131 Vala
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Discovery[1]
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| Discovered by | Christian Heinrich Friedrich Peters |
| Discovery date | May 24, 1873 |
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Designations
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| Alternate name(s) | |
| Minor planet category |
Main belt[1] |
| Epoch December 31, 2006 (JD 2454100.5) | |
| Aphelion | 388.147 Gm (2.595 AU) |
| Perihelion | 339.381 Gm (2.269 AU) |
| Semi-major axis | 363.764 Gm (2.432 AU) |
| Eccentricity | 0.06679 |
| Orbital period | 1384.969 d (3.79 a) |
| Average orbital speed | 19.08 km/s |
| Mean anomaly | 101.289° |
| Inclination | 4.958° |
| Longitude of ascending node | 65.772° |
| Argument of perihelion | 159.106° |
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Physical characteristics
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| Dimensions | 40.4 km[1] |
| Mass | 6.9×1016 kg |
| Mean density | ? g/cm³ |
| Equatorial surface gravity | 0.0113 m/s² |
| Escape velocity | 0.0214 km/s |
| Rotation period | 5.18 hr[1] |
| Albedo | ? |
| Temperature | ~178 K |
| Spectral type | Xc |
| Absolute magnitude (H) | 10.03[1] |
131 Vala is an inner main-belt asteroid. It was discovered by C. H. F. Peters on May 24, 1873, and named after Völva, a prophetess in Norse mythology.[2] One observation of an occultation of a star by Vala is from Italy (May 26, 2002).
On 2028-Apr-05, Vala will pass 0.0276 AU (4,130,000 km; 2,570,000 mi) from asteroid 2 Pallas.[3]
[edit] References
- ^ a b c d e "JPL Small-Body Database Browser: 131 Vala". Jet Propulsion Laboratory. 2011-10-20 last obs (arc=138 years). http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=131. Retrieved 2011-12-07.
- ^ Schmadel, Lutz D.; International Astronomical Union (2003). Dictionary of minor planet names. Berlin; New York: Springer-Verlag. p. 27. ISBN 978-3-540-00238-3. http://books.google.com/books?id=KWrB1jPCa8AC&pg=PA27. Retrieved 9 September 2011.
- ^ "JPL Close-Approach Data: 131 Vala". 2011-10-20 last obs (arc=138 years). http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=131;cad=1#cad. Retrieved 2011-12-07.
[edit] External links
- Orbital simulation from JPL (Java) / Ephemeris
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