308 Polyxo

308 Polyxo
Discovery
Discovered by A. Borrelly
Discovery date 31 March 1891
Designations
MPC designation (308) Polyxo
Named after
 Polyxo
Main belt
Orbital characteristics[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc 124.63 yr (45521 d)
Aphelion 2.85974 AU (427.811 Gm)
Perihelion 2.63975 AU (394.901 Gm)
2.74975 AU (411.357 Gm)
Eccentricity 0.040003
4.56 yr (1665.5 d)
17.96 km/s
70.4189°
0° 12m 58.158s / day
Inclination 4.36141°
181.727°
115.501°
Earth MOID 1.62746 AU (243.465 Gm)
Jupiter MOID 2.21024 AU (330.647 Gm)
Jupiter Tisserand parameter 3.341
Physical characteristics
Dimensions 140.69±3.8 km[1]
130 km[2]
12.029 h (0.5012 d)
0.0482±0.003
T
8.17

    308 Polyxo is a main-belt asteroid that was discovered by A. Borrelly on March 31, 1891, in Marseilles. It is classified as a rare T-type asteroid.

    Photometric measurements reported in 1983 give a rotation period of 12.03 hours and a brightness variation of 0.20 in magnitude. The adaptive optics instrument at the W. M. Keck Observatory shows an oblate object with a diameter of 130 km. The size ratio between the major and minor axes is 1.26 ± 0.11.[2]

    References

    1. 1 2 "308 Polyxo". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 11 May 2016.
    2. 1 2 Marchis, F.; et al. (November 2006), "Shape, size and multiplicity of main-belt asteroids. I. Keck Adaptive Optics survey", Icarus, 185 (1), pp. 39–63, Bibcode:2006Icar..185...39M, PMC 2600456 Freely accessible, PMID 19081813, doi:10.1016/j.icarus.2006.06.001, retrieved 2013-03-27.


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