A three-color photometry of the eclipsed moon was carried out with a 12-inch reflector during the total eclipse on December 30. 1963. In order to examine the intensity and color distribution of refracted light in the umbral region, the observation was centered at Mare Crisium during the course of the eclipse. The decrease in brightness was found to be about 16 magnitudes for each of the three colors, and no significant reddening effect was observed during the totality. The magnitude differences between different colors appear to be nearly the same on the uneclipsed and the totally eclipsed moon.
Proceedings of the Iowa Academy of Science
©1964 Iowa Academy of Science, Inc.
Zink, John R. and Matsushima, Satoshi
"Three Color Photometry of the Total Eclipse of the Moon, December 29, 1963,"
Proceedings of the Iowa Academy of Science, 71(1), 413-417.
Available at: https://scholarworks.uni.edu/pias/vol71/iss1/60