Jupiter  
A composite Cassini image of Jupiter. The dark spot is the shadow of Europa.
Designations
Pronunciation
Adjective Jovian
Orbital characteristics
Epoch J2000
Aphelion 816,520,800 km (5.458104 AU)
Perihelion 740,573,600 km (4.950429 AU)
Semi-major axis 778,547,200 km (5.204267 AU)
Eccentricity 0.048775
Orbital period
  • 4,332.59 days
  • 11.8618 yr
  • 10,475.8 Jupiter solar days
Synodic period 398.88 days
Average orbital speed 13.07 km/s
Mean anomaly 18.818°
Inclination
  • 1.305° to Ecliptic
  • 6.09° to Sun's equator
  • 0.32° to Invariable plane
Longitude of ascending node 100.492°
Argument of perihelion 275.066°
Satellites 66
Physical characteristics
Mean radius 69,911 ± 6 km
Equatorial radius
  • 71,492 ± 4 km
  • 11.209 Earths
Polar radius
  • 66,854 ± 10 km
  • 10.517 Earths
Flattening 0.06487 ± 0.00015
Surface area
  • 6.1419×10
  • 121.9 Earths
Volume
  • 1.4313×10
  • 1321.3 Earths
Mass
  • 1.8986×10
  • 317.8 Earths
  • 1/1047 Sun
Mean density 1.326 g/cm
Equatorial surface gravity 24.79 m/s
2.528 g
Escape velocity 59.5 km/s
Sidereal rotation
period
9.925 h (9 h 55 m 30 s)
Equatorial rotation velocity 12.6 km/s
45,300 km/h
Axial tilt 3.13°
North pole right ascension 268.057°
17 h 52 min 14 s
North pole declination 64.496°
Albedo 0.343 (Bond)
0.52 (geom.)
Surface temp.
   1 bar level
   0.1 bar
min mean max
165 K
112 K
Apparent magnitude -1.6 to -2.94
Angular diameter 29.8" — 50.1"
Atmosphere
Surface pressure 20–200 kPa (cloud layer)
Scale height 27 km
Composition
89.8±2.0% hydrogen (H2)
10.2±2.0% helium
~0.3% methane
~0.026% ammonia
~0.003% hydrogen deuteride (HD)
0.0006% ethane
0.0004% water
Ices:
ammonia
water
ammonium hydrosulfide(NH4SH)

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Jupiter, which is released under the Creative Commons Attribution-Share-Alike License 3.0