Actaea

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Actaea
Actaea is the single known natural satellite of the cubewano 120347 Salacia. Its diameter is estimated 300 km, which is ⅓ of the diameter of Salacia; thus, Salacia and Actaea are viewed by some to be a binary object. Actaea has the same color as Salacia, supporting the assumption of equal albedos. It has been calculated that the Salacia system should have undergone enough tidal evolution to circularize their orbits, which is consistent with the low measured eccentricity, but that the primary need not have been tidally locked. The low density calculated for the system (1,16 g/cm3) implies that both Salacia and Actaea consist chiefly of water ice. Actaea (moon) - Wikipedia, the free encyclopedia
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Short Description Actaea is the single known natural satellite of the cubewano 120347 Salacia. Its diameter is estimated 300 km, which is ⅓ of the diameter of Salacia; thus, Salacia and Actaea are viewed by some to be a binary object. Actaea has the same color as Salacia, supporting the assumption of equal albedos. It has been calculated that the Salacia system should have undergone enough tidal evolution to circularize their orbits, which is consistent with the low measured eccentricity, but that the primary need not have been tidally locked. The low density calculated for the system (1,16 g/cm3) implies that both Salacia and Actaea consist chiefly of water ice. Actaea (moon) - Wikipedia, the free encyclopedia
Discovered by Keith S. Noll, Harold F. Levison, Denise C. Stephen, William M. Grundy
Discovery date 21 Jul 2006
Type Moon
AddInfo Salacia I
Satellite of Salacia
Minor planet number (120347) Salacia I
Orbit Prograde
Rotation Direct
Apoapsis 04 5 666 km
Periapsis 04 5 572 km
Semi-major axis 04 5 619 ± 87 km
Distance from Sun 02 41.860 au /1
Eccentricity 0.008 4
Orbital period 5.49380 days
Orbital speed  0.05 km/s
Diameter/Size 03 303 ± 35 km
Mass 1019×1.86 kg
Density 01 1.16 (+0.59/-0.36) g/cm3
Escape velocity 02 50 m/s
Albedo geometric 0.035
Absolute magnitude 1.9
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