Asteroid families, dynamics and astrometry

Details Asteroid families, dynamics and astrometry Asteroid families, dynamics and astrometry

May 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987pggp.rept...75w&link_type=abstract

In NASA, Washington, Reports of Planetary Geology and Geophysics Program, 1986 p 75-76 (SEE N87-23341 16-91)

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Applications

Applications Programs (Computers), Asteroids, Astrometry, Mars (Planet), Software Engineering, Astronomical Photography, Microcomputers, Velocity Distribution

Scientific paper

The proper elements and family assignments for the 1227 Palomar-Leiden Survey asteroids of high quality were tabulated. In addition to the large table, there are also auxiliary tables of Mars crossers and commensurate objects, histograms of the proper element distributions, and a discussion. Probably the most important part of the discussion describes the Mars crossing boundary, how the closest distances of approach to Mars and Jupiter are calculated, and why the observed population of Mars crossers should bombard that planet episodically rather than uniformly. Analytical work was done to derive velocity distributions of family forming events from proper element distributions subject to assumptions which may be appropriate for cratering events. Software was developed for a microcomputer to permit plotting of the proper elements. Three orthogonal views are generated and stereo pairs can be printed when desired. This program was created for the study of asteroid families. The astrometry task is directed toward measuring and reducing positions on faint comets and the minor planets with less common orbits. The observational material is CCD frames taken with the Palomar 1.5 m telescope. Positions of 10 comets and 16 different asteroids were published on the Minor Planet Circulars.

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