Egeria
13 Egeria is a large main-belt G-type asteroid. It was discovered by Annibale de Gasparis on 2 November 1850. Egeria was named by Urbain Le Verrier, whose computations led to the discovery of Neptune, after the mythological nymph Egeria of Aricia, Italy, the wife of Numa Pompilius, second king of Rome.
asteroid
発見日: 1850-11-21
観測回数: 3,875
13 Egeria is a large main-belt G-type asteroid. It was discovered by Annibale de Gasparis on 2 November 1850. Egeria was named by Urbain Le Verrier, whose computations led to the discovery of Neptune, after the mythological nymph Egeria of Aricia, Italy, the wife of Numa Pompilius, second king of Rome.
軌道パラメータ
半長軸
2.576 AU
離心率
0.0846
近日点
2.358 AU
遠日点
2.79393 AU
軌道傾斜角
16.53°
公転周期
4.1342 yr
暦元
2461200.5
平均近点角
88.62°
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
202.636 km
アルベド
0.049
密度
— g/cm³
自転周期
7.045 h
絶対等級
6.92
軌道品質
RMS
0.50391
状態コード
0
軌道ID
—
