Rawlins, Wyoming, USA — 29 July 1878
Unidentified planetoid observed by two astronomers
Professor Watson has observed a shining object at a considerable distance from the sun during the total eclipse. A confirmatory observation was made by Professor Swift of Denver, Colorado. Astronomer Lockyer commented: “There is little doubt that an IntraMercurial planet has been discovered by Professor Watson.”
Source: Lewis Swift, “Discovery of Vulcan,” Nature 18 (19 September 1878): 539. Also The Observatory 2 (1878): 161-2 and J. Norman Lockyer: “The Eclipse” Nature 18 (29 August 1878): 457-62, at 461. 497. Case: W448