1986July 21, 2023<July 21, 2023 11/10/1986 23:55 Sighting in Grass Valley (Outside Of), CA, United States by UFODB Sighting time, date & location On 11/10/1986 at 23:55 a Disk was sighted in Grass Valley (Outside Of), CA, United States. Latitude: 39.2191667 Longitude:…