WorldCat Identities

Tholen, David J. (David James) 1955-

Overview
Works: 4 works in 8 publications in 1 language and 255 library holdings
Classifications: QB701, 523.482
Publication Timeline
Key
Publications about  David J Tholen Publications about David J Tholen
Publications by  David J Tholen Publications by David J Tholen
Most widely held works by David J Tholen
Pluto and Charon ( Book )
3 editions published in 1997 in English and held by 184 WorldCat member libraries worldwide
Asteroid taxonomy from cluster analysis of photometry by David J Tholen ( )
3 editions published in 1984 in English and held by 3 WorldCat member libraries worldwide
Four E-class asteroids are now known to exist in the main belt, yet nearly twice this number exist in or near the Hungaria region. Twenty eight D-class asteroids have been identified in the outer belt, where they represent a significant fraction of the population. Five D asteroids exist in the main belt, which one lying near the inner edge of the belt, which is dominated by S-class asteroids. Two of the interesting minor classes are associated with particular dynamical families. The Nysa family, with the single exception of Nysa itself, consists entirely of class F asteroids, while the B asteroids are found almost exclusively in the Themis family. The earth-approaching population is represented by at least two objects similar to Vesta and Dembowska, which are as many as are in the entire main belt, while most of the earth-approachers are of class S
Observations of Planet Crossing Asteroids ( )
1 edition published in 1999 in English and held by 1 WorldCat member library worldwide
This grant funds the investigation of the Solar System's planet crossing asteroid population, principally the near Earth and trans-Neptunian objects, but also the Centaurs. Investigations include colorimetry at both visible and near infrared wavelengths, light curve photometry, astrometry, and a pilot project to find near Earth objects with small aphelion distances, which requires observations at small solar elongations
 
Audience Level
0
Audience Level
1
  Kids General Special  
Audience level: 0.90 (from 0.88 for Pluto and ... to 1.00 for Asteroid t ...)
Languages
English (8)
Covers