Astronomy:244 Sita
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_Sita.png) 3D model based on lightcurve data | |
| Discovery | |
|---|---|
| Discovered by | Johann Palisa |
| Discovery date | 14 October 1884 |
| Designations | |
| (244) Sita | |
| Pronunciation | /ˈsiːtə/ |
| Named after | Sita |
| A884 TA, 1900 UA 1957 KT, 1976 HY 1979 FL3 | |
| Minor planet category | main-belt |
| Orbital characteristics[1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 130.93 yr (47824 d) |
| |{{{apsis}}}|helion}} | 2.47317 astronomical unit|AU (369.981 Gm) |
| |{{{apsis}}}|helion}} | 1.87531 AU (280.542 Gm) |
| 2.17424 AU (325.262 Gm) | |
| Eccentricity | 0.13749 |
| Orbital period | 3.21 yr (1,171.0 d) |
| Mean anomaly | 46.3767° |
| Mean motion | 0° 18m 26.737s / day |
| Inclination | 2.84423° |
| Longitude of ascending node | 208.982° |
| 166.029° | |
| Physical characteristics | |
| Mean diameter | 10.95±0.8 km[1] 11 km[2] |
| Mass | ~2×1015 (estimate) |
| Mean density | ~2.7 g/cm3 (estimate)[3] |
| Rotation period | 129.51 h (5.396 d) |
| Geometric albedo | 0.1941±0.033[1] 0.194[2] |
| S[4] | |
| 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.[1] 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.[5]
This minor planet is orbiting the Sun at a distance of 2.17 astronomical unit|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.[1] It is spinning slowly, completing a rotation about its axis once every 129.056 ± 0.021 h (5.377 ± 0.001 d).[6]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 "244 Sita". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=244;cad=1.
- ↑ 2.0 2.1 "Supplemental IRAS Minor Planet Survey". http://www.psi.edu/pds/archive/astdata04/simps04/diamalb.tab.
- ↑ G. A. Krasinsky; E. V. Pitjeva; M. V. Vasilyev; E. I. Yagudina (2002). "Hidden Mass in the Asteroid Belt". Icarus 158 (1): 98–105. doi:10.1006/icar.2002.6837. Bibcode: 2002Icar..158...98K.
- ↑ PDS spectral class data
- ↑ Schmadel, Lutz (5 August 2003). Dictionary of Minor Planet Names. Springer Science & Business Media. ISBN 9783540002383. https://books.google.com/books?id=VoJ5nUyIzCsC&dq=Sita&pg=PA36.
- ↑ 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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