22 Kalliope Guide, Meaning , Facts, Information and Description
| Orbital characteristics 1 | |
|---|---|
| Orbit type | Main belt |
| Semimajor axis | 2.908 AU |
| Perihelion distance | 2.608 AU |
| Aphelion distance | 3.207 AU |
| Orbital period | 4.96 years |
| Inclination | 13.71° |
| Eccentricity | 0.103 |
| Physical characteristics 1 | |
| Diameter | 181 km |
| Mass 4 | 7.36 × 1018 kg |
| Density 4 | 2.37 g/cm³ |
| Rotation period 3 | 4.148 hours |
| Spectral class | M |
| Abs. magnitude | 6.45 |
| Albedo 5 | 0.142 |
| History 2 | |
| Discoverer | J. R. Hind, 1852 |
| Satellites | |
| Name | Linus |
22 Kalliope ("kuh LYE uh pee") is a very large Main belt asteroid discovered by J. R. Hind on November 16, 1852. It is named after Calliope, the Greek Muse of epic poetry.
Kalliope is 181 km in diameter, and is a M-type asteroid, indicating fairly pure nickel-iron composition. However, recent measurements show that 22 Kalliope's density is only 2.37 g/cm³, so it must contain considerable amount of other materials.
In 2001, astronomers at the Keck telescope discovered a small moon orbiting Kalliope. It has been named Linus after the mythological figure. Linus is about 38 km in diameter and orbits about 1,000 km from Kalliope. It may be impact ejecta from a collision with Kalliope.