Rotational brightness variations in Trans-Neptunian Object 50000 Quaoar

Details Rotational brightness variations in Trans-Neptunian Object 50000 Quaoar Rotational brightness variations in Trans-Neptunian Object 50000 Quaoar

Oct 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003a%26a...409l..13o&link_type=abstract

Astronomy and Astrophysics, v.409, p.L13-L16 (2003)

Astronomy and Astrophysics

Astrophysics

13

Scientific paper

Time-resolved broad-band CCD photometry of Trans-Neptunian Object 50000 Quaoar carried out using the 1.5 m telescope at Sierra Nevada Observatory is presented. The lightcurve reveals short-term variability due to rotation of the body. The periodogram analysis shows a peak at 8.8394 +/- 0.0002 h with a confidence level above 99.9%. The lightcurve seems to be double-peaked, and therefore the rotation period would be 17.6788 +/- 0.0004 h. The amplitude of the oscillation is 0.133 +/- 0.028 mag. Under the assumption that the rotational variation is induced by an irregular shape, the minimum axial ratio of Quaoar would then be 1.133 +/- 0.028.

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