Historedia
Person

W. Usherwood

Events
1
Episodes
4
Years
1858

Every event in Historedia whose sources name W. Usherwood, 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. Discovery of Comet Donati

    1858

    Role: Portrait Photographer

    1. 1858 · Florence ObservatorySpectroscopic Analysis

      Donati used spectroscopy to determine the comet's gaseous composition, noting changes as it approached the Sun.

    2. 2 June 1858 · Florence ObservatoryDiscovery of Comet Donati

      Donati observed the comet as a magnitude 7 object near Leo on 2 June 1858 at the Florence Observatory.

    3. 27 September 1858 · Walton-on-the-Hill, SurreyFirst Comet Photography

      W. Usherwood photographed the comet on 27 September, marking the first time a comet was photographed.

    4. 28 September 1858 · Harvard College ObservatoryTelescope Photography

      Bond photographed the comet through a telescope on 28 September at Harvard College Observatory.

Sources

  1. Comet Donati Wikipedia, revision of 2026-08-03