Some years ago we started a spectroscopic survey, in the visible region, of Earth-approaching asteroids to investigate their compositional nature in order to improve the comprehension of their origin. To date we have obtained low-resolution spectra, in the range 0.5-1.0 μm, of 1 Aten (3753 1986 TO), 4 Apollo (1864 Daedalus, 5786 Talos, 1989 JA, 2063 Bacchus), and 3 Amor (3352McAuliffe, 4954 Eri...

Tellurium stable isotope compositions and abundances (?128/126Te relative to SRM 3156) are reported for 43 ordinary, enstatite, Rumuruti chondrites, which together with results from a companion study on carbonaceous chondrites used assess the origin of volatile element fractionations in chondrites. Whereas Te variations among predominantly reflect mixing between isotopically light chondrules/ch...

The NEAR mission to 433 Eros provided detailed data on the geology, mineralogy, and chemistry of this S-class asteroid [McCoy, T.J., Robinson, M.S., Nittler, L.R., Burbine, T.H., 2002. Chem. Erde 62, 89–121; Cheng, A.F., 1997. Space Sci. Rev. 82, 3–29] with a key science goal of understanding the relationship between asteroids and meteorites [Cheng, A.F., 1997. Space Sci. Rev. 82, 3–29; Gaffey,...

A suite of 47 carbonaceous, enstatite, and ordinary chondrites are examined for Re-Os isotopic systematics. There are significant differences in the Re/Os and Os/Os ratios of carbonaceous chondrites compared with ordinary and enstatite chondrites. The average Re/Os for carbonaceous chondrites is 0.392 0.015 (excluding the CK chondrite, Karoonda), compared with 0.422 0.025 and 0.421 0.013 for or...

ABSTRACT The Traspena meteorite fell on 2021 January 18 about 20 km south-east of the city Lugo (Galiza, Spain), shortly after a huge and bright fireball crossed sky for 4.84 s. Astrometric measurements obtained from cameras Universidade de Santiago Compostela (USC) as well many casual videos were used to determine atmospheric trajectory this meteoroid which penetrated atmosphere generated soun...

High-resolution Fourier spectra in the 0.9-2.5 ym region were measured for sixteen asteroids. These data were combined with 0.3-1.1 um spectrophotometry and 3.0-3.5 urn narrowband photometry for compositional analysis. Comparison spectra of meteorites and terrestrial minerals were measured in the laboratory, some under simulated asteroidal conditions of pressure and temperature. Spectra of elev...