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Perdita (moon) facts for kids

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Perdita
Discovery
Discovered by Erich Karkoschka / Voyager 2
Discovery date May 18, 1999 (in images dating back to January 18, 1986)
Orbital characteristics
Mean orbit radius
76,417 ± 1 km
Eccentricity 0.0012 ± 0.0005
0.638021 ± 0.000013 d
Inclination 0.0 ± 0.3° (to Uranus' equator)
Satellite of Uranus
Physical characteristics
Dimensions 30 × 30 × 30 km
Mean radius
15 ± 3 km
~2,800 km²
Volume ~14,000 km³
Mass ~0.18×1017 kg
Mean density
~1.3 g/cm³ assumed
~0.0047 m/s2
~0.011 km/s
synchronous
zero
Albedo 0.08 ± 0.01
Temperature ~64 K
Perdita feat
Perdita

Perdita is a closer moon to Uranus. Perdita's discovery was not simple. The first pictures of Perdita were taken by the Voyager 2 spacecraft in 1986, but it was not recognized from the photographs for more than a decade. In 1999, the moon was noticed by Erich Karkoschka and reported. But because no further pictures could be taken to confirm its existence, it was thought to be non-existent in 2001. However, in 2003, pictures taken by the Hubble Space Telescope managed to pick up an object where Perdita was supposed to be, finally confirming its existence.

Following its discovery in 1999, Perdita was given the designation of S/1986 U 10. It was named after the daughter of Leontes and Hermione in William Shakespeare's play The Winter's Tale. The moon is also designated Uranus XXV.

Perdita belongs to Portia Group of moons, which also includes Bianca, Cressida, Desdemona, Portia, Juliet, Cupid, Rosalind and Belinda. These moons have similar orbits and photometric properties. Unfortunately, other than its orbit, radius of 15 km and geometric albedo of 0.08 almost nothing is known about it.

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