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m moved S/2005 (2003 EL61) 1toHi'iaka (moon): now has a name
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restore article now that it's a named moon
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[[Image:2003EL61art.jpg||right|thumb|An artist's impresion of [[Haumea (dwarf planet)|Haumea]] and its moons [[Namaka (moon)|Namaka]] and Hiʻiaka.]] |
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#redirect [[Haumea (dwarf planet)]] |
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'''Hiʻiaka''' ({{pron-en|hiːʔiːˈɑːkə}}, [[Hawaiian language|Hawaiian]] {{IPAlink|hiʔiˈaka}}) is the outer moon of the [[dwarf planet]] [[Haumea (dwarf planet)|Haumea]]. Its [[provisional designation]] was '''S/2005 ({{mp|2003 EL|61}}) 1'''. |
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==Discovery and Naming== |
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Hiʻiaka, at first nicknamed Rudolph by its discovery team, was the first [[satellite]] discovered around Haumea. It orbits once every 49.12 ±0.03 days at a distance of 49,500 ±400 km, with an eccentricity of 0.050 ±0.003 and an inclination of 234.8 ±0.3° [1]. Mutual occultations occurred in [[1999]] and will not occur again until [[2138]]. |
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==Size and Brightness== |
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Measured brightness is 5.9 ±0.5% translating into the diameter about 22% of its primary, or in the range of 350 km, assuming similar albedo. To put this in perspective, this moon would be the fifth largest asteroid after [[1 Ceres]], [[2 Pallas]], [[4 Vesta]], and [[10 Hygiea]] if it were in the [[asteroid belt]]. |
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==Mass== |
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Only the total mass of the system is known, but assuming the moon has the same density and albedo as the primary, their magnitude difference (3.3) can be used to estimate the mass of the [[satellite]] as 1% of the mass of Haumea. |
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{{Satellites of Haumea}} |
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Hiʻiaka (Template:Pron-en, Hawaiian Error using {{IPA symbol}}:『hiʔiˈaka』not found in list) is the outer moon of the dwarf planet Haumea. Its provisional designation was S/2005 (2003 EL61) 1.
Hiʻiaka, at first nicknamed Rudolph by its discovery team, was the first satellite discovered around Haumea. It orbits once every 49.12 ±0.03 days at a distance of 49,500 ±400 km, with an eccentricity of 0.050 ±0.003 and an inclination of 234.8 ±0.3° [1]. Mutual occultations occurred in 1999 and will not occur again until 2138.
Measured brightness is 5.9 ±0.5% translating into the diameter about 22% of its primary, or in the range of 350 km, assuming similar albedo. To put this in perspective, this moon would be the fifth largest asteroid after 1 Ceres, 2 Pallas, 4 Vesta, and 10 Hygiea if it were in the asteroid belt.
Only the total mass of the system is known, but assuming the moon has the same density and albedo as the primary, their magnitude difference (3.3) can be used to estimate the mass of the satellite as 1% of the mass of Haumea.
