ASTRONOMICAL QUANTITIES A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z                    HOME ABOUT CATEGORIES SITE MAP COPYRIGHT ADVERTISE CONTACT entire Web this site distance modulus The difference between the apparent magnitude (m) of an astronomical object, such as star, and its absolute magnitude (M). The distance modulus is given by m - M = 5 log d - 5 where d is the distance in parsecs. Rearranging this enables d to be calculated from the formula d = 10(m - M + 5)/5 Related category    • ASTRONOMICAL QUANTITIES Also on this site: Encyclopedia of Alternative Energy & Sustainable Living Encyclopedia of History Transport Concepts & Designs (partner site) BACK TO TOP