11. Organic matter and elemental carbon together constitute the carbonaceous fraction of aerosols. 12. A similar process has been demonstrated for nonbiological carbonaceous particles. 13. Its low albedo suggests that it is a carbonaceous asteroid. 14. Hoover said no one was sure where the Australian carbonaceous chondrite came from. 15. Carbonaceous chondrites comprise about 2 percent of the meteorites recovered from the Earth.16. The Ningqiang carbonaceous chondrite contained sulfur-36 derived from chlorine-36. 17. The conversion efficiency can be rather low due to elutriation of carbonaceous material. 18. This indicates a composition similar to carbonaceous chondrite meteorites. 19. This means it probably has a primitive carbonaceous composition. 20. Asteroid 449 Hamburga is about in diameter and is a carbonaceous type asteroid.
