The moon was sometimes called Hestia, after the Greek goddess, from 1955 to 1975.
Dust produced from these collisions spreads throughout the Jovian system, with much of it ending up collecting on the surfaces of the Galilean moons. Roughly 50% of the dust from the Himalia group impacts Callisto, 20% is ejected from the system or absorbed by Jupiter, and the remainder impacts the other Galilean moons. However, an impact by an object the size of Dia would produce far more material than the calculated amount of ejected material needed to form the ring, although it is possible that a smaller, unknown moon may have been involved instead. Its spectrum has been remarked to be strikingly similar to that of the asteroid 52 Europa.
Himalia's rotational period is . Also in 2005, Christou tested several different masses of Himalia in a range of to investigate a hypothesis that it gravitationally scattered other members of the Himalia group, and the hypothesis was found plausible given the mass was on the higher end, which was consistent with Emelyanov's estimate. However a later study asserted that at least twice that mass was required to fully explain the dispersion of the group.
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External links
- "Himalia: Overview" by NASA's Solar System Exploration
- David Jewitt pages
- Jupiter's Known Satellites (by Scott S. Sheppard)
- Two Irregular Satellites of Jupiter (Himalia & Elara: Remanzacco Observatory: November 23, 2012)
