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Related Experiment Videos

Radiometry of near-earth asteroids.

G J Veeder1, M S Hanner, D L Matson

  • 1Jet Propulsion Laboratory, California Institute of Technology, Pasadena 91109, USA.

The Astronomical Journal
|April 1, 1989
PubMed
Summary
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This study presents infrared photometry for 22 near-Earth asteroids, revealing insights into their surface properties and composition. Some asteroids exhibit high thermal inertia, suggesting rocky surfaces, with specific classifications noted for asteroids 3103 and 3552.

Area of Science:

  • Astronomy and astrophysics
  • Planetary science
  • Infrared astronomy

Background:

  • Near-Earth asteroids (NEAs) are crucial for understanding solar system evolution and potential impact hazards.
  • Characterizing NEA surface properties, such as albedo and thermal inertia, provides clues to their composition and origin.
  • Previous studies have utilized various observational techniques to classify NEAs, but detailed thermal property analysis remains ongoing.

Purpose of the Study:

  • To present 10-micrometer infrared photometry data for a sample of 22 Aten, Apollo, and Amor asteroids.
  • To derive radiometric albedos and diameters for these asteroids using thermal modeling.
  • To investigate the surface thermal inertia and infer surface properties (e.g., bare rock, coarse regolith) of the studied NEAs.

Main Methods:

Keywords:
NASA Center JPLNASA Discipline ExobiologyNASA Discipline Number 52-10NASA Program Exobiology

Related Experiment Videos

  • Acquisition of 10-micrometer infrared photometric data for 22 NEAs.
  • Application of thermal modeling techniques to analyze the infrared data.
  • Calculation of radiometric albedos and diameters based on the thermal models.

Main Results:

  • Photometric data and derived physical parameters (albedo, diameter) for 22 NEAs.
  • Identification of several asteroids with high thermal inertia, indicative of exposed rock or coarse regolith.
  • Classification of Apollo asteroid 3103 (1982 BB) as class E.
  • Confirmation of Jupiter-crossing Amor asteroid 3552 (1983 SA) as class D.

Conclusions:

  • The study provides valuable infrared observational data for a sample of NEAs.
  • The findings suggest a diversity of surface properties among NEAs, with some exhibiting characteristics of bare rock.
  • Low albedos remain uncommon among the studied near-Earth asteroids, consistent with broader trends.