Pluto's Known Satellites

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 Pluto Satellite Data 
Name                           a     i         e     Peri    Node    M        Period  mag    H      Size  Year
                              (km)   (deg)           (deg)   (deg)   (deg)    (days)         (mag)  (km)
__________________________________________________________________________________________________ 
P1    Charon     S/1978 P1    19591  0.080   0.0002  146.106 26.928  131.070  6.387   16.8   1.0    1207  1978 
P5    Styx       S/2012 P1    42393  0.080   0.0006  330.244 26.956  194.546  20.16   27.0          20    2012 
P2    Nix        S/2005 P2    48671  0.000   0.0000  324.463 203.400 284.405  24.85   23.7          70    2005 
P4    Kerberos   S/2011 P1    57729  0.426   0.0000  160.629 305.871 161.061  32.17   26.0          25    2011 
P3    Hydra      S/2005 P1    64698  0.304   0.0056  153.307 113.173 326.678  38.20   23.3          90    2005 


a - The mean semi-major axis.
i - The mean inclination.
e - The mean eccentricity.
Peri - The argument of Pariaphis.
Node - The longitude of the ascending node.
M - The mean anomaly.
Period - The time of one revolution around Neptune.
mag - The optical magnitude of the object (R-band).
H - The absolute magnitude of the object.
Size - The diameter of the object.
Year - The year of discovery.

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Scott S. Sheppard's Home Page
e-mail: ssheppard at carnegiescience.edu (replace the "at" with @)

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See info on all the planetary satellites at The Giant Planet Satellite Page