visual magnitude

noun

astronomy the magnitude of a star as determined by visual observation Compare photoelectric magnitude

The photographic magnitude of a star will in these lectures be denoted by m′, corresponding to a visual magnitude m.

The following table contains all stars the apparent visual magnitude of which is brighter than 1m.5.

Sirius and Canopus are the only stars in the sky having a negative value of the apparent visual magnitude.

The bluer the star, the brighter will be its photographic as compared with its visual magnitude.

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