Namaka (moon)

Namaka

In this photo taken by the Hubble Space Telescope, Namaka is the faint spot near the bottom, directly below Haumea (center).
Discovery
Discovered by	Michael E. Brown, Chad Trujillo, David Rabinowitz, et al.
Discovery date	30 June 2005
Designations
Designation	Haumea II
Pronunciation	/nɑːˈmɑːkə/ Hawaiian: [naːˈmɐkə]
Alternative names	(136108) 2003 EL61 II S/2005 (2003 EL61) 2
Orbital characteristics[1]
Epoch JD 2454615.0
Semi-major axis	25657±91 km[1]
Eccentricity	0.249±0.015 (in 2009; variable)
Orbital period (sidereal)	18.2783±0.0076 d[1]
Mean anomaly	178.5°±1.7°
Inclination	113.013°±0.075° 13.41°±0.08° relative to Hiʻiaka (in 2008; variable)
Longitude of ascending node	205.016°±0.228°
Argument of perihelion	178.9°±2.3°
Satellite of	Haumea
Physical characteristics
Mean radius	~85 km (if albedo is same as primary's 0.7±0.1)
Mass	(1.79±1.48)×1018 kg[1] (0.05% the mass of Haumea)
Mean density	(assumed to be near 1 g/cm3)
Synodic rotation period	?
Albedo	0.8±0.2[2][3]
Temperature	32±3 K
Apparent magnitude	21.9 (4.6 difference from primary's 17.3)[2]

Namaka is the smaller, inner moon of the trans-Neptunian dwarf planet Haumea. Discovered in 2005, it is named after Nāmaka, the goddess of the sea in Hawaiian mythology and one of the daughters of Haumea. Namaka is notable for its unusual, highly-perturbed orbit that is heavily influenced by the larger, outer moon Hi'iaka.