THE BLACK KNIGHT SATELLITE

THE CLAIM

That an artificial object of extraterrestrial origin has been in polar orbit around Earth for roughly thirteen thousand years, that it has been detected repeatedly since 1899, and that space agencies have concealed it.

THE THEORY, AS ITS PROPONENTS TELL IT

The claim is best understood as an assembly rather than an observation, and setting out its components is the fastest way to evaluate it.

The parts are: Nikola Tesla's 1899 report of receiving repeating radio signals he thought might be from Mars; the long-delayed radio echoes recorded by Jorgen Hals in Norway in the 1920s; a 1954 story attributed to writer Donald Keyhoe about the Air Force tracking two satellites before any nation had launched one; a 1960 detection of an object in polar orbit; and a photograph from the STS-88 shuttle mission in 1998 showing a dark irregular object.

Proponents combine these into a single continuous object, and the 1998 photograph is what carries the claim visually, because it is a real NASA image of a real dark object apparently in orbit.

The strongest form of the argument is that five independent anomalies spread over a century are unlikely to be coincidence, and that the object in the photograph is manifestly not a natural body.

WHAT IS KNOWN

The components are unrelated and each has an explanation. Tesla's signals are generally attributed to natural radio noise or to terrestrial interference. Long-delayed echoes are a genuine and still partly open ionospheric phenomenon with no connection to a satellite.

The 1954 story was a newspaper item that Keyhoe himself is not reliably established as having originated, and it circulated during an intense period of press speculation ahead of the space age.

The 1960 polar-orbit object was tracked and is generally identified as a piece of a US Discoverer launch, or debris associated with it. Polar orbits were being used from 1959 onward.

The STS-88 object is identified. It is a thermal insulation blanket lost during an EVA on that mission while astronauts were installing hardware. The loss is recorded in the mission's own logs, the object was tracked, and its orbit decayed. NASA's own catalogue of the images identifies them.

EVIDENCE FOR

• The photographs are genuine NASA images of a genuine object.
• Long-delayed radio echoes are a real and incompletely explained phenomenon.

EVIDENCE AGAINST

• The object in the 1998 photographs is a documented lost thermal blanket, recorded in the mission log, tracked, and subsequently deorbited.
• The components of the legend are separated by decades, occur in different phenomena, and have no connection other than having been listed together.
• A large artificial object in a stable polar orbit would be trivially observable by amateur astronomers worldwide, who track satellites as a hobby and have never found it.
• The thirteen thousand year figure has no source at all. It appears in the popular account without derivation.

ASSESSMENT

Debunked, and included as a technique file rather than a topic file. Nothing here is a hoax in the sense of OSA-034: no individual fabricated anything. The legend was built by taking five real and unremarkable things from different decades and listing them as though they were one thing, and the resulting object exists only in the list. That construction method recurs throughout this archive, and this is its purest example, because every component can be handed back to its rightful explanation and nothing remains once they are.

WHAT WOULD CHANGE THE GRADE

• Closed component by component. The 1998 photographs show a thermal insulation blanket lost during an STS-88 EVA, recorded in the mission log, tracked, and subsequently deorbited.
• To reopen: an observation. A large artificial object in stable polar orbit would be trivially visible to the worldwide amateur satellite-tracking community, which has never found it.
• The thirteen thousand year figure has no source. It appears in the popular account without derivation, which is worth noticing about the account.

FURTHER READING

• Black Knight satellite · Wikipedia
• NASA image catalogue, STS-088 EVA imagery · the thermal blanket
• Long delayed echoes · the genuine unexplained phenomenon