34 Circe

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34 Circe
34Circe (Lightcurve Inversion).png
A three-dimensional model of 34 Circe based on its light curve
Discovery
Discovered by J. Chacornac
Discovery date6 April 1855
Designations
Designation
(34) Circe
Pronunciation /ˈsɜːrsiː/ [1]
Named after
 Circe
1965 JL
Main belt
Adjectives Circean /sərˈsiːən/ [2]
Orbital characteristics [3]
Epoch 21 November 2025 (JD 2461000.5)
Aphelion 2.975 AU
Perihelion 2.401 AU
2.688 AU
Eccentricity 0.107
4.407 yr (1609.636 d)
Average orbital speed
18.12 km/s
305.209°
Inclination 5.496°
184.294°
329.414°
Jupiter  MOID 2.023 AU
TJupiter 3.358
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
0.5063 d (12.15 h) [3]
Albedo 0.0541 [3]
Temperature ~172 K
Spectral type
 C
8.51

    34 Circe is a large, very dark main-belt asteroid. It was discovered by French astronomer J. Chacornac on 6 April 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

    1. ↑ "Circe". Lexico UK English Dictionary. Oxford University Press. Archived from the original on 22 March 2020.
    2. ↑ "Circean" . Oxford English Dictionary (Online ed.). Oxford University Press.(Subscription or participating institution membership required.)
    3. 1 2 3 Yeomans, Donald K., "34 Circe", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory , retrieved 21 December 2013.
    4. 1 2 3 Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, 73 (1): 98–118, arXiv: 1203.4336 , Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009, S2CID   119226456. See Table 1.
    5. ↑ 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.
    6. ↑ 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 .
    The shape of 34 Circe. 34 Circe shape.png
    The shape of 34 Circe.
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