Calypso

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Calypso
Calypso is a moon of Saturn. Calypso is co-orbital with the moon Tethys, and resides in Tethys' trailing Lagrangian point (L5), 60 degrees behind Tethys. This relationship was first identified by Seidelmann et al. in 1981. The moon Telesto resides in the other (leading) Lagrangian point of Tethys, 60 degrees in the other direction from Tethys. Calypso and Telesto have been termed "Tethys trojans", by analogy to the trojan asteroids, and are half of the four presently known trojan moons. Calypso (moon) - Wikipedia, the free encyclopedia
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Short Description Calypso is a moon of Saturn. Calypso is co-orbital with the moon Tethys, and resides in Tethys' trailing Lagrangian point (L5), 60 degrees behind Tethys. This relationship was first identified by Seidelmann et al. in 1981. The moon Telesto resides in the other (leading) Lagrangian point of Tethys, 60 degrees in the other direction from Tethys. Calypso and Telesto have been termed "Tethys trojans", by analogy to the trojan asteroids, and are half of the four presently known trojan moons. Calypso (moon) - Wikipedia, the free encyclopedia
Discovered by Dan Pascu, P. Kenneth Seidelmann, William A. Baum, Douglas G. Currie
Discovery date March 13, 1980
Type Moon
AddInfo Saturn XIV / Tethys C
Satellite of Saturn
Orbit Prograde
Rotation Synchronous
Apoapsis 06 294 766 km
Periapsis 06 294 472 km
Semi-major axis 06 294 619 km
Distance from Sun 01 9.554 909 au /15b
Eccentricity 0.000 5
Orbital period 1.887 802 day
Orbital speed 02 11.35 km/s
Inclination to the equator 001.56°
Diameter/Size 02 21.4 ± 1.4 km
Dimensions 30.2 × 23 × 14 km
Mass 1015×2.547 7 kg
Density  0.5 g/cm3
Surface gravity  0.002 7 m/s2
Escape velocity 01 7.1 m/s
Rotation period 1.887 802 day
Axial tilt
Albedo Bond 0.70
Albedo geometric 1.34 ± 0.10
Temperature mean 02 75 K | −198 °C
Apparent magnitude 18.7
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