This 13,000 years old satellite were known as Black Knight Satellite, according to the stories, the signal was discover first by Nicola Tesla, it was repeating signal that coming from the space. but not until 1954 the satellite explanation were mention for that signal. but in the 50’s it was believe there were two satellite orbiting the earth but during that time there is no man-made satellites had been launched. it was In 1973 the Scottish writer Duncan Lunan analyzed the data from the Norwegian radio researchers, coming to the conclusion that they produced a star chart pointing the way to Epsilon Boötis, a double star in the constellation of Boötes. Lunan’s hypothesis was that these signals were being transmitted from a 12,600 year old object located at one of Earth’s Lagrangian points. but later he withdrew it because of the flawed data. it was in 1998 during the STS-88 mission An object had photographed has been widely claimed to be this “alien artifact”. However, it is more probable that the photographs are of a thermal blanket that had been lost during an EVA. Alternatively, people analyzing these pictures have suggested that it could be the Pakal Spacecraft, a supposed Mayan spacecraft written about by controversial pseudoarchaeological author Erich von Däniken. majority of people discredit this story as hoax and others still believe there is an alien satellite out in the earth orbit. You will be the judge.