704 Interamnia
From Freepedia
| Discovery A | |
|---|---|
| Discoverer | Vincenzo Cerulli |
| Discovery date | October 2, 1910 |
| Alternate designations | 1910 KU; 1952 MW B |
| Category | Main belt |
| Orbital elements C | |
| Eccentricity (e) | 0.149 |
| Semi-major axis (a) | 458.187 Gm (3.063 AU) |
| Perihelion (q) | 389.910 Gm (2.606 AU) |
| Aphelion (Q) | 526.464 Gm (3.519 AU) |
| Orbital period (P) | 1957.827 d (5.36 a) |
| Mean orbital speed | 16.92 km/s |
| Inclination (i) | 17.285° |
| Longitude of the ascending node (Ω) | 280.422° |
| Argument of perihelion (ω) | 95.654° |
| Mean anomaly (M) | 204.093° |
| Physical characteristics | |
| Dimensions | 316.6 km |
| Mass | 3.3×1019 kg |
| Density | 2.0 ? g/cm³ |
| Surface gravity | 0.0885 m/s² |
| Escape velocity | 0.1674 km/s |
| Rotation period | 0.364 d 1 |
| Spectral class | F |
| Absolute magnitude | 5.94 |
| Albedo | 0.075 2 |
| Mean surface temperature | ~160 K |
704 Interamnia (in'-tur-am'-nee-a, Latin Interamnium) is a very large asteroid with a diameter of 350 kilometres. Its mean distance from Sun is 3.067 (AU). It was discovered on October 2, 1910 by Vincenzo Cerulli, and named after the Latin name for Teramo, Italy, where Cerulli worked.
Interamnia is the sixth largest known asteroid within Jupiter's orbit and was discovered surprisingly late for such a large object.
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