unknown location — 4 March 1764
Mystery satellite of planet Venus
The supposed satellite of Venus was observed again as the planet was an evening “star.” Its heliocentric longitude was 59° and its elongation was 30°. There were no less than eight observations of this object during 1764.
Source: “The Problematical Satellite of Venus,” in The Observatory 1 (1884): 222-226. Case: W304