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Related Experiment Video

Updated: Jul 11, 2026

Scattering And Absorption of Light in Planetary Regoliths

Scattering And Absorption of Light in Planetary Regoliths

Published on: July 1, 2019

Comet west and the scattering function of cometary dust.

E P Ney, K M Merrill

Science (New York, N.Y.)

|December 3, 1976

Summary

Researchers studied Comet West dust properties using infrared observations. The dust particles are likely 1-micron dielectric grains, with forward-scattering properties indicating their size and composition.

Area of Science:

Cometary Science
Dust Physics
Infrared Astronomy

Background:

Cometary dust plays a crucial role in understanding solar system formation.
Previous studies have characterized cometary dust composition and size distribution.
Comet West (1975n) offers a unique opportunity to study dust properties.

Purpose of the Study:

To determine the scattering phase function of dust in Comet West.
To infer the size and composition of cometary dust particles.
To correlate dust behavior with cometary fragmentation events.

Main Methods:

Infrared observations of Comet West across wavelengths from 0.5 to 18 microns.
Analysis of scattered light and thermal emission from the cometary coma.

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Modeling of the scattering phase function based on observational data.

Main Results:

The scattering phase function of Comet West dust is strongly peaked in the forward direction.
The dust particles are identified as dielectric grains with radii around 1 micron.
Sudden increases in coma brightness correlate with predicted comet fragmentation times.

Conclusions:

Cometary dust particles in Comet West exhibit forward-scattering properties consistent with 1-micron dielectric grains.
Observed brightness variations suggest fragmentation events influenced dust release and coma properties.
This study enhances our understanding of cometary dust dynamics and evolution.