Asaph Hall

Asaph Hall
Hall at the USNO in 1899
Born(1829-10-15)October 15, 1829
DiedNovember 22, 1907(1907-11-22) (aged 78)
Alma materNew-York Central College, McGrawville
OccupationAstronomer
Known forDiscovery of the two moons of Mars
Spouses
(m. 1856; died 1892)
Mary Gauthier
(m. 1901)
Children4, including Asaph Hall, Jr. and Percival Hall
Signature

Asaph Hall III (October 15, 1829 – November 22, 1907) was an American astronomer who is best known for having discovered the two moons of Mars, Deimos and Phobos, in 1877.[1] He determined the orbits of satellites of other planets and of double stars, the rotation of Saturn, and the mass of Mars.

  1. ^ Blunck, Jürgen (2009). "The Satellites of Mars; Discovering and Naming the Satellites". Solar System Moons: Discovery and Mythology. Springer. p. 5. ISBN 978-3-540-68852-5.