D-type asteroid
{{short description|Type of asteroid spectral group}}
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.{{Cite journal |last1=Jones |first1=Thomas D. |last2=Lebofsky |first2=Larry A. |last3=Lewis |first3=John S. |last4=Marley |first4=Mark S. |date=1990-11-01 |title=The composition and origin of the C, P, and D asteroids: Water as a tracer of thermal evolution in the outer belt |url=https://dx.doi.org/10.1016/0019-1035%2890%2990184-B |journal=Icarus |volume=88 |issue=1 |pages=172–192 |doi=10.1016/0019-1035(90)90184-B |bibcode=1990Icar...88..172J |issn=0019-1035|url-access=subscription }} 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.
| class="wikitable sortable" | |||||
| rowspan=2 | Name of Asteroid
! colspan=2 |Classification ! rowspan=2 | Diameter ! rowspan=2 | Diameter ! rowspan=2 |Minor planet | |||||
|---|---|---|---|---|---|
| SMASS
! Tholen | |||||
| 267 Tirza | D | DU | {{sort|052.68|52.68 ±3.1}} | IRAS | Main-belt asteroid |
| 279 Thule | X | D | {{sort|126.59|126.59 ±3.7}} | IRAS | Outer main-belt asteroid |
| 336 Lacadiera | Xk | D | {{sort|069.31|69.31 ±2.4}} | IRAS | Main-belt asteroid |
| 368 Haidea | – | D | {{sort|069.61|69.61 ±2.2}} | IRAS | Main-belt asteroid |
| 624 Hektor | – | D | {{sort|250|250 ±25}} | Direct imaging | Jupiter trojan |
| 721 Tabora | – | D | {{sort|076.07|76.07 ±2.5}} | IRAS | Outer main-belt asteroid |
| 773 Irmintraud | T | D | {{sort|095.88|95.88 ±1.8}} | IRAS | Main-belt asteroid |
| 884 Priamus | – | D | {{sort|110|110 ±10}} | Absmag | Jupiter trojan |
| 911 Agamemnon | – | D | {{sort|166.66|166.66 ±3.9}} | IRAS | Jupiter trojan |
| 944 Hidalgo | – | D | {{sort|038|38 ±5}} | Absmag | Centaur |
| 1143 Odysseus | – | D | {{sort|125.64|125.64 ±3.7}} | IRAS | Jupiter trojan |
| 1144 Oda | – | D | {{sort|057.59|57.59 ±2.2}} | IRAS | Outer main-belt asteroid |
| 1172 Äneas | – | D | {{sort|142.82|142.82 ±4.8}} | IRAS | Jupiter trojan |
| 1167 Dubiago | – | D | {{sort|063.12|63.12 ±5.6}} | IRAS | Outer main-belt asteroid |
| 1256 Normannia | – | D | {{sort|069.22|69.22 ±2.8}} | IRAS | Outer main-belt asteroid |
| 1269 Rollandia | – | D | {{sort|105.19|105.19 ±2.8}} | IRAS | Outer main-belt asteroid |
| 1578 Kirkwood | – | D | {{sort|051.88|51.88 ±1.8}} | IRAS | Outer main-belt asteroid |
| 1583 Antilochus | – | D | {{sort|101.62|101.62 ±3.2}} | IRAS | Jupiter trojan |
| 1746 Brouwer | – | D | {{sort|064.25|64.25 ±4.9}} | IRAS | Outer main-belt asteroid |
| 1867 Deiphobus | – | D | {{sort|122.67|122.67 ±3.9}} | IRAS | Jupiter trojan |
| 2207 Antenor | – | D | {{sort|085.11|85.11 ±3.7}} | IRAS | Jupiter trojan |
| 2241 Alcathous | – | D | {{sort|114.63|114.63 ±5.8}} | IRAS | Jupiter trojan |
| 2311 El Leoncito | – | D | {{sort|053.14|53.14 ±3.0}} | IRAS | Outer main-belt asteroid |
| 2312 Duboshin | – | D | {{sort|054.94|54.94 ±3.2}} | IRAS | Outer main-belt asteroid |
| 2357 Phereclos | – | D | {{sort|094.90|94.90 ±4.3}} | IRAS | Jupiter trojan |
| 2363 Cebriones | – | D | {{sort|081.84|81.84 ±5.1}} | IRAS | Jupiter trojan |
| 2674 Pandarus | – | D | {{sort|098.10|98.10 ±3.2}} | IRAS | Jupiter trojan |
| 2893 Peiroos | – | D | {{sort|087.46|87.46 ±6.9}} | IRAS | Jupiter trojan |
| 10199 Chariklo | D | – | {{sort|302|302 ±30}} | n.a. | Centaur |
See also
References
{{reflist
| refs =
| title=A spectroscopic survey of D-type asteroids
| display-authors=1 | last1=Fitzsimmons | first1=A.
| last2=Dahlgren | first2=M. | last3=Lagerkvist | first3=C. -I.
| last4=Magnusson | first4=P. | last5=Williams | first5=I. P.
| journal=Astronomy and Astrophysics
| volume=282 | issue=2 | pages=634–642
| date=February 1994 | bibcode=1994A&A...282..634F }}
|title=JPL Small-Body Database Search Engine: [spec. type
|publisher=JPL Solar System Dynamics
|url=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 |access-date= 10 August 2016}}
|author = McKinnon, William B.
|date = September 2008
|title = On The Possibility Of Large KBOs Being Injected Into The Outer Asteroid Belt
|url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2008DPS....40.3803M
|journal = American Astronomical Society
|volume = 40
|page = 464
|bibcode = 2008DPS....40.3803M
|access-date= 15 December 2015}}
}}
{{Asteroids}}
{{Small Solar System bodies}}
{{DEFAULTSORT:D-Type Asteroid}}
Category:Asteroid spectral classes
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