Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007dps....39.3602m&link_type=abstract
American Astronomical Society, DPS meeting #39, #36.02; Bulletin of the American Astronomical Society, Vol. 39, p.485
Astronomy and Astrophysics
Astronomy
Scientific paper
NASA's Deep Space 1 mission target, comet 19P/Borrelly was observed in July 2000 for five nights at the CTIO 1.5m telescope. A rotation period of 26±1 hours was determined from the lightcurve (Mueller and Samarasinha 2002). Dr. Heike Rauer and colleagues observed the comet for three nights in August, and two nights in September 2000. The precision of the derived rotation period depends critically on the length of the observing window. Therefore, combining our data with their data increases the time baseline substantially and narrows down the error bars for the rotation period to a few minutes. We will present the results at the meeting. This precise period determination for 19P/Borrelly also enables comparisons with future determinations of the rotation period and can be used to model the evolution of the spin state of this comet.
We gratefully acknowledge the support of this work by NASA DDAP grant NNG06GF91G.
References:
Mueller, B.E.A. and N.H. Samarasinha 2000.
Visible Lightcurve Observations of Comet 19P/Borrelly.
Earth, Moon and Planets 90, 463-471.
Mueller Beatrice E.
Samarasinha Nalin H.
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