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147 Protogeneia
From Wikipedia, the free encyclopedia
| Discovery[1] and Designation | |
|---|---|
| Discovered by: | Lipót Schulhof |
| Discovery date: | July 10, 1875 |
| Alternative names: [2] | |
| Minor planet category: | Main belt |
| Orbital characteristics[3] | |
| Epoch December 31, 2006 (JD 2454100.5) | |
| Aphelion distance: | 484.856 Gm (3.241 AU) |
| Perihelion distance: | 452.926 Gm (3.028 AU) |
| Semi-major axis: | 468.891 Gm (3.134 AU) |
| Eccentricity: | 0.034 |
| Orbital period: | 2026.831 d (5.55 a) |
| Avg. orbital speed: | 16.82 km/s |
| Mean anomaly: | 185.625° |
| Inclination: | 1.935° |
| Longitude of ascending node: | 248.729° |
| Argument of perihelion: | 106.744° |
| Physical characteristics | |
| Dimensions: | 132.9 km |
| Mass: | 2.5×1018 kg |
| Mean density: | 2.0 g/cm³ |
| Equatorial surface gravity: | 0.0371 m/s² |
| Equatorial Escape velocity: | 0.0703 km/s |
| Sidereal rotation period: | ? d |
| Axial tilt: | ?° |
| Pole ecliptic latitude: | ? |
| Pole ecliptic longitude: | ? |
| Geometric albedo: | 0.10 |
| Temperature: | ~157 K |
| Spectral type: | C |
| Absolute magnitude: | 8.27 |
147 Protogeneia is a large main belt asteroid. It has a dark surface and probably a primitive composition of carbonaceous material.
It was discovered by Lipót Schulhof on July 10, 1875, his only asteroid discovery. It is named after Protogeneia, one of the daughters of King Erechtheus in Greek mythology.
There is one reported stellar occultation by Protogeneia, on May 28, 2002 from Texas.
| Minor planets | ||
|---|---|---|
| Previous minor planet | 147 Protogeneia | Next minor planet |
| List of asteroids | ||
Vulcanoids · Near-Earth asteroids · Main belt · Jupiter Trojans · Centaurs · Damocloids · Comets · Trans-Neptunians (Kuiper belt • Scattered disc • Oort cloud)
For other objects and regions, see Asteroid groups and families, Binary asteroids, Asteroid moons and the Solar System.
For a complete listing, see List of asteroids. See also Pronunciation of asteroid names and Meanings of asteroid names.