Editing Danjon scale (section)

{{Short description|Measurement of appearance of lunar eclipse}}
{{citations missing|date=August 2008}}
[[File:Tom Ruen - Lunar eclipses in 2003 (pd).jpg|thumb|right|300px|Two total lunar eclipses in 2003. Their ratings on the Danjon scale would be roughly 2 (left) and 4 (right).]]

The '''Danjon scale''' is a five-point scale useful for measuring the appearance and luminosity of the [[Moon]] during a total [[lunar eclipse]]. It was proposed by [[André-Louis Danjon]] in 1921, when postulating that the brightness of a lunar eclipse was related to the [[solar cycle]].<ref>{{cite journal |title=Relation Entre l'Eclairement de la Lune Eclipsee et l'Activite Solaire |author-link=André-Louis Danjon |last=Danjon |first=A. |journal=L'Astronomie |year=1921 |volume=35 |pages=261–65 |bibcode=1921LAstr..35..261D}}</ref> An eclipse's rating on the scale is traditionally denoted by the letter ''L''.