Summanus
11885 Summanus is a dark asteroid and large near-Earth object of the Apollo group. It was discovered by astronomers with the Spacewatch programm at Kitt Peak Observatory on 25 September 1990. The object has a rotation period of 7.3 hours and measures approximately 1.3 kilometers in diameter. It was named after Summanus, the Roman deity of nocturnal lightning and thunder.
Apollo
観測回数: 397
11885 Summanus is a dark asteroid and large near-Earth object of the Apollo group. It was discovered by astronomers with the Spacewatch programm at Kitt Peak Observatory on 25 September 1990. The object has a rotation period of 7.3 hours and measures approximately 1.3 kilometers in diameter. It was named after Summanus, the Roman deity of nocturnal lightning and thunder.
軌道パラメータ
半長軸
1.703 AU
離心率
0.4746
近日点
0.895 AU
遠日点
2.511244 AU
軌道傾斜角
19.43°
公転周期
— yr
暦元
2461200.5
平均近点角
325.32°
Orbit diagram
The Sun sits at the focus (orange). Earth's orbit is the grey circle at 1 AU. The red dot marks the object's position at the catalog epoch.
物理パラメータ
直径
1.298 km
アルベド
0.033
密度
— g/cm³
自転周期
— h
絶対等級
18.52
軌道品質
RMS
0.48297
状態コード
0
軌道ID
—