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#REDIRECT [[2003 EL61]] |
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[[Image:2003EL61moon1.jpg|right|thumb|An artist's impresion of S/2005 ({{mp|2003 EL|61}}) 1]] |
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S/2005 ({{mp|2003 EL|61}}) 1 is one of the two [[Satellite]]s of {{mp|2003 EL|61}} |
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==Discovery and Naming== |
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S/2005 ({{mp|2003 EL|61}}) 1 ([[provisional designation]]; nicknamed Rudolph by the Caltech team) is the first [[satellite]] discovered around {{mp|2003 EL|61}}. It orbits {{mp|2003 EL|61}} 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 {{mp|2003 EL|61}}. |
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{{Satellites 0f 2003 EL61}} |
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