A parent body in meteoritics is the celestial body from which originates a meteorite or a class of meteorites.[1]
Identification
editIt is easiest to correlate a meteorite with a parent body when the parent body still exists. This is the case for Lunar and Martian meteorites. Samples from suspected Lunar meteorites can be compared with samples from the Apollo program. Martian meteorites can be compared to analysis carried out by rovers (e.g. Curiosity).
Meteorites can also be compared to spectral classes of asteroids. In order to identify the parent body of a class of meteorites, scientists compare their albedo and spectra with other known bodies. These studies show that some meteorite classes are closely related to some asteroids. The HED meteorites for example are correlated with 4 Vesta.[2]
Another, perhaps most useful way to classify meteorites by parent bodies is by grouping them according to composition, with types from each hypothetical parent body clustering on a graph.[3] Meteoriticists have tentatively linked extant meteorites to 100-150 parent bodies, far fewer than the ~1 million main-belt asteroids larger than a kilometer. This apparent sampling bias remains an area of active research.[3]
See also
editReferences
edit- ^ J.H. Shirley, R.W. Fairbridge. Encyclopedia of Planetary Sciences, page 111.
- ^ Gunter Faure, Teresa M. Mensing. Introduction to Planetary Science: The Geological Perspective. Page 175. ISBN 9781402052330
- ^ a b Burbine et al., "Meteoritic Parent Bodies: Their Number and Identification." Accessed May 24, 2014