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http://dx.doi.org/10.5467/JKESS.2016.37.7.398

Geocentric parallax measurements of Near-Earth Asteroid using Baselines with domestic small-size observatories  

Jeong, Eui Oan (Department of Earth Science Education, Korea National University of Education)
Sohn, Jungjoo (Department of Earth Science Education, Korea National University of Education)
Publication Information
Journal of the Korean earth science society / v.37, no.7, 2016 , pp. 398-407 More about this Journal
Abstract
We cooperated with four domestic educational astronomical observatories to construct a baseline and perform simultaneous observations to determine the geocentric parallax, distance, and motion of 1036 Ganymed, an Amor asteroid near the Earth. Observations were made on the day when simultaneous observations were possible from September to November 2011. Measured distances of 1036 Ganymed were 0.394 AU on Sept. 26, 0.365 AU on Oct. 11, and 0.340 AU on Oct. 25, respectively, which were within the error range as compared with the measured distances proposed by the US Jet Propulsion Laboratory. The 1036 Ganymed showed a tilting motion during the observation period, and the tangential angular velocities were measured at $0.037-0.052^{{\prime {\prime}}\;sec^{-1}$. Through this study, it was shown that the simultaneous observations among educational astronomical observations can obtain distance measurements with an error range of about 5% for asteroids near 0.4 AU. And it expected to be used as a research & education program emphasizing collaborative observation activities based on a network between observatories.
Keywords
Near-Earth Asteroid; distance; geocentric parallax; astronomical observatory; simultaneous observation;
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Times Cited By KSCI : 1  (Citation Analysis)
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