The composition of PHOBOS - Evidence for carbonaceous chondrite surface from spectral analysis

Details The composition of PHOBOS - Evidence for carbonaceous chondrite surface from spectral analysis The composition of PHOBOS - Evidence for carbonaceous chondrite surface from spectral analysis

Jan 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978sci...199...64p&link_type=abstract

Science, vol. 199, Jan. 6, 1978, p. 64-66. NASA-supported research.

Computer Science

21

Carbonaceous Chondrites, Phobos, Remote Sensors, Spectral Reflectance, Albedo, Ceres Asteroid, Infrared Spectra, Mariner 9 Space Probe, Planetary Composition, Ultraviolet Spectra, Viking Lander Spacecraft, Satellites, Mars, Phobos, Albedo, Ultraviolet, Wavelengths, Composition, Spectroscopy, Reflectivity, Carbonaceous Chondrites, Meteorites, Analysis

Scientific paper

In connection with a need for more definitive information concerning the composition of Phobos in a study of its origin, an ultraviolet-visible-infrared reflectance spectrum of the Martian satellite was compiled from the Mariner 9 ultraviolet spectrometer, Viking lander imaging, and ground-based photometric data. The probable surface composition of Phobos was deduced by comparing the obtained spectrum with the spectra of asteroids of known composition. The considered data show that the reflectivity of Phobos is flat from 1100 to 400 nm but decreases sharply in the ultraviolet to about 1 percent at 212 nm. The reflectance spectrum is similar to the spectra of asteroids Ceres and Pallas which were found to have surface compositions similar to that of carbonaceous chondrites. It is concluded that the surface composition of Phobos is also similar to that of carbonaceous chondrites. The results of the investigation point to different modes of origin for Mars and Phobos.

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