Historedia
Person

Manuel John Johnson

Events
1
Episodes
2
Years
1832–1839

Every event in Historedia whose sources name Manuel John Johnson, 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. Thomas Henderson publishes first parallax measurement of Alpha Centauri

    1832–1839

    Role: Informant

    1. 1832-1833 · Royal Observatory, Cape of Good HopeObservation Period

      Henderson conducted exacting positional observations of Alpha Centauri AB between April 1832 and May 1833 to determine its parallax.

    2. 1839 · Royal Observatory, Cape of Good HopePublication

      Henderson published his parallax results in 1839, following Bessel's 1838 publication on 61 Cygni.

Sources

  1. Alpha Centauri Wikipedia, revision of 2026-10-03
  2. Thomas Henderson (astronomer) Wikipedia, revision of 2026-08-29