Pluto Data

(The second value represents the quantity as a fraction of the terrestrial value.)

Bulk parameters

Mass                           12.5e21 kg          0.0021
GM                                 830 km3/s2      0.0021
Volumetric mean radius            1137 km          0.1785
Mean density                      2050 kg/m3       0.3714
Surface gravity                   0.66 m/s2        0.0675
Escape velocity                    1.1 km/s        0.0983

Orbital parameters

Semimajor axis                5.9135e9 km         39.53
Sidereal period               90.465e3 d         247.68
Tropical period               90.588e3 d         248.02
Eccentricity                    0.2482            14.862
Inclination                      17.15 deg
Synodic period                  366.73 d
Mean orbital velocity             4.75 km/s        0.1594
Perihelion                    4.4458e9 km         30.22
Aphelion                      7.3812e9 km         48.53

Radiative properties

Bond albedo                      0.145             0.377
Visual geometric albedo            0.3             0.817
Solar irradiance                   0.9 W/m2        0.0007
Black-body temperature            42.7 K           0.1653

Spin properties

Epoch                           1994.0
North pole (RA and Dec)         312.95 deg / 9.07 deg
Obliquity                       122.51 deg
Argument of prime meridian      331.16 deg at epoch
Sidereal rotation rate     -56.3623195 deg/d
Sidereal rotation period        6.3872 d

Plutonian Atmosphere

Surface pressure                    ~3 microbar
Average temperature                ~50 K
Scale height                       ~60 km
Mean molecular weight        ~16 to 25 g/mol
Composition:
  Methane        (CH4)
  Nitrogen       (N2)

Osculating Orbital Elements

Epoch                     JD 2449920.5
Mean distance                 39.81227 AU
Eccentricity                 0.2547023
Inclination                   17.12143 deg
Longitude of ascending node   110.3817 deg
Longitude of perihelion       224.6287 deg
Mean longitude at epoch      232.59497 deg
Daily motion               0.003923546 deg

Charon

Mean distance from Pluto      19.405e3 km
Sidereal orbit period            6.387 d
Orbital inclination              96.56 deg
Orbital eccentricity               0.0
Equatorial radius                  586 km
Mass                            1.7e21 kg
Mean density                      1800 kg/m3
Surface gravity                   0.21 m/s2
Escape velocity                   0.58 km/s
Albedo                           0.375

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