Astronomy:34 Circe
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Short description: Main-belt asteroid
.png) A three-dimensional model of 34 Circe based on its light curve | |
| Discovery | |
|---|---|
| Discovered by | J. Chacornac |
| Discovery date | April 6, 1855 |
| Designations | |
Designation | (34) Circe |
| Pronunciation | /ˈsɜːrsiː/[1] |
| Named after | Circe |
| 1965 JL | |
| Minor planet category | Main belt |
| Adjectives | Circean /sərˈsiːən/[2] |
| Orbital characteristics[3] | |
| Epoch November 4, 2013 (JD 2456600.5) | |
| |{{{apsis}}}|helion}} | 2.967739 AU |
| |{{{apsis}}}|helion}} | 2.406230 AU |
| 2.686984 AU | |
| Eccentricity | 0.1045 |
| Orbital period | 4.40 a (1607.332 d) |
| Average Orbital speed | 18.12 km/s |
| Mean anomaly | 39.80474° |
| Inclination | 5.498° |
| Longitude of ascending node | 184.44157° |
| 330.2330° | |
| Physical characteristics | |
| Dimensions | 113.02 ± 4.90 km[4] |
| Mass | (3.66 ± 0.03) × 1018 kg[4] |
| Mean density | 4.83 ± 0.63 g/cm3[4] |
| ~0.0317 m/s² | |
| ~0.0600 km/s | |
| Rotation period | 0.5063 d (12.15 h) [3] |
| Albedo | 0.0541 [3] |
| Physics | ~172 K |
Spectral type | C |
| Absolute magnitude (H) | 8.51 |
Circe, minor planet designation 34 Circe, is a large, very dark main-belt asteroid. It was discovered by French astronomer J. Chacornac on April 6, 1855, and named after Circe, the bewitching queen of Aeaea island in Greek mythology.
The spectrum of this object matches a C-type asteroid, suggesting a carbonaceous composition. It has a cross-section size of 113 km and is orbiting the Sun with a period of 4.40 years. Photometric observations of this asteroid made during 2007 at the Organ Mesa Observatory in Las Cruces, New Mexico gave an asymmetrical bimodal light curve with a period of 12.176 ± 0.002 hours and a brightness variation of 0.17 ± 0.02 in magnitude.[5] The spectra of the asteroid displays evidence of aqueous alteration.[6]
References
- ↑ "Circe". Circe. Oxford University Press. http://www.lexico.com/definition/Circe.
- ↑ Circean (3rd ed.), Oxford University Press, September 2005, http://oed.com/search?searchType=dictionary&q=Circean (Subscription or UK public library membership required.)
- ↑ 3.0 3.1 3.2 Yeomans, Donald K., "34 Circe", JPL Small-Body Database Browser (NASA Jet Propulsion Laboratory), https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=34, retrieved 2013-12-21.
- ↑ 4.0 4.1 4.2 Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science 73 (1): 98–118, doi:10.1016/j.pss.2012.03.009, Bibcode: 2012P&SS...73...98C. See Table 1.
- ↑ Pilcher, Frederick (September 2008), "Period Determinations for 26 Proserpina, 34 Circe 74 Galatea, 143 Adria, 272 Antonia, 419 Aurelia, and 557 Violetta", The Minor Planet Bulletin 35 (3): 135–138, Bibcode: 2008MPBu...35..135P.
- ↑ Fornasier, S. et al. (February 1999), "Spectroscopic comparison of aqueous altered asteroids with CM2 carbonaceous chondrite meteorites", Astronomy and Astrophysics Supplement 135: 65−73, doi:10.1051/aas:1999161, Bibcode: 1999A&AS..135...65F, https://ui.adsabs.harvard.edu/link_gateway/1999A&AS..135...65F/PUB_PDF.
External links
- 34 Circe at AstDyS-2, Asteroids—Dynamic Site
- 34 Circe at the JPL Small-Body Database
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