argelander's method

argelander's method: \\ˈärgəˌlandərz-, -län-\ noun
Usage: capitalized A

Etymology: after F.W.A. Argelander died 1875 German astronomer

: a method of visual photometry that determines the magnitude of a star or the extent of changes in brightness of a variable star by comparisons with a sequence of neighboring stars of slightly different magnitudes

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589 Croatia — is a minor planet orbiting the Sun, discovered by Dr. August Kopff from Königstuhl Heidelberg Observatory, with the use of the photographic method. In the moment of the discovery, the asteroid was 12,5mv and was in the constellation of Virgo. The … Wikipedia
Variable star — A star is classified as variable if its apparent brightness as seen from Earth changes over time, whether the changes are due to variations in the star s actual luminosity, or to variations in the amount of the star s light that is blocked from… … Wikipedia

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