description 132 Aethra Overview
132 Aethra is a Mars-crossing asteroid discovered by James Craig Watson on 13 June 1873 at Ann Arbor, Michigan. It was the first asteroid recognized as crossing Mars's orbit, was later lost and rediscovered in 1922, and is classified as M-type in the Tholen system; its eccentric, high-inclination orbit takes about 4.22 years, and the asteroid is named after Aethra, the mother of Theseus in Greek mythology.
help 132 Aethra FAQ
Why is asteroid 132 Aethra historically important?
132 Aethra was the first asteroid recognized as crossing Mars's orbit. James Craig Watson discovered it on 13 June 1873 at Ann Arbor, Michigan.
Was 132 Aethra ever lost?
Yes. After its discovery, 132 Aethra was lost and later rediscovered in 1922, making its observation history unusual among numbered asteroids.
What type of asteroid is 132 Aethra?
132 Aethra is classified as an M-type asteroid in the Tholen system. Its orbit crosses the path of Mars, placing it in the Mars-crossing asteroid population.
Where was 132 Aethra discovered?
James Craig Watson discovered 132 Aethra at Ann Arbor, Michigan. The discovery date was 13 June 1873, during the early period of systematic asteroid discovery.
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