Asaph Hall

Events

2

Episodes

2

Years

1877

Every event in Historedia whose sources name Asaph Hall, with the role they cite and all of that event’s episodes. This is not a biography, and mentions are grouped by name, so two people with the same name can share this page.

Events and episodes

1. Asaph Hall discovers Deimos, the outer moon of Mars

   1877

   Role: Astronomer

   1. 11877-08-12 · Washington, D.C.Discovery of Deimos

      Asaph Hall discovered Deimos on August 12, 1877, at the United States Naval Observatory in Washington, D.C., using the 26-inch telescope.

2. Asaph Hall discovers Phobos, the inner moon of Mars

   1877

   Role: Astronomer

   1. 218 August 1877 · Washington, D.C.Discovery of Phobos

      Asaph Hall discovered Phobos, the inner moon of Mars, on 18 August 1877 at the United States Naval Observatory in Washington, D.C.

Sources

1. Asaph Hall Wikipedia, revision of 2026-08-31
2. Deimos (moon) Wikipedia, revision of 2026-10-07