106 Dione

Not to be confused with Saturn's moon Dione.

106 Dione
Discovery
Discovered byJames 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 arc145.03 yr (52972 d)
Aphelion3.7032 AU (553.99 Gm)
Perihelion2.64584 AU (395.812 Gm)
3.17451 AU (474.900 Gm)
Eccentricity0.16653
5.66 yr (2065.9 d)
16.61 km/s
51.5257°
0° 10m 27.336s / day
Inclination4.5972°
62.163°
329.725°
Earth MOID1.65175 AU (247.098 Gm)
Jupiter MOID1.73379 AU (259.371 Gm)
TJupiter3.175
Physical characteristics
Dimensions146.59±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.

  1. ^ Noah Webster (1884) A Practical Dictionary of the English Language
  2. ^ a b c Cite error: The named reference JPL was invoked but never defined (see the help page).
  3. ^ a b c Cite error: The named reference Carry2012 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference BMPS32_3_48 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference DeMeo2011 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference IAU_MPC was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference McDonald1948 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Kristensen1984 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference 2012arXiv1204 was invoked but never defined (see the help page).