Table of absolute magnitudes of stars by spectral type and photometric band I would like to find a table where I can, say, look for K5 dwarfs and read off that stars of that type have on average an absolute magnitude of X.XX in the infrared L band and Y.YY in the G band. I've looked everywhere and I can't find a compilation of this kind of information. Does any such thing exist?
There are a couple of standard papers containing the table you want.

Kenyon &amp; Hartmann (1995) http://adsabs.harvard.edu/abs/1995ApJS..101..117K

Table A5 contains many colours for stars as a function of spectral type. You need to combine this with something that gives absolute V magnitude along the main sequence, like that of Schmidt-Kaler (1982).

An alternative, that has colours for both main sequence and pre main sequence stars (though the absolute magnitude of a PMS star is age-dependent) is found in Pecaut &amp; Mamajek (2013).
 http://arxiv.org/abs/1307.2657

Online table at
 http://vizier.cfa.harvard.edu/viz-bin/VizieR-3?-source=J/ApJS/208/9/table5