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D-type asteroid

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Title: D-type asteroid  
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Subject: Asteroid spectral types, L-type asteroid, C-type asteroid, T-type asteroid, 773 Irmintraud
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D-type asteroid

D-type asteroids have a very low 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 1
  • Notes 2
  • See also 3
  • References 4


A list of the first 10 asteroids that are D-type.

Asteroid SMASS type Tholen type Diameter (km) Diameter method Orbit type
267 Tirza D Du 52.68 ±3.1 IRAS MBA
279 Thule X D 126.59 ±3.7 IRAS OMBA
336 Lacadiera Xk D 69.31 ±2.4 IRAS MBA
368 Haidea - D 69.61 ±2.2 IRAS MBA
624 Hektor - D 250 ±25 Direct imaging JT
721 Tabora - D 76.07 ±2.5 IRAS OMBA
773 Irmintraud T D 95.88 ±1.8 IRAS MBA
884 Priamus - D 110 ±10 Absmag JT
911 Agamemnon - D 166.66 ±3.9 IRAS JT
944 Hidalgo - D 38 ±5 Absmag CEN



See also


  1. ^ [2] via Yahoo News, Jan 19, 2014, "Potato-Shaped Mars Moon Phobos May Be a Captured Asteroid"
  2. ^ William B. McKinnon, 2008, "On The Possibility Of Large KBOs Being Injected Into The Outer Asteroid Belt". American Astronomical Society, DPS meeting #40, #38.03 [3]
  3. ^ "JPL Small-Body Database Search Engine: [ spec. type = D (Tholen) or spec. type = D (SMASSII) ]". JPL Solar System Dynamics. Retrieved 2015-06-17. 
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