- 81 Terpsichore
Infobox Planet | discovery=yes | physical_characteristics = yes | bgcolour=#FFFFC0
name=81 Terpsichore
discoverer=Ernst Wilhelm Tempel
discovered=September 30 ,1864
alt_names=
mp_category=Main belt
epoch=December 31 ,2006 (JD 2454100.5)
semimajor=427.044 Gm (2.855 AU)
perihelion=337.132 Gm (2.254 AU)
aphelion=516.955 Gm (3.456 AU)
eccentricity=0.211
period=1761.647 d (4.82 a)
inclination=7.809°
asc_node=1.497°
arg_peri=50.234°
mean_anomaly=149.581°
avg_speed=17.43 km/s
dimensions=119.1 km
mass=1.8e|18 kg
density=? g/cm³
surface_grav=0.0333 m/s²
escape_velocity=0.0630 km/s
rotation=? d
spectral_type=C
abs_magnitude=8.48
albedo=0.051 [ [http://www.psi.edu/pds/resource/albedo.html Asteroid Data Sets ] ]
single_temperature=~165 K81 Terpsichore "(tərp-sik'-ə-ree," IPAEng|tɚrpˈsɪkəri) is a large and very dark
main belt asteroid . It has most likely a very primitive carbonaceous composition. It was found by the prolificcomet discovererErnst Tempel onSeptember 30 ,1864 . It is named afterTerpsichore , theMuse ofdance inGreek mythology .References
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