106 Dione

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106 Dione
106 Dione.png
Discovery
Discovered by James Craig Watson
Discovery date10 October 1868
Designations
(106) Dione
Pronunciation /daɪˈoʊniː/ [1]
Named after
 Dione
A868 TA, 1902 TA
Main belt
Orbital characteristics [2]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc 145.03 yr (52972 d)
Aphelion 3.7032  AU (553.99  Gm)
Perihelion 2.64584 AU (395.812 Gm)
3.17451 AU (474.900 Gm)
Eccentricity 0.16653
5.66 yr (2065.9 d)
Average orbital speed
16.61 km/s
51.5257°
0° 10m 27.336s / day
Inclination 4.5972°
62.163°
329.725°
Earth  MOID 1.65175 AU (247.098 Gm)
Jupiter  MOID 1.73379 AU (259.371 Gm)
TJupiter 3.175
Physical characteristics
Dimensions 146.59±2.8  km [2]
147.17 ± 3.34 [3] km
Mass (3.06 ± 1.54) × 1018 kg [3]
Mean density
1.83 ± 0.92 [3] g/cm3
Equatorial surface gravity
0.0410 m/s²
Equatorial escape velocity
0.0775 km/s
16.26  h (0.678  d) [2]
16.26 ± 0.02 h [4]
0.0893±0.003
Temperature ~156 K
G (Tholen)
Cgh (Bus) [5]
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, [6] 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. [7] The orbital period for this object is 5.66 years and it has an eccentricity of 0.17.

    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. 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, [8] closely matching the value acquired by the IRAS satellite.[ citation needed ] As of 2012, the mean diameter derived through occultation measurements is 176.7±0.4 km. [9]

    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. [4] It is classified as a rare G-type asteroid, suggesting it has a carbonaceous composition with phyllosilicate minerals also being detected.

    References

    1. ↑ Noah Webster (1884) A Practical Dictionary of the English Language
    2. 1 2 3 Yeomans, Donald K., "106 Dione", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory , retrieved 12 May 2016.
    3. 1 2 3 Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science, 73 (1): 98–118, arXiv: 1203.4336 , Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009, S2CID   119226456. See Table 1.
    4. 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.
    5. ↑ 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, archived from the original (PDF) on 17 March 2014, retrieved 22 March 2013. See appendix A.
    6. ↑ "Numbered Minor Planets 1–5000", Discovery Circumstances, IAU Minor Planet center, retrieved 7 April 2013.
    7. ↑ McDonald, Sophia Levy (June 1948), "General perturbations and mean elements, with representations of 35 minor planets of the Hecuba group", Astronomical Journal, 53: 199, Bibcode:1948AJ.....53..199M, doi:10.1086/106097.
    8. ↑ Kristensen, L. K. (1984), "The diameter of (106) Dione", Astronomische Nachrichten, 305 (4): 207–211, Bibcode:1984AN....305..207K, doi:10.1002/asna.2113050410.
    9. ↑ Ryan, Erin Lee; et al. (April 2012), "The Kilometer-Sized Main Belt Asteroid Population as Revealed by Spitzer", arXiv: 1204.1116 [astro-ph.EP]
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