22 Kalliope

Kalliope (minor planet designation: 22 Kalliope) is a large M-type asteroid and binary from the asteroid belt. It is named after Calliope, one of the
muses (epic poetry) from Greek Mythology. It has a small moon named Linus.
== Physical Characteristics ==
Kalliope is somewhat elongated and abou 166 km in diameter, and slightly asymmetric, as evidenced by resolved images taken with the VLT at the European Southern Observatory. Kalliope is an M-type, meaning that it is mostly comprised of iron, nickel, or other metals. Its density is about 3.4 g/cm3, which means that it is also made up of silicate rock too. Kalliope also has a low radar albedo, which is inconsistent with a purely metallic surface.
Lightcurve analysis indicates that Kalliope's pole most likely points towards ecliptic coordinates (β, λ) = (−23°, 20°) with a 10° uncertainty, which gives Kalliope an axial tilt of 103°. Kalliope's rotation is then slightly retrograde.
Between 2004 and 2021, 22 Kalliope has been observed to occult fifteen stars.
== Satellite ==
Main article: LinusKalliope has one known natural satellite, called Linus, (22) Kalliope I Linus or S/2001 (22) I. It is actually quite large for its size (about 28 km in diameter) and could be a large asteroid itself. Linus orbits at a distance of 1100 km from Kalliope's center. It was discovered on 29 August 2001 by Jean-Luc Margot and Michael E. Brown, while another team led by William Merline also independently detected the moon 3 days later.
Category:Asteroids
Category:Main Belt
Category:Other Spectral Types
Category:Geoasteroid
Category:Objects Not in Hydrostatic Equilibrium
Category:Objects with No Atmosphere
Category:Binary Asteroid
Category:Binary Object
Category:Named Objects
Category:Named Minor Planets
Category:Numbered Minor Planets
Category:Numbered Objects