R-type asteroid

R-type asteroids are moderately bright, relatively uncommon inner-belt asteroids that are spectrally intermediate between the V and A-type asteroids. The spectrum shows distinct olivine and pyroxene features at 1 and 2 micrometres, with a possibility of plagioclase. Shortwards of 0.7 μm the spectrum is very reddish.

The IRAS mission has classified 4 Vesta, 246 Asporina, 349 Dembowska, 571 Dulcinea and 937 Bethgea as type R; however, the re-classification of Vesta, the V archetype, is debatable. Of these bodies, only 349 Dembowska is recognized as being type R when all wavelengths are taken into account.

Interior to Earth
Main-belt
- Kirkwood gap
- comets
Trojans
- Venus trojan
- Earth
- Mars
- Jupiter
- Uranus trojan
- Neptune trojan
Near-Earth
- Aten
- Amor
- Apollo
- Apohele
- Earth-crossers
Between Earth and the main belt
- Mars crossers
- Mars trojans
Outer Solar System, does not include distant minor planets
- Jupiter-crossers
- Jupiter trojan

Classification

Orbital

Group
Family
(list)

Spectral

Tholen	C-group B-type F-type G-type C-type S-type X-group M-type E-type P-type small classes A-type D-type J-type T-type Q-type R-type V-type

SMASS	C-group B-type C-type Cg Ch Cgh Cb S-group A-type Q-type R-type K-type L-type S-type Sa Sq Sr Sk Sl X-group X-type Xe Xc Xk small types T-type D-type Ld-type O-type V-type

Exploration

Lists

See also: Asteroids in fiction
Asteroids in astrology
- occultation
Pronunciation
- asteroids
- Jupiter Trojans
Comet

Small Solar System bodies

Minor planets

Designation Groups Moons Meanings of names Pronunciation of names

Asteroids	Aten asteroid Asteroid belt Families Jupiter Trojans Near-Earth Spectral types

Distant minor planets	Centaurs Damocloids Neptune trojans Trans-Neptunian objects Detached Kuiper belt Oort cloud Scattered disc

Comets

Meteoroids

Lists / categories

Asteroid groups and families
Asteroid moons
Binary asteroids
Minor planets

This article is issued from Wikipedia - version of the 6/8/2015. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.

R-type asteroid

See also