1. The problem statement, all variables and given/known data Given: Spherical blackbody with surface temperature of 30000K radius of 6.0 x 10^9 m located 123pc from earth 2. Relevant equations Find the absolute and apparent bolometric magnitudes 3. The attempt at a solution My camera needs batteries so I cannot post my work, but I will explain what my reasoning and attempts. Please bear in mind this is my first astrophysics class and this is all new to me e.g. I am totally clueless! From the given data I have found the luminosity, distance modulus, radiant flux at the star's surface and the Earth's surface and the peak wavelength. I know what a bolometric magnitude is by definition, but every equation I have seems to need more variables and cannot be solved by a system of equations. I think my key problem is I do not know how to find the star's absolute color magnitudes. My textbook indicates that the star's absolute color magnitudes can be found once the distance from earth is known, but there is no equation given for this. Information that I have been given in the textbook is the UBV filters centered and the effective bandwith. I will screenprint the equations I have used and post them along with the problems I encounter for each one.