308 Polyxo

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308 Polyxo
Discovery A
Discoverer A. Borrelly
Discovery date March 31, 1891
Alternate
designations
B
Category Main belt
Orbital elements C
Epoch 30 January 2005 (JD 2453400.5)
Eccentricity (e) 0.038
Semi-major axis (a) 411.542 Gm (2.751 AU)
Perihelion (q) 395.843 Gm (2.646 AU)
Aphelion (Q) 427.242 Gm (2.856 AU)
Orbital period (P) 1666.571 d (4.56 a)
Mean orbital speed 17.96 km/s
Inclination (i) 4.364°
Longitude of the
ascending node
(Ω)
181.927°
Argument of
perihelion
(ω)
109.987°
Mean anomaly (M) 248.11°
Physical characteristics D
Dimensions 141.0 km
Mass unknown
Density unknown
Surface gravity unknown
Escape velocity unknown
Rotation period unknown
Spectral class T
Absolute magnitude 8.17
Albedo (geometric) unknown
Mean surface
temperature
unknown
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308 Polyxo is a very large Main belt asteroid. It is classified as a rare T-type asteroid.

It was discovered by A. Borrelly on March 31, 1891 in Marseilles.


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