Study of the 2003 QO104 Asteroid

Details Study of the 2003 QO104 Asteroid Study of the 2003 QO104 Asteroid

Sep 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009dps....41.5010v&link_type=abstract

American Astronomical Society, DPS meeting #41, #50.10

Astronomy and Astrophysics

Astronomy

Scientific paper

From the Astronomical Observatory -University of Nariño, located at the city of Pasto (Nariño-Colombia) we recently took photographs of two asteroids considerably large. The asteroids are designated 2003 QO104 and 1994 CC. The main objective of this work is the study of the 2003 QO104 whose diameter ranges from 2.5 to 4 kilometers. This massive asteroid is about 1/3rd the size of the K-T impactor that probably wiped out the dinosaurs 65 million years ago. It was discovered on August 31st 2003 by the NEAT-Haleakala-AMOS system and turns around the Sun in 1139.73 days. It was at a 36.8 Lunar distance on June 9th 2009 (miss distance). We studied the asteroid 2003 QO104 during several days of June of this year and we carried out precision astrometry. The data was endorsed by the MINOR PLANET CENTER (MPC) of the United States and along with them we calculated the orbital parameters. Our observatory's code at the MPC is "H78". Our data also appears at the web page of NEODyS. Taking into account the gravitational perturbations caused by various bodies, the results obtained are the following: eccentricity = 0.5244282, semi-major axis = 2.13491648 A.U, orbital inclination = 11.61549 deg, longitude of the ascending node = 58.30828 deg, argument of perihelion = 183.53924 deg, orbital period = 3.12 years, mean motion = 0.31596046 deg/d, perihelion distance = 1.01530595 A.U, aphelion distance = 3.25452701 A.U. The parameters were calculated based on 72 observations: from june 3/2009 to june 20/2009 with RMS error = 1.393 arcseconds. Pictures of the 2003 QO104 were published at SPACEWEATHER (june 09/2009) web and were captured with the following equipment: 14” LX200 GPS MEADE (f/10 Schmidt-Cassegrain Telescope) and STL-1001 SBIG camera.

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