(81) Terpsichore ( lat. Terpsichore ) - an asteroid of the main belt , which belongs to the dark spectral class C. It was discovered on September 30, 1864 by the German astronomer Ernst Tempel at the Marseille Observatory and named after Terpsichore , the muse of dance in ancient Greek mythology [1] .
| (81) Terpsichore | |
|---|---|
| Asteroid | |
| Opening | |
| Discoverer | Ernst Tempel |
| Place of discovery | Marseilles |
| Discovery date | September 30, 1864 |
| Eponym | Terpsichore |
| Alternative notation | 1936 QR; 1936 RK; 1974 LF; A909 AA |
| Category | Main ring |
| Orbital characteristics | |
| Age of March 14, 2012 JD 2456000.5 | |
| Eccentricity ( e ) | 0,2073016 |
| Semimajor axis ( a ) | 427.402 million km (2,8570076 AU ) |
| Perihelion ( q ) | 338.801 million km (2,2647454 AU) |
| Aphelion ( Q ) | 516.003 million km (3,4492698 AU) |
| Circulation Period ( P ) | 1763.866 days (4.829 g. ) |
| Average orbital speed | 17.43 km / s |
| Inclination ( i ) | 7,80081 ° |
| Longitude node (Ω) | 1,04432 ° |
| Perihelion Argument (ω) | 51.45938 ° |
| Median Anomaly ( M ) | 176.32598 ° |
| physical characteristics | |
| Diameter | 119.08 km |
| Weight | 1,8⋅10 18 kg |
| Density | 2,000 g / cm³ |
| Acceleration of gravity on the surface | 0,0333 m / s² |
| 2nd space speed | 0.0630 km / s |
| Rotation period | 10.943 h |
| Spectral class | C (Cb) |
| Apparent magnitude | 13.49 m (current) |
| Absolute magnitude | 8.48 m |
| Albedo | 0,0505 |
| Average surface temperature | 165 K (−108 ° C ) |
| Current distance from the sun | 2.274 a. e. |
| Current distance from earth | 2.777 a. e. |
The orbit of the asteroid Terpsichore and its position in the solar system
The diameter of the asteroid was determined after analyzing the results obtained using the infrared space laboratory IRAS [2] . The results of the analysis of the light curve changes carried out in 2007 showed a rotation period of 11.027 ± 0.010 hours [3] . The Japanese infrared satellite Akari detected the presence of hydrated minerals on Terpsichore [4] .
See also
- List of asteroids ( 1-100 )
- Classifications of Minor Planets
Notes
- ↑ Schmadel, Lutz D. Dictionary of Minor Planet Names . - Fifth Revised and Enlarged Edition. - B. , Heidelberg, N. Y .: Springer, 2003 .-- P. 23. - ISBN 3-540-00238-3 .
- ↑ Edward F. Tedesco. The supplemental IRAS minor planet survey // The Astronomical Journal . - IOP Publishing , 2002. - Vol. 123 . - P. 1056-1085 .
- ↑ Fauerbach, M .; Bennett, Thomas; Marks, Scott A. Lightcurve Results for 81 Terpsichore, 242 Kriemhild 503 Evelyn, 522 Helga, and 578 Happelia (Eng.) // The Minor Planet Bulletin : journal. - Association of Lunar and Planetary Observers 2007. - Vol. 34 . - P. 57-58 .
- ↑ Fumihiko Usui et al. AKARI / IRC near-infrared asteroid spectroscopic survey: AcuA-spec , 17 December 2018