Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989rpsct....r..12v&link_type=abstract
In its JPRS Report: Science and Technology. USSR: Space p 12 (SEE N89-29354 24-12) Transl. into ENGLISH from Astronomicheskiy Ve
Astronomy and Astrophysics
Astronomy
Astronomical Spectroscopy, Infrared Photometry, Vesta Asteroid, Visible Spectrum, Absorption Spectroscopy, Molecular Spectra, Pyroxenes
Scientific paper
The spectrum of the asteroid Vesta has a clear pyroxene absorption band at 0.92 microns. However, almost no observations have been performed to study the changes in intensity and profile of this band. Such observations were performed in September to October 1986. Changes in delta (v-p) were observed with the phase of rotation of Vesta, probably related to a change in the depth of the pyroxene band, its minimum depth corresponding to the minimum brightness in the visual area. If the variation in depth of the absorption band is related primarily to the content of pyroxene in the surface layer of the asteroid, then in the area corresponding to the maximum brightness curve the content of this mineral is greater than in the area of minimum brightness. Physical characteristics of the pyroxene, such as particle size, may also influence the delta (v-p) variation.
Gaysin S. M.
Mosina S. A.
Shumilin S. S.
Vdovichenko V. D.
Velichko Feodor P.
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