64 Angelina
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| Discovery | |
|---|---|
| Discovered by: | Ernst Wilhelm Tempel |
| Discovery date: | March 4, 1861 |
| Alternative names: | |
| Minor planet category: | Main belt |
| Orbital characteristics | |
| Epoch December 31, 2006 (JD 2454100.5) | |
| Aphelion distance: | 451.375 Gm (3.017 AU) |
| Perihelion distance: | 351.784 Gm (2.352 AU) |
| Semi-major axis: | 401.580 Gm (2.684 AU) |
| Eccentricity: | 0.124 |
| Orbital period: | 1606.452 d (4.40 a) |
| Avg. orbital speed: | 18.11 km/s |
| Mean anomaly: | 107.758° |
| Inclination: | 1.308° |
| Longitude of ascending node: | 309.285° |
| Argument of perihelion: | 179.641° |
| Physical characteristics | |
| Dimensions: | 48x53 km |
| Mass: | ?×10? kg |
| Mean density: | ? g/cm³ |
| Equatorial surface gravity: | ? m/s² |
| Escape velocity: | ? km/s |
| Rotation period: | 0.365 d |
| Albedo: | 0.157 |
| Temperature: | ~170 K |
| Spectral type: | E |
| Absolute magnitude: | 7.67 |
64 Angelina is a medium-sized Main belt asteroid and is an uncommon E-type asteroid. It is the third largest E-type after 44 Nysa and 55 Pandora. It was formerly thought to be the largest of this class but recent work[1] has shown that its diameter is only a quarter of what was previously thought.
It was discovered on March 4, 1861 by a prolific comet discoverer, E. W. Tempel. It was first of his five asteroid discoveries.
E-type asteroids show unusual brightening when at close opposition to the Sun. This phenomenon is also known in Jupiter's moons Io, Ganymede and Europa, and also Saturn's moon Iapetus.
| Minor planets | ||
|---|---|---|
| Previous minor planet | 64 Angelina | 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.
