153 Hilda
From Wikipedia, the free encyclopedia
| Orbital characteristics 1 | |
|---|---|
| Orbit type | Main belt (Hilda) |
| Semimajor axis | 3.973 AU |
| Perihelion distance | 3.412 AU |
| Aphelion distance | 4.533 AU |
| Orbital period | 7.92 years |
| Inclination | 7.83° |
| Eccentricity | 0.141 |
| Physical characteristics 1 | |
| Diameter | 170.6 km |
| Rotation period 3 | 5.11 hours |
| Spectral class | C |
| Abs. magnitude | 7.48 |
| Albedo 4 | 0.062 |
| History 2 | |
| Discoverer | J. Palisa, 1875 |
153 Hilda is a very large asteroid in the outer Main belt. Because it is composed of primitive carbonaceous materials, it has a very dark surface.
Hilda gives its name to an asteroid group called Hilda asteroids (or shorter Hildas). It is not an asteroid family since the members are not physically related. Instead they are asteroids locked in a 2:3 orbital resonance with Jupiter.
It was discovered by J. Palisa on November 2, 1875.
Hilda was observed to occult a star on December 31, 2002 from Japan.
It has a very low-amplitude light curve indicating a spherical body.
|
|||||
