Comparing the Sun with other stars along the temperature coordinate

The temperature of the sun relative to other stars is determined using high-precision measurements of the ratios of depth of spectral lines. In effect, the sun is placed within the stellar grid of relative temperatures with an estimated uncertainty of ± 10 K. Among others, 16 Cyg A is found to be 5 ± 12 K hotter than the sun, while 16 Cyg B is found to be 45 ± 12 K cooler than the sun. In a similar manner, color indices are inferred with the results that R-I = 0.338 ± 0.002 on the Cousins system and B-V = 0.648 ± 0.006. This latter value supersedes the value of 0.656 published in 1992.