_Sita.png) 3D model based on lightcurve data | |
| Discovery | |
|---|---|
| Discovered by | Johann Palisa |
| Discovery date | 14 October 1884 |
| Designations | |
| MPC designation | (244) Sita |
| Pronunciation | /ˈsiːtə/ |
| Named after | Sita |
| Alternative designations | A884 TA, 1900 UA 1957 KT, 1976 HY 1979 FL3 |
| Minor planet category | main-belt |
| Orbital characteristics | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 130.93 yr (47824 d) |
| Aphelion | 2.47317 AU (369.981 Gm) |
| Perihelion | 1.87531 AU (280.542 Gm) |
| Semi-major axis | 2.17424 AU (325.262 Gm) |
| Eccentricity | 0.13749 |
| Orbital period (sidereal) | 3.21 yr (1,171.0 d) |
| Mean anomaly | 46.3767° |
| Mean motion | 0° 18 26.737 / day |
| Inclination | 2.84423° |
| Longitude of ascending node | 208.982° |
| Argument of perihelion | 166.029° |
| Physical characteristics | |
| Mean diameter | 10.95±0.8 km 11 km |
| Mass | ~2×10 (estimate) |
| Mean density | ~2.7 g/cm (estimate) |
| Synodic rotation period | 129.51 h (5.396 d) |
| Geometric albedo | 0.1941±0.033 0.194 |
| Spectral type | S |
| Absolute magnitude (H) | 11.9 |
244 Sita is a background asteroid from the inner region of the asteroid belt, approximately 11 kilometers (6.8 miles) in diameter. It was discovered on 14 October 1884, by an Austrian astronomer Johann Palisa in the Vienna Observatory and was named for the Hindu deity Sita.
This minor planet is orbiting the Sun at a distance of 2.17 AU with an eccentricity of 0.137 and an orbital period of 3.21 yr. The orbital plane is tilted at an angle of 2.84° to the plane of the ecliptic. It is spinning slowly, completing a rotation about its axis once every 129.056 ± 0.021 h (5.377 ± 0.001 d).
References
- ^ "244 Sita". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 12 May 2016.
- ^ "Supplemental IRAS Minor Planet Survey". Archived from the original on 23 June 2006.
- G. A. Krasinsky, E. V. Pitjeva, M. V. Vasilyev, E. I. Yagudina (2002). "Hidden Mass in the Asteroid Belt". Icarus. 158 (1): 98–105. Bibcode:2002Icar..158...98K. doi:10.1006/icar.2002.6837.
- PDS spectral class data
- Schmadel, Lutz (5 August 2003). Dictionary of Minor Planet Names. Springer Science & Business Media. ISBN 9783540002383 – via Google Books.
- Vander Haagen, Gary A. (April 2010). "Lightcurve and H-G Parameters for Slow Rotator 244 Sita". Bulletin of the Minor Planets Section of the Association of Lunar and Planetary Observers. 37 (2): 44–45. Bibcode:2010MPBu...37...44V.
External links
- The Asteroid Orbital Elements Database
- Minor Planet Discovery Circumstances
- 244 Sita at AstDyS-2, Asteroids—Dynamic Site
- 244 Sita at the JPL Small-Body Database
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