  Published reflectance data covering several different wavelength intervals
has been combined and analyzed in order to determine the spherical bolometric
albedo of Mercury. The resulting value of 0.088 +/- 0.003 spans wavelengths
from 0 to 4 {\mu}m which includes over 99% of the solar flux. This bolometric
result is greater than the value determined between 0.43 and 1.01 {\mu}m by
Domingue et al. (2011, Planet. Space Sci., 59, 1853-1872). The difference is
due to higher reflectivity at wavelengths beyond 1.01 {\mu}m. The average
effective blackbody temperature of Mercury corresponding to the newly
determined albedo is 436.3 K. This temperature takes into account the
eccentricity of the planet's orbit (M\'endez and Rivera-Valet\'in. 2017. ApJL,
837, L1).
