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Microcrater investigations on Surveyor 3 material
- Source :
- NASA, Washington Analysis of Surveyor 3 Mater. and Phot. Returned by Apollo 12.
- Publication Year :
- 1972
- Publisher :
- United States: NASA Center for Aerospace Information (CASI), 1972.
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Abstract
- Screws 9 and 23 from Surveyor 3 were examined with a scanning electron microscope for micrometeorite impact features. Six craters on one of the screws appear to be low velocity impact craters, and a flux for about 0.12 sq cm was calculated to be 0.005/sq m/sec for particle diameter or = 1 micron. Two interpretations are considered: (1) The impacts were produced by interplanetary particles and the flux indicates that deviation from the normal distribution exists only for particles below 1 micron in diameter. (2) Most of the craters were produced by secondary lunar debris, and the flux represents the upper limit for interplanetary particles.
- Subjects :
- Space Sciences
Subjects
Details
- Language :
- English
- Database :
- NASA Technical Reports
- Journal :
- NASA, Washington Analysis of Surveyor 3 Mater. and Phot. Returned by Apollo 12
- Publication Type :
- Report
- Accession number :
- edsnas.19720019104
- Document Type :
- Report