Pluto + Satellite
| Hydra (moon) |
Albedo
0.04
Apoapsis
65,102 km (4.3518e-4 AU, 40,452.507 mi)
Color
#AAAAAA
Date of discovery
15 May 2005
Equatorial radius
37 km (22.991 mi)
Inclination
0.00384 rad (0.22 °, 0.244 grad)
Lunar mass
5.0e+16 kg (6.80429e-7 M☾, 8.36681e-9 M⊕)
Mean temperature
44 K (-229.15 °C, -380.47 °F, 79.2 °R)
Orbital eccentricity
0.005
Order
3
Periapsis
64,458 km (4.30875e-4 AU, 40,052.344 mi)
Semi-major axis
64,780 km (4.33028e-4 AU, 40,252.426 mi)
Sidereal period
38.206 da (0.105 a)
Discoverer
Hubble Space Telescope Pluto Companion Search Team +
Member of
Moon +
Primary
Pluto +
Categories Astronomy +, Moon +, Pluto +, Solar system +
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