Black Knight Satellite

The Black Knight satellite is claimed by some conspiracy theorists^[2] to be an object approximately 13,000 years old of extraterrestrial origin orbiting Earth in near-polar orbit. 

Critics and mainstream academics have called it a conspiracy theory and myth that combines several unrelated stories.^[3][4] A 1998 NASA photo believed by some to show the Black Knight satellite is thought by experts to be of a thermal blanket lost during an EVA mission.
The origin of the Black Knight legend is often "retrospectively dated" back to natural extraterrestrial repeating sources heard during the 1899 radio experiments of Nikola Tesla^[5] and long delayed echos first heard by amateur radio operator Jorgen Hals in Oslo, Norway in 1928.^[6] According to the Daily Express, "the noises from 1899 and 1928 remain a mystery, but the possible causes do not so far include an alien satellite, according to scientists."^{[2] WIKI}

Photo by NASA - [1], Public Domain, https://commons.wikimedia.org/w/index.php?curid=48688902