R-type asteroid
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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:[1]
| Designation | Class | Diam. | Refs |
|---|---|---|---|
| 349 Dembowska | main-beltScript error: No such module "Check for unknown parameters". | 139.77 kmScript error: No such module "Check for unknown parameters". | Template:MPCTemplate:·JPLScript error: No such module "Check for unknown parameters". |
| 1904 Massevitch | main-beltScript error: No such module "Check for unknown parameters". | 13.503 kmScript error: No such module "Check for unknown parameters". | Template:MPCTemplate:·JPLScript error: No such module "Check for unknown parameters". |
| 2371 Dimitrov | main-beltScript error: No such module "Check for unknown parameters". | 7.465 kmScript error: No such module "Check for unknown parameters". | Template:MPCTemplate:·JPLScript error: No such module "Check for unknown parameters". |
| 5111 Jacliff | main-beltScript error: No such module "Check for unknown parameters". | 6.447 kmScript error: No such module "Check for unknown parameters". | Template:MPCTemplate:·JPLScript error: No such module "Check for unknown parameters". |
| (257838) 2000 JQ66 | AmorScript error: No such module "Check for unknown parameters". | 0.78 kmScript error: No such module "Check for unknown parameters". | Template:MPCTemplate:·JPLScript error: No such module "Check for unknown parameters". |
| Diameter: averaged estimates only; may change over time | |||
References
See also
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- ↑ Script error: No such module "citation/CS1".