Base Information
Volume
V51 - N3 / 2018 Ordinario
Reference
50025:1-14
DOI
http://doi.org/10.7149/OPA.51.3.50025
Language
Spanish
Keywords
Danjon number, Total Lunar eclipse, digital colors, atmospheric optical thickness.
Abstract
The apparent magnitude and chromaticity of the lunar disk during the maximum phase of a total eclipse of the Moon inform about the atmospheric optical thickness and the average column density of aerosols in the Earth's atmosphere. The estimation of the magnitude of the total lunar eclipse has been used for paleoclimatology studies and has been correlated with global volcanic activity; hence the importance of its quantification. However, the qualitative scale used to determine the magnitude and chromaticity, known as Danjon's number, is not sufficient to unambiguously characterize these magnitudes. A methodology is sought to determine a well-defined scalar, which links the Danjon number to the RGB digital color of the photographs, called the Danjon Factor (FD); and the results obtained for all the total eclipses of Luna occurred in the period 2000-2017. It is concluded that the Danjon Factor is an effective measure of the magnitude and chromaticity calculable through the digital RGB color in the Total Lunar Eclipses.
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