Their semi-major axes (distances from Jupiter) range between 22,800,000 and 24,100,000 km (the same range as the Carme group), their inclinations between 144.5° and 158.3°, and their eccentricities between 0.25 and 0.43.
Core members of the group include (from the biggest to the smallest):
The International Astronomical Union (IAU) reserves names ending in -e for all retrograde moons, including this group's members.
Origin[change | change source]
The Pasiphaë group is believed to have been formed when Jupiter captured an asteroid which broke up after a collision. The original asteroid was not disturbed heavily: the original body is calculated to have been 60 km in diameter, about the same size as Pasiphaë; Pasiphaë has 99% of the original body's mass. However, if Sinope belongs to the group, the amount is much smaller, 87%.
References[change | change source]
- Scott S. Sheppard, David C. Jewitt, Carolyn Porco Jupiter's outer satellites and Trojans, In: Jupiter. The planet, satellites and magnetosphere. Edited by Fran Bagenal, Timothy E. Dowling, William B. McKinnon. Cambridge planetary science, Vol. 1, Cambridge, UK: Cambridge University Press, ISBN 0-521-81808-7, 2004, p. 263 - 280 Full text(pdf).
- Sheppard, Scott S.; Jewitt, David C. (May 5, 2003). "An abundant population of small irregular satellites around Jupiter". Nature 423: 261–263. doi:10.1038/nature01584. However, Nesvorny 2003, while concurring on the Ananke and Carme groups, lists only Megaclithe for Pasiphaë's group