D-type asteroid

D-type asteroids have a very low albedo and a featureless reddish electromagnetic 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] There are 46 D-type asteroids which include 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 Tirza D Du 52.68 ±3.1 IRAS Main-belt asteroid
279 Thule X D 126.59 ±3.7 IRAS Outer main-belt asteroid
336 Lacadiera Xk D 69.31 ±2.4 IRAS Main-belt asteroid
368 Haidea – D 69.61 ±2.2 IRAS Main-belt asteroid
624 Hektor – D 250 ±25 Direct imaging Jupiter trojan
721 Tabora – D 76.07 ±2.5 IRAS Outer main-belt asteroid
773 Irmintraud T D 95.88 ±1.8 IRAS Main-belt asteroid
884 Priamus – D 110 ±10 Absmag Jupiter trojan
911 Agamemnon – D 166.66 ±3.9 IRAS Jupiter trojan
944 Hidalgo – D 38 ±5 Absmag Centaur
1143 Odysseus – D 125.64 ±3.7 IRAS Jupiter trojan
1144 Oda – D 57.59 ±2.2 IRAS Outer main-belt asteroid
1172 Äneas – D 142.82 ±4.8 IRAS Jupiter trojan
1167 Dubiago – D 63.12 ±5.6 IRAS Outer main-belt asteroid
1256 Normannia – D 69.22 ±2.8 IRAS Outer main-belt asteroid
1269 Rollandia – D 105.19 ±2.8 IRAS Outer main-belt asteroid
1578 Kirkwood – D 51.88 ±1.8 IRAS Outer main-belt asteroid
1583 Antilochus – D 101.62 ±3.2 IRAS Jupiter trojan
1746 Brouwer – D 64.25 ±4.9 IRAS Outer main-belt asteroid
1867 Deiphobus – D 122.67 ±3.9 IRAS Jupiter trojan
2207 Antenor – D 85.11 ±3.7 IRAS Jupiter trojan
2241 Alcathous – D 114.63 ±5.8 IRAS Jupiter trojan
2311 El Leoncito – D 53.14 ±3.0 IRAS Outer main-belt asteroid
2312 Duboshin – D 54.94 ±3.2 IRAS Outer main-belt asteroid
2357 Phereclos – D 94.90 ±4.3 IRAS Jupiter trojan
2363 Cebriones – D 81.84 ±5.1 IRAS Jupiter trojan
2674 Pandarus – D 98.10 ±3.2 IRAS Jupiter trojan
2893 Peiroos – D 87.46 ±6.9 IRAS Jupiter trojan
10199 Chariklo D – 302 ±30 n.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 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 December 2015.


This article is issued from Wikipedia - version of the Saturday, April 30, 2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.