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, 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.
The Nice model suggests that D-type asteroids may have originated in the Kuiper belt. 46 D-type asteroids are known, including: 3552 Don Quixote, 944 Hidalgo, 624 Hektor, and 10199 Chariklo.
Examples
A list of some of the largest D-type asteroids.6
| Name of Asteroid | Classification | Diameter(km) | Diametermethod | Minor planetcategory | |
|---|---|---|---|---|---|
| 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
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. /wiki/Bibcode_(identifier) ↩
Jones, Thomas D.; Lebofsky, Larry A.; Lewis, John S.; Marley, Mark S. (1990-11-01). "The composition and origin of the C, P, and D asteroids: Water as a tracer of thermal evolution in the outer belt". Icarus. 88 (1): 172–192. Bibcode:1990Icar...88..172J. doi:10.1016/0019-1035(90)90184-B. ISSN 0019-1035. https://dx.doi.org/10.1016/0019-1035%2890%2990184-B ↩
[1] Space.com via Yahoo News, Jan 19, 2014, "Potato-Shaped Mars Moon Phobos May Be a Captured Asteroid" https://news.yahoo.com/potato-shaped-mars-moon-phobos-may-captured-asteroid-155337405.html ↩
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. http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2008DPS....40.3803M ↩
"JPL Small-Body Database Search Engine: [spec. type = D (Tholen) or spec. type = D (SMASSII)]". JPL Solar System Dynamics. Retrieved 10 August 2016. https://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 ↩
"JPL Small-Body Database Search Engine: [spec. type = D (Tholen) or spec. type = D (SMASSII)]". JPL Solar System Dynamics. Retrieved 10 August 2016. https://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 ↩