Standard stars

M67 Dipper Asterism

The Dipper Asterism in the open cluster M67 contains a a photometric color sequence, and hence serves as a convenient field for photometric calibration. Stars forming a photomeric sequence are marked below and their BVRI magnitudes can be found in Chevalier, C & Ilovaisky, S.A. 1991, A& AS, 90, 225



Landolt standard stars
Landolt, A.U. 1992, AJ, 104, 340


Last Update:
26-11-2008 a las 16:24 by

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