Laboratory reflection polarimetry is presented for eight samples of artificial, poorly crystalline magnesian silicates with varying admixtures of carbon black. The polarimetric slope-albedo law saturates for geometric albedos lower than about 0.05, and good agreement with the telescopic polarization-phase curves of C-type asteroids is found for albedos as low as 0.02. Thus the conclusion from thermal radiometry is confirmed that the C objects are very dark, darker than any known carbonaceous chondrite.
Lunar and Planetary Science Conference Proceedings
- Pub Date:
- Carbonaceous Chondrites;
- Extraterrestrial Matter;
- Magnesium Oxides;
- Phase Shift;
- Lunar and Planetary Exploration