Harman Patil (Editor)

106 Dione

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Discovered by  James Craig Watson
Minor planet category  Main belt
Aphelion  3.7032 AU (553.99 Gm)
Orbits  Sun
Discoverer  James Craig Watson
Discovery site  Detroit Observatory
Discovery date  10 October 1868
Observation arc  145.03 yr (52972 d)
Discovered  10 October 1868
Spectral type  G-type asteroid
Named after  Dione
Perihelion  2.64584 AU (395.812 Gm)
Similar  107 Camilla, 471 Papagena, 192 Nausikaa, 386 Siegena, 230 Athamantis

106 Dione is a large main-belt asteroid. It probably has a composition similar to 1 Ceres. It was discovered by J. C. Watson on October 10, 1868, and named after Dione, a Titaness in Greek mythology who was sometimes said to have been the mother of Aphrodite, the Greek goddess of love and beauty. It is listed as a member of the Hecuba group of asteroids that orbit near the 2:1 mean-motion resonance with Jupiter.

Dione was observed to occult a dim star on January 19, 1983, by observers in Denmark, Germany and the Netherlands. A diameter of 147 ± 3 km was deduced, closely matching the value acquired by the IRAS satellite.

Measurements made with the IRAS observatory give a diameter of 169.92 ± 7.86 km and a geometric albedo of 0.07 ± 0.01. By comparison, the MIPS photometer on the Spitzer Space Telescope gives a diameter of 168.72 ± 8.89 km and a geometric albedo of 0.07 ± 0.01. When the asteroid was observed occulting a star, the results showed a diameter of 176.7 ± 0.4 km.

Photometric observations of this asteroid collected during 2004–2005 show a rotation period of 16.26 ± 0.02 hours with a brightness variation of 0.08 ± 0.02 magnitude.

One of Saturn's satellites is also named Dione.


106 Dione Wikipedia