View source for D-type asteroid

{{short description|Type of asteroid spectral group}}
'''D-type asteroids''' have a very low [[albedo]] and a featureless reddish [[Asteroid spectral types|spectrum]].<ref name=Fitzsimmons1994/> It has been suggested that they have a composition of organic-rich [[silicate]]s, [[carbon]] and [[anhydrous]] silicates, possibly with water [[ice]] in their interiors.<ref>{{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 }}</ref> D-type asteroids are found in the outer [[asteroid belt]] and beyond; examples are [[152 Atala]], [[944 Hidalgo]] and most [[Jupiter trojan]]s.  It has been suggested that the [[Tagish Lake (meteorite)|Tagish Lake meteorite]] was a fragment from a D-type asteroid, and that the Martian moon [[Phobos (moon)|Phobos]] is closely related.<ref name="space-phobos" />

The [[Nice model]] suggests that D-type asteroids may have originated in the [[Kuiper belt]].<ref name="McKinnon-2008" />    46 D-type asteroids are known, including: [[3552 Don Quixote]], [[944 Hidalgo]], [[624 Hektor]], and [[10199 Chariklo]].<ref name="SBDB-D-type-list" />

== Examples ==

A list of some of the largest D-type asteroids.<ref name="SBDB-D-type-list" />
{|class="wikitable sortable"
|-
! rowspan=2 | Name of Asteroid
! colspan=2 |Classification
! rowspan=2 | Diameter<br />(km)
! rowspan=2 | Diameter<br />method
! rowspan=2 |Minor planet<br />[[Minor planet#Populations|category]]
|-
! [[SMASS classification|SMASS]]
! [[Tholen spectral classification|Tholen]]
|-
| [[267 Tirza]] || D || DU || {{sort|052.68|52.68 ±3.1}} || [[IRAS]] || [[Main-belt]] asteroid
|-
| [[279 Thule]] || [[X-type asteroid|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 (minor planet)|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 ==
* [[Asteroid spectral types]]
* [[Tagish Lake (meteorite)]]

== References ==
<references>
<ref name=Fitzsimmons1994>{{cite journal
 | 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 }}</ref>

<ref name="SBDB-D-type-list">{{cite web
  |title=JPL Small-Body Database Search Engine: [spec. type <nowiki>=</nowiki> D (Tholen) or spec. type <nowiki>=</nowiki> D (SMASSII)]
  |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}}</ref>

<ref name="McKinnon-2008">{{cite journal
  |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}}</ref>

<ref name="space-phobos">{{Cite news |author1=Nola Taylor Tillman |date=2014-01-15 |title=Potato-Shaped Mars Moon Phobos May Be a Captured Asteroid |url=https://www.space.com/24285-mars-moon-phobos-captured-asteroid.html |access-date=2025-11-24 |website=[[Space.com]] |language=en}}</ref>
</references> <!-- end of reflist -->

{{Asteroids}}
{{Small Solar System bodies}}

{{DEFAULTSORT:D-Type Asteroid}}
[[Category:Asteroid spectral classes]]
[[Category:D-type asteroids]]


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