Photometric observations of Mercury from Mariner 10

Details Photometric observations of Mercury from Mariner 10 Photometric observations of Mercury from Mariner 10

Jun 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975jgr....80.2431h&link_type=abstract

Journal of Geophysical Research, vol. 80, June 10, 1975, p. 2431-2443.

Astronomy and Astrophysics

Astronomy

47

Albedo, Astronomical Photometry, Craters, Mariner Venus-Mercury 1973, Mercury (Planet), Planetary Surfaces, Imaging Techniques, Lunar Maria, Mosaics, Spaceborne Photography, Tables (Data)

Scientific paper

The elimination of the residual image problem which plagued previous Mariner imaging systems allowed photometry of moderately high quality to be carried out on Mercury by Mariner 10. The conclusions from the photometric analysis are as follows. To a surface resolution of 20 km, Mercury is covered with a dark fine-grained soil similar to the lunar regolith. No regions having anomalous polarization or color were discovered, which might have implied large amounts of metallic Fe or exposed bare rock. Photoclinometry suggests that the center of the Caloris Basin may be about 9 km below the outside rim. The heavily cratered plains have albedos of about 0.17, somewhat brighter than the lunar highlands. The albedos of the darker smooth plains and the interiors of bright fresh craters are systematically higher than their lunar counterparts. One consistent interpretation of the color and albedo relationships is that the dark smooth plains resemble the low-Ti, low-Fe lunar maria and that the crust is generally low in Ti, metallic Fe, and Fe(3+).

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