Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007a%26a...463.1197t&link_type=abstract
Astronomy and Astrophysics, Volume 463, Issue 3, March I 2007, pp.1197-1199
Astronomy and Astrophysics
Astrophysics
Minor Planets, Asteroids, Solar System: General
Scientific paper
Aims:The asteroid (132524) 2002 JF{56} was the distant fly-by target of the New Horizons spacecraft on June 13, 2006. To further enhance our knowledge of this asteroid and facilitate the cross-calibration of the spacecraft instruments, ground based observations of the asteroid were performed in May 2006 at ESO VLT. Methods: Photometry and spectroscopy of (132524) 2002 JF{56} were performed: a set of R filter broadband images and reflectance spectra were taken with FORS2 of the ESO VLT for a total of three nights (May 25, 30 and 31, 2006). Each observational cycle spans a time interval of about one hour per night. The observations were performed about two weeks before the fly-by, when the asteroid was at a heliocentric distance of 2.5 AU. Results: The reflectance spectra of 2002 JF{56} resemble those of S-type asteroids. From the photometry of the asteroid, an effective diameter of about 2.3 km is estimated and a lower limit for the axis-ratio of (1.19 ± 0.02) is determined.
Based on observations performed
at the European Southern Observatory, Chile (ESO Programme 77.C-0609).
Barrera Luis
Boehnhardt Hermann
Duffard René
Tubiana Cecilia
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