Discovery | |
---|---|
Discovered by | James Craig Watson |
Discovery date | 10 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 | |
Dione ( minor planet designation: 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.
Discovery | |
---|---|
Discovered by | James Craig Watson |
Discovery date | 10 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 | |
Dione ( minor planet designation: 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.