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Circe (/ˈsɜːrs/ SUR-see; 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.

34 Circe
34Circe (Lightcurve Inversion).png
A three-dimensional model of 34 Circe based on its light curve
Discovery
Discovered byJ. Chacornac
Discovery dateApril 6, 1855
Designations
MPC designation(34) Circe
Named after
Circe
1965 JL
Main belt
Orbital characteristics[1]
Epoch November 4, 2013 (JD 2456600.5)
Aphelion2.967739 AU
Perihelion2.406230 AU
2.686984 AU
Eccentricity0.1045
4.40 a (1607.332 d)
18.12 km/s
39.80474°
Inclination5.498°
184.44157°
330.2330°
Physical characteristics
Dimensions113.02 ± 4.90 km[2]
Mass(3.66 ± 0.03) × 1018 kg[2]
Mean density
4.83 ± 0.63 g/cm3[2]
~0.0317 m/s²
~0.0600 km/s
0.5063 d (12.15 h) [1]
Albedo0.0541 [1]
Temperature~172 K
Spectral type
C
8.51

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.[3] The spectra of the asteroid displays evidence of aqueous alteration.[4]

ReferencesEdit

  1. ^ a b c Yeomans, Donald K., "34 Circe", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 2013-12-21.
  2. ^ a b c Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, 73, pp. 98–118, arXiv:1203.4336, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009. See Table 1.
  3. ^ 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), pp. 135–138, Bibcode:2008MPBu...35..135P.
  4. ^ Fornasier, S.; et al. (February 1999), "Spectroscopic comparison of aqueous altered asteroids with CM2 carbonaceous chondrite meteorites", Astronomy and Astrophysics Supplement, 135: 65−73, Bibcode:1999A&AS..135...65F, doi:10.1051/aas:1999161.

External linksEdit