visual magnitude

British  

noun

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

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Example Sentences

"Although this is record breaking, the satellite itself is not our only concern. The untracked Launch Vehicle Adapter had an apparent visual magnitude of 5.5, which is also brighter than the International Astronomical Union recommendation of magnitude 7."

From Science Daily

Astronomers make use of several different kinds of magnitude for the stars: the apparent magnitude, as the eye sees it, often called the visual magnitude; the photographic magnitude, as the photographic plate records it, and these are now determined with the highest accuracy; the photovisual magnitude, quite the same as the visual, but determined photographically on an isochromatic plate with a yellow screen or filter, so that the intensity is nearly the same as it appears to the eye.

From Project Gutenberg

The box also includes data that few people other than telescope owners will need, like the RA positioning and the object’s visual magnitude.

From New York Times

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

From Project Gutenberg

The zero-point of the photographic magnitudes is so determined that this magnitude coincides with the visual magnitude for such stars as belong to the spectral type A0 and have m = 6.0, according to the proposal of the international solar conference at Bonn, 1911.

From Project Gutenberg