Callirrhoe's measured albedo is around 5.2%, which means its diameter is 9.6 kilometers.

Origin

Callirrhoe probably did not form near Jupiter but was captured by Jupiter later. Callirrhoe is believed to be a fragment from a captured asteroid along with other Pasiphae group satellites.

However, it falls into a different color class than Pasiphae and could therefore have been captured by Jupiter independently of the Pasiphae group.

Exploration

thumb|left|upright|Callirrhoe imaged by the [[LORRI (New Horizons)|LORRI instrument aboard New Horizons]]

The New Horizons spacecraft flew through the Jovian system in early 2007, using Jupiter for a gravity assist to shorten its journey to Pluto. As a navigation exercise, New Horizons imaged Callirrhoe from a distance on 10 January 2007 using its LORRI instrument.

Notes

References

</references>

  • 17th Moon of Jupiter Discovered
  • Spacewatch S/1999 J 1
  • Spacewatch discovery picture