NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Growth of large, late-stage planetesimalsThe paper discusses planetesimals which may have been produced without perturbations by Venus and changes that can be made in Wetherill's model (1976) of growth of large planetisimals. The late stage of terrestrial planets' growth determined their thermal properties and petrology, impact records, and possibly the existence of the moon. A critical result of late-stage models is the size of the largest planetesimals that grew near, and later impacted, those that became full-size planets. The relation between the size of planetesimals and their relative velocities has been misinterpreted, and some models neglect the possible decrease in relative velocity as control is transferred from the largest to the second-largest body in an accretion zone. The size of the second-largest planetesimal in the earth's zone may range from 300 to 2500 km, with corresponding accretion times of 7 times 10 to the 6th and 10 to the 8th power, respectively.
Document ID
19790064072
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Greenberg, R.
(Planetary Science Institute Tucson, Ariz., United States)
Date Acquired
August 9, 2013
Publication Date
August 1, 1979
Publication Information
Publication: Icarus
Volume: 39
Subject Category
Lunar And Planetary Exploration
Accession Number
79A48085
Funding Number(s)
CONTRACT_GRANT: NASW-2909
Distribution Limits
Public
Copyright
Other

Available Downloads

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