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＊ 小惑星2957番達雄 ＊
Discovered 1934-Feb-05 by Reinmuth, K. at Heidelberg. Asteroid 2957 Tatsuo is a main belt asteroid that was discovered on February 5, 1934 by K. Reinmuth at Heidelberg. The semi-major axis is 2.89 AU and the eccentricity is 0.092 and the inclination is 8.71 degrees. I observed this asteroid on 3 nights during June 2004. A period of 7.32 hours was derived however this result is very uncertain as the data was very noisy and the lightcurve incomplete. 2957 Tatsuo Orbital characteristics Epoch 4-Nov-2013 (2456600.5 JD) Apoapsis 3.297 AU = 4.932×108 km Periapsis 2.741 AU = 4.1×108 km Semi-Major axis 3.019 AU = 4.516×108 km Eccentrity 0.0921 Orbital Period 1915.85 days = 5.25 years Avg. Orbital Speed 17.11 km/s Inclination 8.7139 ° Longitude of ascending node 249.43 ° Argument of perihelion 62.873 ° Physical characteristics Mean diameter 25.6 km Rotation Period 6.819 hours Albedo 0.224 |
2015年10月14日 16.0等
