20000 Varuna Facts for Kids

Quick facts for kids
20000 Varuna
Discovery
Artist's idea of what Varuna may look like
Discovered by	R. McMillan (Spacewatch)
Discovery date	28 November 2000
Designations
MPC designation	20000 Varuna
Alternative names	2000 WR₁₀₆
Minor planet category	TNO (cubewano)
Orbital characteristics
Epoch 14 July 2004 (JD 2453200.5)
Aphelion	6 781.985 Gm (45.335 AU)
Perihelion	6 120.810 Gm (40.915 AU)
Semi-major axis	6 451.398 Gm (43.129 AU)
Eccentricity	0.051
Orbital period	103 440.6 d (283.20 a)
Average orbital speed	4.53 km/s
Mean anomaly	89.673°
Inclination	17.2°
Longitude of ascending node	97.296°
Argument of perihelion	271.631°
Physical characteristics
Dimensions	800 km (avg of thermals) (scalene ellipsoid)?
Mass	≈3.7×10²⁰? kg
Mean density	0.992 g/cm³
Surface gravity	0.15 m/s²
Escape velocity	0.39 km/s
Sidereal rotation period	0.132 16 d (3.17 h)
Albedo	0.037–0.26
Temperature	≈43–41 K
Spectral type	(moderately red) B-V=0.93 V-R=0.64
Apparent magnitude	19.9 (opposition)
Absolute magnitude (H)	3.7

20000 Varuna is a big Kuiper belt object (KBO). It could be a dwarf planet. Before it was named Varuna, it had the provisional designation 2000 WR₁₀₆.

Varuna is named after the Hindu deity Varuṇa.

Physical characteristics

Varuna completes one rotation in about 3.17 hours (or 6.34 hours, depending on whether the light curve is single or double-peaked). Given the fast rotation, which is not common for objects so big, Varuna is thought to be a stretched spheroid, with a density around 1g/cm³ (close to the density of water).

The surface of Varuna is somewhat red and small amounts of water ice have been found on its surface.

Site updated Reretrived on 2006-07-10

The Solar System

Sun • Heliosphere	Planets ☾ = moon(s) ∅ = rings		Mercury	Venus	Earth ☾	Mars ☾

			Jupiter ☾ ∅	Saturn ☾ ∅	Uranus ☾ ∅	Neptune ☾ ∅

	Dwarf planets		Ceres	Pluto ☾	Haumea ☾	Makemake

			Eris ☾

	Small Solar System bodies	Asteroids (minor planets)	Groups and families: Vulcanoids · Near-Earth asteroids · Asteroid belt Jupiter Trojans · Centaurs · Neptune Trojans · Asteroid moons · Meteoroids · Pallas · Juno · Vesta · Hygiea · Interamnia · Europa
		Asteroids (minor planets)	See also the list of asteroids.

		Trans- Neptunians	Kuiper belt – Plutinos: Orcus · Ixion – Cubewanos: Varuna · Quaoar · Huya
		Trans- Neptunians	Scattered disc: Sedna

		Comets	Periodic comets and non-periodic comets Damocloids · Oort cloud
See also the list of solar system objects

Images for kids

Varuna was discovered with the Spacewatch 0.9-meter telescope at the Kitt Peak National Observatory
Artist's impression of Varuna depicting its reddish color and ellipsoidal shape
Varuna compared to the Earth and the Moon
Art concept of Varuna, incorporating some of what is known including its shape and coloration from spectral analysis

20000 Varuna facts for kids

Physical characteristics

Images for kids

See also