Origin of name
Ulysses first flew by Jupiter in April 1998 and made use of Jupiter's gravitational pull to be put in an orbit with a high inclination to the ecliptic. The 6.2 year orbit makes it possible for Ulysses to study the Sun's polar regions.
Cassini-Huygens passed by Jupiter in December 2000 at a distance of 137 Jupiter radii. The energy that Cassini gained from this gravity assist was used to reach Saturn in July 2004.
|Property||Unit||Value||Earth = 1|
|Equatorial radius, 1 bar level||km||71 492||11.209|
|Polar radius, 1 bar level||km||66 854||10.517|
|Volume (x1010)||km3||143 128||1321.33|
|Gravity at equator, 1 bar level||ms-2||24.79||2.530|
|Magnetic field at equator (x10-4)||T||4.28||14.03|
|Magnetic dipole moment (x1020)||Tm3||~ 1.55||~ 20 000|
|Tilt of dipole axis||°||9.6|
|Dipole field centre offset from planet centre (equatorial radii)||0.14|
|Number of natural satellites||63|
|Mean distance from the Sun (x106)||km||778.30|
|Mean distance from the Sun||AU||5.20|
|Sidereal orbit period||y||11.862|
| Sidereal rotation period |
System III (1965.0) coordinates
|Length of day||h||9.9259|
|Orbit inclination to Ecliptic||°||1.304|
|Mean orbital velocity||kms-1||13.07|
|Maximum orbital velocity||kms-1||13.72|
|Minimum orbital velocity||kms-1||12.44|
- Sidereal orbit period
The time taken by the planet to complete exactly one orbit around the Sun with respect to the celestial sphere.
- Sidereal rotation period
The time in which the planet rotates around its axis exactly 360° with respect to the celestial sphere.
- Length of a day
Defined as the time between two successive sunrises over the meridian.
- Magnetic dipole moment
Calculated as the ratio of the magnetic field strength at the equator divided by the cube of the equatorial radius.