Absolute magnitude from an absolute magnitude in a specific filter band to absolute bolometric magnitude, a bolometric correction is applied. For Solar System bodies that shine in reflected light, a different definition of absolute magnitude (H) is used, based on a standard reference distance of one astronomical unit. In stellar and galactic astronomy, the standard distance is 10 parsecs (about 32.616 light-years, 308.57 petameters or 308.57 trillion kilometres). A star at 10 parsecs has a parallax of 0.1″ (100 milliarcseconds). Galaxies (and other extended objects) are much larger than 10 parsecs, their light is radiated over an extended patch of sky, and
Grimthorpe Handicap Chase Grimthorpe Handicap Chase The Grimthorpe Handicap Chase is a National Hunt handicap steeplechase in England which is open to horses aged five years or older. It is run at Doncaster over a distance of about 3 miles and 2 furlongs and during the race there are 19 fences to be jumped. The race is scheduled to take place each year in late February or early March. Prior to the early 1980s the Grimthorpe Chase was run over two miles and 150 yards. The distance was then upped dramatically nearly doubling to a stamina testing four miles and 100 yards. The