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.

List

As of February 2019, at least 5 asteroids have been classified as R-type:<ref name="SBDB">{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>

Designation	Class	Diam.	Refs
349 Dembowska	Template:Small	Template:Small	Template:Small
1904 Massevitch	Template:Small	Template:Small	Template:Small
2371 Dimitrov	Template:Small	Template:Small	Template:Small
5111 Jacliff	Template:Small	Template:Small	Template:Small
(257838) 2000 JQ66	Template:Small	Template:Small	Template:Small
Diameter: averaged estimates only; may change over time

See also

• Asteroid spectral types

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