A three-dimensional model o 13 Egeria based on its licht curve. | |
Discovery | |
---|---|
Discovered bi | Annibale de Gasparis |
Discovery date | November 2, 1850 |
Designations | |
Pronunciation | /ᵻˈdʒɪəriə/ i-JEER-ee-ə |
Alternative names | none |
Minor planet category | Main belt |
Orbital chairactereestics[1] | |
Epoch July 14, 2004 (JD 2453200.5) | |
Aphelion | 417.953 Gm (2.794 AU) |
Perihelion | 352.719 Gm (2.358 AU) |
385.336 Gm (2.576 AU) | |
Eccentricity | 0.085 |
Orbital period | 1,509.977 d (4.13 a) |
Average orbital speed | 18.56 km/s |
Mean anomaly | 339.787° |
Inclination | 16.540° |
Longitude o ascendin node | 43.305° |
Argument o perihelion | 81.401° |
Pheesical chairacteristics | |
Dimensions | 214.8×192[2] [nae in citation given] 207.6 ± 8.3 km (IRAS)[1] |
Mass | 1.63×1019 kg[3] |
Mean density | 3.46±0.79 g/cm³[3] |
Surface gravity | ≈0.0580 m/s² |
Escape velocity | ≈0.1098 km/s |
0.2935 d[4] (7.045 h)[1] | |
Albedo | 0.083[1][5] |
Temperatur | ~174 K |
Spectral teep | G-type asteroid[1] |
Apparent magnitude | 9.71 tae 12.46[6] |
6.74[1] | |
13 Egeria is a lairge main-belt G-type asteroid.[7]