81 Terpsichore

81 Terpsichore
Discovery
Discovered byErnst Wilhelm Tempel
Discovery dateSeptember 30, 1864
Designations
MPC designation(81) Terpsichore
Pronunciation/
SIK-ə-ree
Named after
Terpsichore
Main belt
Orbital characteristics
Epoch December 31, 2006 (JD 2454100.5)
Aphelion516.955 Gm (3.456 AU)
Perihelion337.132 Gm (2.254 AU)
427.044 Gm (2.855 AU)
Eccentricity0.211
1761.647 d (4.82 a)
17.43 km/s
149.581°
Inclination7.809°
1.497°
50.234°
Physical characteristics
Dimensions121.77 ± 2.34 km[1]
Mass(6.19 ± 5.31) × 1018 kg[1]
Mean density
6.54 ± 5.62 g/cm3[1]
10.943 hr
0.051 [2]
C
8.48

Terpsichore (/ SIK-ə-ree; minor planet designation: 81 Terpsichore) is a large and very dark main-belt asteroid. It has most probably a very primitive carbonaceous composition. It was found by the prolific comet discoverer Ernst Tempel on September 30, 1864.[3] It is named after Terpsichore, the Muse of dance in Greek mythology.

Photometric observations of the minor planet in 2011 gave a rotation period of 10.945±0.001 h with an amplitude of 0.09±0.01 in magnitude. This result is consistent with previous determinations.[4] Two stellar occultation events involving this asteroid were observed from multiple sites in 2009. The resulting chords matched a smooth elliptical cross-section with dimensions of 134.0±4.0 km × 108.9±0.7 km.[5]

In popular culture

A space station orbiting 81 Terpsichore is the main setting in the science fiction story The Dark Colony (Asteroid Police Book 1) by Richard Penn.

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粵語: 司舞星
中文: 司舞星