106 Dione

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106 Dione
Discovery
Discovered by James Craig Watson
Discovery date October 10, 1868
Designations
Named after
Dione
Main belt
Orbital characteristics[1]
Epoch December 31, 2006 (JD 2454100.5)
Aphelion 556.376 Gm (3.719 AU)
Perihelion 391.585 Gm (2.618 AU)
473.981 Gm (3.168 AU)
Eccentricity 0.174
2059.923 d (5.64 a)
16.61 km/s
161.899°
Inclination 4.616°
62.400°
329.534°
Physical characteristics
Dimensions 147.17 ± 3.34[2] km
Mass (3.06 ± 1.54) × 1018[2] kg
Mean density
1.83 ± 0.92[2] g/cm3
0.0410 m/s²
0.0775 km/s
16.26 ± 0.02[3] h
Temperature ~156 K
Spectral type
G (Tholen)
Cgh (Bus)[4]
7.41

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,[5] 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.[6]

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,[7] closely matching the value acquired by the IRAS satellite.[citation needed]

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.[8]

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.[3]

One of Saturn's satellites is also named Dione.

References

  1. Yeomans, Donald K., "106 Dione", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 2013-03-25.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  2. 2.0 2.1 2.2 Lua error in Module:Citation/CS1/Identifiers at line 47: attempt to index field 'wikibase' (a nil value). See Table 1.
  3. 3.0 3.1 Lua error in Module:Citation/CS1/Identifiers at line 47: attempt to index field 'wikibase' (a nil value).
  4. Lua error in Module:Citation/CS1/Identifiers at line 47: attempt to index field 'wikibase' (a nil value). See appendix A.
  5. "Numbered Minor Planets 1–5000", Discovery Circumstances, IAU Minor Planet center, retrieved 2013-04-07.<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles>
  6. Lua error in Module:Citation/CS1/Identifiers at line 47: attempt to index field 'wikibase' (a nil value).
  7. Lua error in Module:Citation/CS1/Identifiers at line 47: attempt to index field 'wikibase' (a nil value).
  8. Lua error in Module:Citation/CS1/Identifiers at line 47: attempt to index field 'wikibase' (a nil value).