NASA NTRS · 19780063939
Deimos encounter by Viking - Preliminary imaging results
Abstract
Recent close flybys of Deimos by Viking revealed a smooth-appearing surface void of grooves. Higher-resolution pictures showed that the surface was actually covered with craters but that a regolith filled the smaller craters, giving the smooth appearance. The surface was also covered with boulders and bright streak-like markings analogous to base-surge or ejecta cloud deposits.
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Duxbury, T. C., Veverka, J.. 1978-09-01. Deimos encounter by Viking - Preliminary imaging results. https://ntrs.nasa.gov/citations/19780063939
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