Source: Researched & partly provided by NASA Exploration

Dimensions: ˜1,960 × 1,518 × 996 km (Keck) Distance from Sun: 50 AU Elliptical orbit of the Sun: Satellite: 2 - Hiiaka and Namaka Location: Kuiper belt
Discovered By:	Mike Brown et al, Ortiz et al (unofficial)
Date of Discovery:	28.12.2004 07.2005
Average Distance from the Sun
Re-Classification Names: MPC Designation	2003 EL61 136108 Haumea
Perihelion (closest)	5,184 Gm 34.721 AU
Aphelion (farthest)	7,710 Gm (passed 1992) 51.544AU
Argument of Perihelion	239.18°
Semi-major Axis	6.452 Gm 43.132 AU
Eccentricity	0.195 01
Orbital Period	103. 468 d (283.28 yr)
Orbital Resonance with Neptune	12:7
Average Orbital Velocity	4.484 km/s
Mean Anomally	202.67°
Inclination (tilt)	28.22°
Longitude of Ascending Node	121.10°
Equatorial Radius	±
Polar Radius
Flattening
Mass	(4.006 ± 0.040)×10²¹ kg
Mean Radius	~718 km 575+125 -50 km (Spitzer) 762 ± 83 km(Hershel)
Surface Area	˜2×10⁷ km
Equatorial Surface Gravity	0.44 m/s²
Mean Density	2.6 - 3.3 g/cm (Low)
Escape Velocity	0.84 km/s
Sidereal Rotation Period	0.163 146 ± 0.000 004 d (3.915 5 ± 0.000 1 h
Albedo	0.7 ± 0.1 0.84 +0.1 -0.2 0.70–75
Apparent Magnitude	17.3 (opposition)
Absolute Magnitude (H)	0.002 ± 0.4
Angular Size
Temperature Mean	<50 K
Spectra Data Type	(Neutral) B-V=0.64, V-R=0.33 B₀-V₀=0.646
	Silicate minerals - Olivine, Pyroxene Rocky objects thin layer of ice, thick ice mantle
Category:	A Pluton (based on similar orbit to Pluto)

Dwarf Planet Data

Haumea, named after the Hawaiian goddess of childbirth

An artist's illustration of Haumea with its moons
Hiiaka and Namaka. The moons are actually farther away from Haumea than pictured here
Photos Source: Wikipedia

Orbits of Haumea (yellow) and Pluto (red), relative to that of Neptune (grey), as of May 2009)