Callirrhoe (moon)


Callirrhoe ( Jupiter XVII) is one of the outermost moons of Jupiter.


Callirrhoe was discovered on 6 October 1999 by the astronomer Timothy B. Spahr, Jim V. Scotti, Robert S. McMillan, Jeff A. Larsen, Joe Montani, Arianna E. Gleason and Tom Gehrels within the Spacewatch program. First, we held the celestial bodies for an asteroid (1999 UX18 ). Timothy B. Spahr found on 18 July 2000 that it was another moon of Jupiter, then the provisional designation S/1999 J received 1.

It was named after the moon Kallirhoe, the mother of Ganymede in Greek mythology.

Path data

Callirrhoe orbits Jupiter at an average distance of 24,102,000 km in about 759 days. The track has an eccentricity of 0.283. With an inclination of 147.1 °, the track is retrograde, that is, the moon moves against the direction of rotation of Jupiter around the planet.

Callirrhoe is attributed due to their web properties of the Pasiphae group.

Physical data

Callirrhoe has an average diameter of about 7 km. The density is estimated very roughly to 2.6 g / cm ³, for the moon is believed to be predominantly composed of silicate rock. Callirrhoe has a very dark surface with an albedo of 0.04, which means that only 4% of the incident sunlight is reflected. Their apparent brightness is 20.8 m.