Concept
Apparent Magnitude
How bright an object looks from Earth.
A logarithmic measure of an object's apparent brightness as seen from Earth; smaller numbers are brighter (the Sun is −26.7, faintest naked-eye stars about +6).
Overview
A logarithmic measure of an object's apparent brightness as seen from Earth; smaller numbers are brighter (the Sun is −26.7, faintest naked-eye stars about +6).
See also
Apparent & Absolute Magnitude
How astronomers measure brightness.
Altitude
Angle of an object above the horizon.
Hour Angle
How long until/since an object crossed the meridian.
Parallax
Apparent shift of a nearby object against a distant background.
Radial Velocity
An object's velocity along the line of sight.
Absolute Magnitude
Intrinsic brightness on a standard scale.