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Documentation: LEDA: parameter: mabs

B-Band absolute magnitude

mabs, the B-band absolute magnitude is computed from the corrected magnitude btc and the distance modulus modz (from the redshift) or mod0 (redshift-independent).
For nearby galaxies (v < 500 km/s, modz is not computed because it would be too imprecise (the peculiar motions dominate the Hubble flow), and the absolute magnitude is computed as: For more distant galaxies, it is computed as:
HyperLeda Questions: leda@univ-lyon1.fr