Astronomy:72 Feronia
.png) A three-dimensional model of 72 Feronia based on its light curve. | |
| Discovery | |
|---|---|
| Discovered by | Christian Heinrich Friedrich Peters |
| Discovery date | May 29, 1861 |
| Designations | |
| (72) Feronia | |
| Pronunciation | /fɛˈroʊniə/[1] |
| Named after | Feronia |
| Minor planet category | Main belt |
| Adjectives | Feronian |
| Orbital characteristics | |
| Epoch December 31, 2006 (JD 2454100.5) | |
| |{{{apsis}}}|helion}} | 2.539 astronomical unit|AU (379.8 Gm) |
| |{{{apsis}}}|helion}} | 1.993 AU (298.1 Gm) |
| 2.266 AU (339.0 Gm) | |
| Eccentricity | 0.121 |
| Orbital period | 1,246.123 days (3.41 a) |
| Mean anomaly | 146.950° |
| Inclination | 5.417° |
| Longitude of ascending node | 208.137° |
| 102.608° | |
| Physical characteristics | |
| Dimensions | 83.95±4.02 km[2] |
| Mass | (3.32±8.49)×1018 kg[2] |
| Mean density | 10.71±27.44 g/cm3[2] |
| Rotation period | 8.09068 h[3] |
| Pole ecliptic latitude | 287 or 102[3] |
| Pole ecliptic longitude | −39 or −55[3] |
| Geometric albedo | 0.063[4] |
| TDG[5] | |
| Absolute magnitude (H) | 8.94 |
72 Feronia (minor planet designation: 72 Feronia) is a quite large and dark main belt asteroid. It was the first asteroid discovery by C. H. F. Peters, on May 29, 1861,[6] from Hamilton College, New York State. It was initially thought that Peters had merely seen the already known asteroid 66 Maja, but T.H. Safford showed that it was a new body. Safford named it after Feronia, a Roman fertility goddess.[7]
This asteroid is orbiting the Sun with a period of 3.41 years, having a semimajor axis of 2.266 astronomical unit|AU and an eccentricity of 0.121. The orbital plane is inclined by an angle of 5.4° to the plane of the ecliptic. This is a spectral type TDG asteroid with a cross-section size of 84 km. The asteroid has an estimated rotation period of 8.09 h. Hanuš et al. (2013) gives two possible solutions for the pole in ecliptic coordinates: (λ1, β1) = (287°, −39°) or (λ1, β1) = (102°, −55°). The estimated mass of 72 Feronia, and hence the density, has a large margin of error.[3]
References
- ↑ Noah Webster (1884) A Practical Dictionary of the English Language
- ↑ 2.0 2.1 2.2 Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science 73: pp. 98–118, doi:10.1016/j.pss.2012.03.009, Bibcode: 2012P&SS...73...98C. See Table 1.
- ↑ 3.0 3.1 3.2 3.3 Hanuš, J. et al. (September 2013), "Sizes of main-belt asteroids by combining shape models and Keck adaptive optics observations", Icarus 226 (1): 1045−1057, doi:10.1016/j.icarus.2013.07.023, Bibcode: 2013Icar..226.1045H.
- ↑ "Asteroid Data Sets". http://www.psi.edu/pds/resource/albedo.html.
- ↑ *JPL Small-Body Database Browser
- ↑ Sheehan, William (1999), "Christian Heinrich Friedrich Peters", Biographical Memoirs, 76, National Academies Press, p. 289, ISBN 0309064341, https://books.google.com/books?id=4D-OIyTLoO0C&oi=fnd&pg=PA289.
- ↑ Schmadel, Lutz (2003). Dictionary of minor planet names (fifth ed.). Germany: Springer. p. 22. ISBN 3-540-00238-3. https://books.google.com/books?id=KWrB1jPCa8AC&pg=PA22. Retrieved 2008-12-31.
External links
- 72 Feronia at AstDyS-2, Asteroids—Dynamic Site
- 72 Feronia at the JPL Small-Body Database
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