On the relative numbers of C types and S types among near-earth asteroids

Journal Article · Wed Nov 01 00:00:00 EST 1989 · Astronomical Journal; (USA)

DOI:https://doi.org/10.1086/115267· OSTI ID:7143413

Luu, J; Jewitt, D ^[1]

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1. MIT, Cambridge, MA (USA) Hawaii Univ., Honolulu (USA)

The discovery circumstances of the near-earth asteroids (NEAs) were modeled in order to investigate the observational selection effects associated with NEAs. It is suggested that these selection effects are responsible for the apparent overabundance of S types among the NEAs and that this overabundance is in part a result of the larger phase darkening of the C types over the S types. The large phase angles and preferential phase darkening of the C type NEAs force some of them below the threshold of detectability (in a magnitude-limited survey), thus exaggerating the number of S type NEAs. 23 refs.

• OSTI ID: 7143413
• Journal Information: Astronomical Journal; (USA), Vol. 98; ISSN 0004-6256
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ASTEROIDS
CLASSIFICATION
DYNAMICS
EARTH PLANET
GRAVITATION
ORBITS
PLANETS
SOLAR SYSTEM
MECHANICS
640107* - Astrophysics & Cosmology- Planetary Phenomena