| 单词 | eos family |
| 释义 | Eos familyEos family(ee -os) A Hirayama family of asteroids located at a distance of 3.0 AU from the Sun. The members are unusual and their color lies between that of C-type and S-type asteroids. Their reflection spectra are very similar to chondrite meteorites. Observations of spin rates indicate that the family is old. |
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