S/2003 J 2
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S/2003 J 2 is a natural satellite of Jupiter. It was discovered by a team of astronomers from the University of Hawaii led by Scott S. Sheppard, et al. in 2003. As of 2005, it is Jupiter's outermost known moon. S/2003 J 2 is about 2 kilometres in diameter, and orbits Jupiter at an average distance of 30,291 Mm in 1077.018 days, at an inclination of 176° to the ecliptic (152° to Jupiter's equator), in a retrograde direction and with an eccentricity of 0.188.
It seems to belong to a group all of its own, with semi-major axis ~30 Gm and inclination ~150°.
The limits of Jupiter's gravitational influence are defined by the Hill sphere, whose radius is
- <math>\approx a_j \sqrt[3]{\frac{m_j}{3 M_s}}<math>,
where <math>a_j<math> and <math>m_j<math> are Jupiter's semi-major axis and mass, and <math>M_s<math> is the Sun's mass. This comes out as about 52 gigametres. S/2003 J 2 reaches 36 Gm during its orbit; it is therefore possible that yet farther out moons of Jupiter are left to discover.
| Jupiter's natural satellites edit (https://academickids.com:443/encyclopedia/index.php?title=Template:Jupiter_Footer&action=edit) |
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| Metis | Adrastea | Amalthea | Thebe | Io | Europa | Ganymede | Callisto | Themisto | Leda | Himalia | Lysithea | Elara | S/2000 J 11 | Carpo | S/2003 J 12 | Euporie | S/2003 J 3 | S/2003 J 18 | Thelxinoe | Euanthe | Helike | Orthosie | Iocaste | S/2003 J 16 | Ananke | Praxidike | Harpalyke | Hermippe | Thyone | Mneme | S/2003 J 17 | Aitne | Kale | Taygete | S/2003 J 19 | Chaldene | S/2003 J 15 | S/2003 J 10 | S/2003 J 23 | Erinome | Aoede | Kallichore | Kalyke | Eurydome | S/2003 J 14 | Pasithee | Cyllene | Eukelade | S/2003 J 4 | Hegemone | Arche | Carme | Isonoe | S/2003 J 9 | S/2003 J 5 | Pasiphaė | Sinope | Sponde | Autonoe | Callirrhoe | Megaclite | S/2003 J 2 |
| Amalthea group | Galilean moons | Himalia group | Ananke group | Carme group | Pasiphaė group |