT13 taken between September 2000 and December 2000. A multi-wavelength lightcurve was assembled from V-, R- and J-band photometry measurements. Analysis of the lightcurve indicates that there are two peaks of slightly different brightness, a rotation period of /0.34741+/-0.00005 day, and a maximum photometric range of 0.18 mag. We obtained VRJHK colors (V-/R=0.50+/-0.01, V-/J=1.69+/-0.02, V-/H=2.19+/-0.04, and V-/K=2.30+/-0.04) that are consistent with the grey KBO/Centaur population. The V-R color shows no variation as a function of rotational phase; however, we cannot exclude the possibility that rotational variations are present in the R-J color. Assuming a 4% albedo, we estimate that 2001 PT13 has an effective diameter of 90 km and a minimum axial ratio /a/b of 1.18. We find no evidence of a coma and place an upper limit of 15 gs-1 on the dust production rate.

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