absolute magnitude
Astronomical term for the intrinsic brightness of a celestial object as seen from a standard distance of 10 parsecs. Contrasts with 視等級 (apparent magnitude).
See also: 視等級
Absolute magnitude is a measure of the true brightness of a celestial body.
太陽の絶対等級は約4.8である。
The absolute magnitude of the Sun is about 4.8.