Apparent magnitude

the magnitude of a star as it appears to an observer on the earth.
Historical Examples

Thus he looks down, as it were, upon the heaviest seas, and this greatly diminishes their apparent magnitude and elevation.
Rollo on the Atlantic Jacob Abbott

The comet of 1652, so carefully observed by Hevelius, almost equaled the moon in apparent magnitude.
Comets and Meteors Daniel Kirkwood

The inward grace required must not be measured by the apparent magnitude of the burden, but the strength of the sustainer.
Patience James W. Alexander

Its distance then can be determined by contrasting its actual candle power with the apparent magnitude as seen from the earth.
Astounding Stories of Super-Science July 1930 Various

A fast reading with the photocell gave me the apparent magnitude and a comparison with its absolute magnitude showed its distance.
The Repairman Harry Harrison

The apparent magnitude of its nucleus was three times greater than that of Jupiter.
Comets and Meteors Daniel Kirkwood

The apparent magnitude of an object depends upon the angle which it subtends to the eye of the observer.
Wireless Transmission of Photographs Marcus J. Martin

The sun on this scale of comparative brightness is of the -26.7 apparent magnitude.
Astronomy for Young Folks Isabel Martin Lewis

All stars having an apparent magnitude brighter than 4m are directly drawn.
Lectures on Stellar Statistics Carl Vilhelm Ludvig Charlier

There are in all, in the sky, 20 stars having an apparent magnitude brighter than 1m.5.
Lectures on Stellar Statistics Carl Vilhelm Ludvig Charlier

noun
another name for magnitude (sense 4)
apparent magnitude
See under magnitude.

• Apparent movement

noun (psychol) the sensation of seeing movement when nothing actually moves in the environment, as when two neighbouring lights are switched on and off in rapid succession Historical Examples The observer sits with his eye to the telescope, watching the apparent movement of the star. Marvels of Scientific Invention Thomas W. Corbin However, is it […]

• Apparent solar day

the period of time between two successive passages of the sun’s center across the same meridian.

• Apparent temperature

. apparent temperature See heat index.

• Apparent time

Astronomy. local time measured by the hour angle of the sun. Historical Examples The interval, by which apparent time differs from mean time, is called the equation of time. Letters on Astronomy Denison Olmsted It is the relation of the sun’s hour angle to apparent time. Lectures in Navigation Ernest Gallaudet Draper Difference between apparent […]

• Apparent wind

(wind), the velocity of air as measured from a moving object, as a ship.

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