Jupiter Data

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

Bulk parameters

Mass                         1.8986e27 kg        317.83
GM                           126.686e6 km3/s2    317.8
Equatorial radius               71,492 km         11.21
Polar radius                    66,854 km         10.52
Flattening                   64.874e-3            19.09
Mean density                     1,326 kg/m3       0.240
Moment of inertia coefficient    0.254             0.768
J2                            14.75e-3            13.611
Surface gravity (equator)        23.12 m/s2        2.364
Escape velocity                   59.5 km/s        5.32
Internal heat generation        400e15 W

Orbital parameters

Semimajor axis                 778.3e6 km          5.203
Sidereal period              4,332.589 d          11.862
Tropical period              4,330.595 d          11.857
Eccentricity                   0.04845             2.901
Inclination                      1.305 deg
Synodic period                  398.88 d
Mean orbital velocity            13.07 km/s        0.439

Radiative properties

Bond albedo                       0.70             1.82
Visual geometric albedo           0.52             1.42
Visual magnitude V(1,0)          -9.40
Solar irradiance                   51. W/m2        0.037
Black-body temperature            90.6 K           0.366

Spin properties*

Epoch                           1994.0
North pole (RA and Dec)         268.04 deg / 64.49 deg
Obliquity                         3.13 deg
Argument of prime meridian      354.77 deg at epoch
Sidereal rotation rate         870.536 deg/d
Sidereal rotation period        9.9249 h

Jovian Magnetosphere

Dipole strength                   4.28 gauss-Rj3
Dipole tilt to spin axis           9.6 deg
Longitude of tilt                201.7 deg
Dipole offset                    0.131 Rj
Offset vector                     -8.0 deg / 148.57 deg

Jovian Atmosphere

Surface pressure                 >>100 bars
Average temperature               ~129 K
Temperature at 1 bar              ~165 K
Density at 1 bar                 ~0.16 kg/m3
Wind speeds                  up to 150 m/s, below 30 deg latitude
                              up to 40 m/s, above 30 deg latitude
Scale height                        27 km
Mean molecular weight             2.22 g/mol
Composition:
  Hydrogen           (H2)      89%
  Helium             (He)      11%
  Methane            (CH4)     ~2000 ppm
  Ammonia            (NH3)     ~200 ppm
  Hydrogen Deuteride (HD)      20 ppm
  Ethane             (C2H6)    ~5 ppm
  Water              (H2O)     1ppm
Aerosols:  Ammonia ice; water ice; ammonia hydrosulfide

Osculating Orbital Elements

Epoch                     JD 2449360.5
Mean distance                   5.2028 AU
Eccentricity                    0.0483
Inclination                       1.30 deg
Longitude of ascending node     100.47 deg
Longitude of perihelion          15.68 deg
Mean longitude at epoch         212.86 deg