The temperature calibration of stars by photometric parameters and spectral type is discussed, using the catalogue data of Cayrel de Strobel et al. (1985) and Morel et al. (1976). The H-R diagrams and the mass-luminosity relation of stars in this catalogue are presented in the [log(L/M)-log T e ]-and [ M b o l -log(L/M)]-planes, respectively, discussing the age of main sequence (MS) stars and giant stars. The age-metallicity relation of the nearby stars suggests the initial rapid enrichment of metal abundance.

ABSTRACT
I. INTRODUCTION
II. HOMOGENIZATION OF METALLICITY DATA
III. RELATIONS OF EFFECTIVE TEMPERATURE WITH OTHER PARAMETERS
IV. H-R DIAGRAM
VI. AGE AND MASS
VII. CONCLUSION
REFERENCES

• LEE SEE-WOO(Department of Astronomy, Seoul National University)
• CHOE SEUNG-URN(Department of Earth Science, Seoul National University)