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) | |
Average orbital speed | 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 kg[2] |
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.
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
- ↑ Yeomans, Donald K., "106 Dione", JPL Small-Body Database Browser (NASA Jet Propulsion Laboratory), retrieved 2013-03-25.
- 1 2 3 Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science 73, pp. 98–118, arXiv:1203.4336, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009. See Table 1.
- 1 2 Pray, Donald P. (September 2005), "Lightcurve analysis of asteroids 106, 752, 847, 1057, 1630, 1670, 1927 1936, 2426, 2612, 2647, 4087, 5635, 5692, and 6235", The Minor Planet Bulletin 32 (3): 48–51, Bibcode:2005MPBu...32...48P.
- ↑ DeMeo, Francesca E.; et al. (2011), "An extension of the Bus asteroid taxonomy into the near-infrared" (PDF), Icarus 202 (1): 160–180, Bibcode:2009Icar..202..160D, doi:10.1016/j.icarus.2009.02.005, retrieved 2013-03-22. See appendix A.
- ↑ "Numbered Minor Planets 1–5000", Discovery Circumstances (IAU Minor Planet center), retrieved 2013-04-07.
- ↑ McDonald, Sophia Levy (June 1948), "General perturbations and mean elements, with representations of 35 minor planets of the Hecuba group", Astronomical Journal 53, p. 199, Bibcode:1948AJ.....53..199M, doi:10.1086/106097.
- ↑ Kristensen, L. K. (1984), "The diameter of (106) Dione", Astronomische Nachrichten 305 (4), pp. 207–211, Bibcode:1984AN....305..207K, doi:10.1002/asna.2113050410.
- ↑ Ryan, Erin Lee; et al. (April 2012), "The Kilometer-Sized Main Belt Asteroid Population as Revealed by Spitzer", eprint arXiv, arXiv:1204.1116, Bibcode:2012arXiv1204.1116R.
External links
- 106 Dione at the JPL Small-Body Database
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