Passive microwave observations of asteroids.
Abstract
This chapter reviews the advances in the quantity and quality of the radio observations of asteroids and in the understanding of the physics of the asteroidal microwave emission since the first Asteroids volume in 1979. The data now cover the four largest asteroids (Ceres, Pallas, Vesta and Hygiea) at several wavelengths and four smaller asteroids (Interamnia, Eunomia, Euphrosyne and Bamberga) at one wavelength. Disk-resolved observations of Ceres and Vesta (resolution typically 7 or so pixels along a diameter) provide no evidence of strong (≥30% of peak brightness) microwave surface markings implying a nearly uniform spatial distribution of the microwave properties of the material.
- Publication:
-
Asteroids II
- Pub Date:
- 1989
- Bibcode:
- 1989aste.conf..213W
- Keywords:
-
- Asteroids;
- Microwave Emission;
- Radio Astronomy;
- Radio Observation;
- Spectrum Analysis;
- Ceres Asteroid;
- Physical Properties;
- Planetary Surfaces;
- Vesta Asteroid;
- Lunar and Planetary Exploration;
- Minor Planets: Microwave Radiation