84.
OBAFGKM
This picture compares the spectra of different classifications of star, in the visual range from 400 to 700 nanometers (4000 to 7000 Angstroms). Thirteen regular types are shown, and at the bottom are three special cases, all selected from the spectrophotometric atlas by Jacoby, Hunter and Christian, 1984, which used data from the Kitt Peak National Observatory's 0.9-meter telescope. From top to bottom, the stars and their type are: HD12993, O6.5; HD158659, B0; HD30584, B6; HD116608, A1; HD9547, A5; HD10032, F0; BD 61 0367, F5; HD28099, G0; HD70178, G5; HD23524, K0; SAO76803, K5; HD260655, M0; and YALE 1755, M5. The ...