D-type asteroid

D-type asteroids have a very low albedo and a featureless reddish spectrum. It has been suggested that they have a composition of organic-rich silicates, carbon and anhydrous silicates, possibly with water ice in their interiors. D-type asteroids are found in the outer asteroid belt and beyond; examples are 152 Atala, and 944 Hidalgo as well as the majority of Jupiter trojans. It has been suggested that the Tagish Lake meteorite was a fragment from a D-type asteroid, and that the Martian moon Phobos is closely related.[1]

The Nice model suggests that D-type asteroids may have originated in the Kuiper belt.[2] 46 D-type asteroids are known, including 3552 Don Quixote, 944 Hidalgo, 624 Hektor, and 10199 Chariklo.[3]

Examples

A list of some of the largest D-type asteroids.[3]

Name of Asteroid Classification Diameter
(km)		 Diameter
method		 Minor planet
category
SMASS Tholen
267 TirzaDDU52.68 ±3.1IRASMain-belt asteroid
279 ThuleXD126.59 ±3.7IRASOuter main-belt asteroid
336 LacadieraXkD69.31 ±2.4IRASMain-belt asteroid
368 Haidea–D69.61 ±2.2IRASMain-belt asteroid
624 Hektor–D250 ±25Direct imagingJupiter trojan
721 Tabora–D76.07 ±2.5IRASOuter main-belt asteroid
773 IrmintraudTD95.88 ±1.8IRASMain-belt asteroid
884 Priamus–D110 ±10AbsmagJupiter trojan
911 Agamemnon–D166.66 ±3.9IRASJupiter trojan
944 Hidalgo–D38 ±5AbsmagCentaur
1143 Odysseus–D125.64 ±3.7IRASJupiter trojan
1144 Oda–D57.59 ±2.2IRASOuter main-belt asteroid
1172 Äneas–D142.82 ±4.8IRASJupiter trojan
1167 Dubiago–D63.12 ±5.6IRASOuter main-belt asteroid
1256 Normannia–D69.22 ±2.8IRASOuter main-belt asteroid
1269 Rollandia–D105.19 ±2.8IRASOuter main-belt asteroid
1578 Kirkwood–D51.88 ±1.8IRASOuter main-belt asteroid
1583 Antilochus–D101.62 ±3.2IRASJupiter trojan
1746 Brouwer–D64.25 ±4.9IRASOuter main-belt asteroid
1867 Deiphobus–D122.67 ±3.9IRASJupiter trojan
2207 Antenor–D85.11 ±3.7IRASJupiter trojan
2241 Alcathous–D114.63 ±5.8IRASJupiter trojan
2311 El Leoncito–D53.14 ±3.0IRASOuter main-belt asteroid
2312 Duboshin–D54.94 ±3.2IRASOuter main-belt asteroid
2357 Phereclos–D94.90 ±4.3IRASJupiter trojan
2363 Cebriones–D81.84 ±5.1IRASJupiter trojan
2674 Pandarus–D98.10 ±3.2IRASJupiter trojan
2893 Peiroos–D87.46 ±6.9IRASJupiter trojan
10199 CharikloD–302 ±30n.a.Centaur

See also

References

  1. ↑ Space.com via Yahoo News, Jan 19, 2014, "Potato-Shaped Mars Moon Phobos May Be a Captured Asteroid"
  2. ↑ McKinnon, William B. (September 2008). "On The Possibility Of Large KBOs Being Injected Into The Outer Asteroid Belt". American Astronomical Society. 40: 464. Bibcode:2008DPS....40.3803M. Retrieved 15 December 2015.
  3. 1 2 "JPL Small-Body Database Search Engine: [spec. type = D (Tholen) or spec. type = D (SMASSII)]". JPL Solar System Dynamics. Retrieved 10 August 2016.


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