Discovered by Johann Palisa Minor planet category Main belt (Eos) Aphelion 3.3249 AU (497.40 Gm) Orbits Sun Named after Eos Discovery site Vienna Observatory | Discovery date 18 January 1882 Observation arc 130.21 yr (47561 d) Discovered 18 January 1882 Discoverer Johann Palisa Asteroid family Eos family | |
Perihelion 2.69594 AU (403.307 Gm) Similar Asteroid belt, 153 Hilda, 220 Stephania, 158 Koronis, 170 Maria | ||
221 Eos /ˈiːɒs/ is a large main-belt asteroid that was discovered by Johann Palisa on January 18, 1882, in Vienna. In 1884, it was named after Eos, the Greek goddess of dawn, to honour the opening of a new observatory that was hoped to bring about a new dawn for Viennese astronomy.
Based upon its spectral characteristics, this object is classified as a K-type asteroid. The orbital properties show it to be a member of the extensive Eos asteroid family, which is named after it.
References
221 Eos Wikipedia(Text) CC BY-SA