Astronomy:D-type asteroid

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Short description: Type of asteroid spectral group

D-type asteroids have a very low albedo and a featureless reddish spectrum.[1] It has been suggested that they have a composition of organic-rich silicates, carbon and anhydrous silicates, possibly with water ice in their interiors.[citation needed] D-type asteroids are found in the outer asteroid belt and beyond; examples are 152 Atala, 944 Hidalgo and most 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.[2]

The Nice model suggests that D-type asteroids may have originated in the Kuiper belt.[3] 46 D-type asteroids are known, including: 3552 Don Quixote, 944 Hidalgo, 624 Hektor, and 10199 Chariklo.[4]

Examples

A list of some of the largest D-type asteroids.[4]

Name of Asteroid Classification Diameter
(km) 		Diameter
method 		Minor planet
category
SMASS Tholen
267 Tirza D DU 052.68 52.68 ±3.1 IRAS Main-belt asteroid
279 Thule X D 126.59 126.59 ±3.7 IRAS Outer main-belt asteroid
336 Lacadiera Xk D 069.31 69.31 ±2.4 IRAS Main-belt asteroid
368 Haidea – D 069.61 69.61 ±2.2 IRAS Main-belt asteroid
624 Hektor – D 250 250 ±25 Direct imaging Jupiter trojan
721 Tabora – D 076.07 76.07 ±2.5 IRAS Outer main-belt asteroid
773 Irmintraud T D 095.88 95.88 ±1.8 IRAS Main-belt asteroid
884 Priamus – D 110 110 ±10 Absmag Jupiter trojan
911 Agamemnon – D 166.66 166.66 ±3.9 IRAS Jupiter trojan
944 Hidalgo – D 038 38 ±5 Absmag Centaur
1143 Odysseus – D 125.64 125.64 ±3.7 IRAS Jupiter trojan
1144 Oda – D 057.59 57.59 ±2.2 IRAS Outer main-belt asteroid
1172 Äneas – D 142.82 142.82 ±4.8 IRAS Jupiter trojan
1167 Dubiago – D 063.12 63.12 ±5.6 IRAS Outer main-belt asteroid
1256 Normannia – D 069.22 69.22 ±2.8 IRAS Outer main-belt asteroid
1269 Rollandia – D 105.19 105.19 ±2.8 IRAS Outer main-belt asteroid
1578 Kirkwood – D 051.88 51.88 ±1.8 IRAS Outer main-belt asteroid
1583 Antilochus – D 101.62 101.62 ±3.2 IRAS Jupiter trojan
1746 Brouwer – D 064.25 64.25 ±4.9 IRAS Outer main-belt asteroid
1867 Deiphobus – D 122.67 122.67 ±3.9 IRAS Jupiter trojan
2207 Antenor – D 085.11 85.11 ±3.7 IRAS Jupiter trojan
2241 Alcathous – D 114.63 114.63 ±5.8 IRAS Jupiter trojan
2311 El Leoncito – D 053.14 53.14 ±3.0 IRAS Outer main-belt asteroid
2312 Duboshin – D 054.94 54.94 ±3.2 IRAS Outer main-belt asteroid
2357 Phereclos – D 094.90 94.90 ±4.3 IRAS Jupiter trojan
2363 Cebriones – D 081.84 81.84 ±5.1 IRAS Jupiter trojan
2674 Pandarus – D 098.10 98.10 ±3.2 IRAS Jupiter trojan
2893 Peiroos – D 087.46 87.46 ±6.9 IRAS Jupiter trojan
10199 Chariklo D – 302 302 ±30 n.a. Centaur

See also

References

  1. ↑ Fitzsimmons, A. et al. (February 1994). "A spectroscopic survey of D-type asteroids". Astronomy and Astrophysics 282 (2): 634–642. Bibcode: 1994A&A...282..634F. 
  2. ↑ [1] Space.com via Yahoo News, Jan 19, 2014, "Potato-Shaped Mars Moon Phobos May Be a Captured Asteroid"
  3. ↑ 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. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2008DPS....40.3803M. Retrieved 15 December 2015. 
  4. ↑ 4.0 4.1 "JPL Small-Body Database Search Engine: [spec. type = D (Tholen) or spec. type = D (SMASSII)"]. JPL Solar System Dynamics. http://ssd.jpl.nasa.gov/sbdb_query.cgi?obj_group=all;obj_kind=all;obj_numbered=all;OBJ_field=0;ORB_field=0;combine_mode=OR;c1_group=OBJ;c1_item=Ay;c1_op=%3D;c1_value=D;c2_group=OBJ;c2_item=Ax;c2_op=%3D;c2_value=D;table_format=HTML;max_rows=100;format_option=comp;c_fields=AcBhBgBjBiBnBsAiArApAxAy;.cgifields=format_option;.cgifields=obj_kind;.cgifields=obj_group;.cgifields=obj_numbered;.cgifields=combine_mode;.cgifields=ast_orbit_class;.cgifields=table_format;.cgifields=com_orbit_class&query=1&c_sort=AcA. 




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