  New angular diameter determinations for the bright southern F8 supergiant
Delta CMa enable the bolometric emergent flux and effective temperature of the
star to be determined with improved accuracy. The spectral flux distribution
and bolometric flux have been determined from published photometry and
spectrophotometry and combined with the angular diameter to derive the
bolometric emergent flux F = (6.50 plus/minus 0.24) x 10^7 W/m^2 and the
effective temperature Teff = 5818 plus/minus 53 K. The new value for the
effective temperature is compared with previous interferometric and infrared
flux method determinations. The accuracy of the effective temperature is now
limited by the uncertainty in the bolometric flux rather than by the
uncertainty in the angular diameter.
