49 Pales
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Discovery[1]
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| Discovered by | Hermann Goldschmidt |
| Discovery site | Paris Observatory |
| Discovery date | September 19, 1857 |
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Designations
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| MPC designation | 49 |
| Named after | Pales |
| Minor planet category |
Main belt [2] |
| Epoch November 30, 2008 | |
| Ap | 3.8065 AU |
| Peri | 2.3813 AU |
| Semi-major axis | 3.09392 AU |
| Eccentricity | 0.230323 |
| Orbital period | 1987.75 days (5.44 years) |
| Mean anomaly | 274.69° |
| Inclination | 3.18° |
| Longitude of ascending node | 286.135° |
| Argument of peri | 109.804° |
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Physical characteristics
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| Dimensions | 149.80 ± 3.8 km Mean diameter[4] |
| Mass | 2.69×1018 kg[5] |
| Rotation period | 10.42 ± 0.02 hours [6] |
| Albedo | 0.0597 ± 0.003 [4] |
| Spectral type | C [7] |
| Absolute magnitude (H) | 7.8 [8] |
49 Pales (
/ˈpeɪliːz/) is a large, dark main-belt asteroid. It was discovered by Hermann Goldschmidt on September 19, 1857 from his balcony in Paris.[1]
The asteroid is named after Pales, the goddess of shepherds in Roman mythology. Since it was discovered on the same night as 48 Doris, geologist Élie de Beaumont suggested naming the two "The Twins".[9]
Pales has been studied by radar.[10]
[edit] References
- ^ a b "Discovery Circumstances: Numbered Minor Planets (1)-(5000)". IAU: Minor Planet Center. http://www.cfa.harvard.edu/iau/lists/NumberedMPs000001.html. Retrieved December 29, 2008.
- ^ "49 Pales". JPL Small-Body Database. Jet Propulsion Laboratory. http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=49+Pales. Retrieved December 29, 2008.
- ^ "(49) Pales". AstDyS. Italy: University of Pisa. http://hamilton.dm.unipi.it/astdys/index.php?pc=1.1.0&n=49. Retrieved December 29, 2008.
- ^ a b Tedesco et al. (2004). "Supplemental IRAS Minor Planet Survey (SIMPS)". IRAS-A-FPA-3-RDR-IMPS-V6.0. Planetary Data System. http://www.psi.edu/pds/resource/imps.html. Retrieved December 29, 2008.[dead link]
- ^ Jim Baer (2008). "Recent Asteroid Mass Determinations". Personal Website. http://home.earthlink.net/~jimbaer1/astmass.txt. Retrieved 2008-12-29.
- ^ Schober et al. (1979). "Photoelectric photometry and rotation periods of three large and dark asteroids - 49 Pales, 88 THISBE and 92 Undina". Astronomy and Astrophysics Supplement Series 36: 1–8. Bibcode 1979A&AS...36....1S.
- ^ Neese (2005). "Asteroid Taxonomy". EAR-A-5-DDR-TAXONOMY-V5.0. Planetary Data System. http://www.psi.edu/pds/resource/taxonomy.html. Retrieved December 27, 2008.[dead link]
- ^ Tholen (2007). "Asteroid Absolute Magnitudes". EAR-A-5-DDR-ASTERMAG-V11.0.. Planetary Data System. http://www.psi.edu/pds/resource/astermag.html. Retrieved December 29, 2008.[dead link]
- ^ Schmadel, Lutz (2003). Dictionary of minor planet names (fifth ed.). Germany: Springer. p. 19. ISBN 3-540-00238-3. http://books.google.com/?id=KWrB1jPCa8AC&pg=PA19. Retrieved 2008-12-29.
- ^ "Radar-Detected Asteroids and Comets". NASA/JPL Asteroid Radar Research. http://echo.jpl.nasa.gov/asteroids/. Retrieved 2011-10-30.
[edit] External links
- Orbital simulation from JPL (Java) / Ephemeris
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