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20000 Varuna

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20000 Varuna
Discovery A (http://cfa-www.harvard.edu/iau/lists/NumberedMPs.html)
Discoverer R. McMillan (Spacewatch)
Discovery date 28 November 2000
Alternate
designations
2000 WR106 B (http://cfa-www.harvard.edu/iau/MPDes.html)
Category Kuiper belt
Orbital elements C (http://asteroid.lowell.edu/)
Epoch 14 July 2004 (JD 2453200.5)
Eccentricity (e) 0.051
Semi-major axis (a) 6451.398 Gm (43.129 AU)
Perihelion (q) 6120.810 Gm (40.915 AU)
Aphelion (Q) 6781.985 Gm (45.335 AU)
Orbital period (P) 103440.6 days (283.20 years)
Mean orbital speed 4.53 km/s
Inclination (i) 17.2
Longitude of the
ascending node
(Ω)
97.296
Argument of
perihelion
(ω)
271.631
Mean anomaly (M) 89.673
Physical characteristics
Dimensions 530 +90
−110
km radius
Mass ~5.9 × 1020 kg
Density ~1 g/cm
Surface gravity 0.15 m/s
Escape velocity 0.39 km/s
Rotation period 0.26432 days (3.17 hours)
Spectral class
Absolute magnitude 3.7
Albedo 0.038 +0.022
−0.010
Mean surface
temperature
~43 K

20000 Varuna ("VAR oo na") is a Kuiper Belt object about 1060 kilometers in diameter, estimated from a combination of thermal and optical measurements.

Little is known about Varuna. It has a rotational period of approximately 3.17 hours (or 6.34 hours, depending on whether the light curve is single or double-peaked). It has a density of approximately 1 g/cm3 (as dense as water), which implies that it may not be a fully solid body [1] (http://www.ifa.hawaii.edu/~jewitt/papers/VARUNA2/JS2002.pdf).

It is named after the Hindu god Varuna. It previously had the provisional designation 2000 WR106.


External links

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The minor planets
Vulcanoids | Main belt | Groups and families | Near-Earth objects | Jupiter Trojans
Centaurs | Trans-Neptunians | Damocloids | Comets | Kuiper belt | Oort cloud
(For other objects and regions, see: Binary asteroids, Asteroid moons and the Solar system)
(For a complete listing, see: List of asteroids. For pronunciation, see: Pronunciation of asteroid names.)
bg:20000 Варуна

de:Varuna (Asteroid) fr:20000 Varuna nl:Varuna (planetode) sl:20000 Varuna

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