Harman Patil (Editor)

106 Dione

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Discovered by
James Craig Watson

Minor planet category
Main belt

3.7032 AU (553.99 Gm)


James Craig Watson

Discovery site
Detroit Observatory

Discovery date
10 October 1868

Observation arc
145.03 yr (52972 d)

10 October 1868

Spectral type
G-type asteroid

Named after

2.64584 AU (395.812 Gm)

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

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