NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
The planet crossing asteroid survey: Progress in the analysis of populations and terrestrial-planet cratering ratesThe Planet-Crossing Asteroid Survey (PCAS) is making steady progress toward the accumulation of the data required to make improved estimates of the populations and cratering rates which can be compared with the existing record of impact events. The PCAS is the chief source of new objects on which to base these calculations over the past decade, and is an integral part of the continuing refinement of the estimates used in planetological applications. An adjunct effort to determine albedo statistics from photometry of UCAS plates is being pursued as well, to better define the magnitude frequency distributions of asteroids. This will improve the quality of the population and collision probability calculations. The survey effort continues to discover new asteroids whose orbital characteristics may reveal the origin and evolution mechanisms reponsible for the transport of the planet-crossing asteroids to the inner solar system.
Document ID
19840015381
Acquisition Source
Legacy CDMS
Document Type
Other
Authors
Helin, E. F.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Dunbar, R. S.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
August 12, 2013
Publication Date
April 1, 1984
Publication Information
Publication: NASA. Washington Repts. of Planetary Geol. Program
Subject Category
Lunar And Planetary Exploration
Accession Number
84N23449
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Document Inquiry

Available Downloads

There are no available downloads for this record.
No Preview Available