The absolute

*magnitude*can also be approximated using*apparent**magnitude*and stellar parallax : or using*apparent**magnitude*and distance modulus : Rigel has a visual*magnitude*m V of 0.12 and distance about 860*light*-*years*Vega has a parallax of 0.129″, and an*apparent**magnitude*m V of 0.03*Alpha**Centauri*A has a parallax of 0.742″ and an*apparent**magnitude*m V of −0.01 The Black Eye Galaxy has a visual*magnitude*m V of 9.36 and a distance modulus of 31.06 The bolometric*magnitude*M bol, takes into account electromagnetic radiation at all wavelengths. It includes those unobserved due to instrumental passband, the Earth's atmospheric absorption, and extinction by interstellar dust.