# Hapke parameter

> English word · Noun

## Definitions
1. Any of a set of parameters for a quasi-experimental model used to describe the directional reflectance properties of the airless regolith surfaces of bodies in the Solar System.

## Etymology
Named after astronomer Bruce Hapke.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/hapke-parameter