Its V -- I color index of 0.96 is typical for D - type asteroids , the most common spectral type among the larger Jupiter trojans .
Iphthime is an assumed C - type asteroid .
Iphthime 's V -- I color index of 0.96 is typical for D - type asteroids , the most common spectral type among the larger Jupiter trojans .
Iphthime is an assumed C - type asteroid .