(399307) 1991 RJ2: A NEW NEA BINARY DISCOVERY.
| Autor: | Warner BD; Center for Solar System Studies - Palmer Divide Station, (CS3-PDS), 446 Sycamore Ave., Eaton, CO 80615 USA., Pollock JT; Department of Physics and Astronomy, Appalachian State University, Boone, NC USA., Reichart DE; Department of Physics and Astronomy, UNC-Chapel Hill, Chapel Hill, NC USA., Haislip JB; Department of Physics and Astronomy, UNC-Chapel Hill, Chapel Hill, NC USA., LaCluyze AP; Department of Physics and Astronomy, UNC-Chapel Hill, Chapel Hill, NC USA., Verveer A; Perth Observatory, Bickley, WA, AUSTRALIA., Spuck T; Perth Observatory, Bickley, WA, AUSTRALIA., Harris AW; MoreData!, La Cañada, CA USA. |
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| Jazyk: | angličtina |
| Zdroj: | The Minor planet bulletin [Minor Planet Bull] 2015 Jan-Mar; Vol. 42 (1), pp. 37-38. |
| Abstrakt: | Analysis of CCD photometric observations of the near-Earth asteroid (399307) 1991 RJ2 made in 2014 August-September show it to be a binary system with a primary period of 3.4907 ± 0.0002 h and orbital period of 15.917 ± 0.001 h. The depth of the secondary mutual event indicates a minimum effective diameter ratio (Ds/Dp) of 0.47 ± 0.02. The lightcurve showing the orbital period and mutual events indicates a slightly elongated (a/b ~ 1.07/1.0) satellite that is tidally-locked to the orbital period. |
| Databáze: | MEDLINE |
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