Asteroid bodies

Mittlefehldt, D. W., McCoy, T. J., Goodrich, C. A. and Kracher, A. (1998) Non-chondritic meteorites from asteroidal bodies. In Planetary Materials, Reviews in Mineralogy 36, ed. Papike, J. J. Washington, D.C. Mineralogical Society of America, pp. 4-1 to... 

Ceres 2.5-3 264 1,020 175 close resemblances between some asteroid and meteorite spectra suggest parent asteroid bodies Vesta and basaltic achondrites indicate a differentiated parent body. 

With the success of the Stardust mission, tests of our models for solar nebula, and thus protoplanetary disk evolution, are no longer limited to asteroidal bodies (meteorites), but now can be applied to cometary bodies as well. Stardust returned dust grains that were ejected from the surface of comet Wild 2, a Jupiter-family cometthatis thought to have formed at distances of >20 AU from the Sun (Brownlee et al. 2006). Thus, we now have samples of materials from the outer solar nebula that can be studied in detail. 

Differentiated achondrites represent the products of classical igneous processes acting on the silicate-oxide system of asteroidal bodies— partial to complete melting, and magmatic crystallization. Iron meteorites represent the complementary metal-sulfide system products of this process. 

Mesosiderites are polymict breccias, as are many HED meteorites, thus presenting evidence for impact mixing on the surfaces of their parent bodies. Impact mixing on asteroidal bodies is expected to be parent-body-wide (e.g., Housen et al., 1979), leading some researchers to argue that mesosiderites and HEDs were formed on different parent bodies (see Mittlefehldt et al., 1998 Rubin and Mittlefehldt, 1993). 

Mittlefehldt D. W., McCoy T. J., Goodrich C. A., andKracher A. (1998) Non-chondritic meteorites from asteroidal bodies. 

Among the fractionated meteorites, such as the eucrites, the lanthanides show some variation. These meteorites, the basaltic achondrites, are basalts, originating as lavas on small asteroidal bodies (Basaltic Volcanism Study Project 1981, p. 214). The eucrites form one important class. Since the asteroid 4 Vesta, 555km in diameter, has a basaltic-like surface from spectral reflectance data, it is a prime candidate for the source of such meteorites, although considerable dynamical problems remain (Gehrels 1979). 

A man aged 54 years, who was exposed to cork dust for about 14 years, showed intraalveolar giant cells loaded with coal and cork particles. Some had asteroid bodies in their cytoplasm (Remmele and... 

Non-chondritic meteorites from asteroidal bodies, in Planetary Materials (ed. J.J. Papike), Mineralogical Society of America, Washington, DC,... 

Scattered throughout the interstitium are poorly formed granulomas consisting of small clusters of epithelioid histiocytes and occasional giant cells. The granulomas tend to be near airways or arteries. If the granulomas are well formed or contain necrosis other diseases should be considered such as sarcoidosis or infection. The giant cells may contain small stellate-shaped asteroid bodies or calcified Schaumann bodies. 

Figure 11 (See color insert.) Histopathology of pulmonary sarcoidosis. (A, B) Granulomas with Schaumann body (A) and asteroid body (B), characteristic but not specific for sarcoidosis H E stain, x200) (C, D) Granulomatous arteritis (C) and venulitis (D) commonly seen in the lung with sarcoidosis (C, trichrome/elastic stain x 100 D, H E stain, X100).

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