A secretive Pentagon UFO data retrieval program has been hidden from Congressional oversight since 2017, a new report claims.

Whistleblowers assert the program — codenamed 'Immaculate Constellation' — was established to 'detect' and 'quarantine' the military's best UFO imagery, as well as its best videos, eyewitness testimonies and electronic sensor evidence.

This trove of high quality, multi-sensor UFO data is so tightly held that 'talking about it will put you in the danger zone,' according to a US official who confirmed the leak.

The quite literally 'above top secret' program allegedly sprang into action in the wake of the 2017 leak of three, still-as-yet unexplained US Navy infrared UFO videos.

A Pentagon spokesperson denied the existence of the program Tuesday evening, telling reporters: 'The Department of Defense has no record, present or historical, of any type of SAP [Special Access Program] called 'IMMACULATE CONSTELLATION.''

By law, classified programs like SAPs must be disclosed to the so-called 'Gang of Eight,' which includes the chairs and ranking members of the House and Senate Intelligence Committees and other key lawmakers. 

However, the source of the leaked report, who supplied the document to the independent news site Public, described the program as an 'Unacknowledged Special Access Program' or USAP with unique secrecy privileges.

Reporting in defense publication Jane's Defense first revealed the existence of USAPs decades ago, showing that government officials were authorized to lie publicly to deny their existence. 

Public's anonymous source alleged that such deceptions were now occurring on the issues of non-human intelligence (NHI) and unidentified aerial phenomena (UAP).

'The Executive Branch has been managing UAP/NHI issues without Congressional knowledge, oversight, or authorization for some time, quite possibly decades,' this anonymous whistleblower wrote in their report to Congress. 

The whistleblower who claims to have authored the report to Congress described the 'Immaculate Constellation' USAP as a 'strategic intelligence program' and only one part of how the US military currently deals with its UAP 'problem.'

If proven to be legitimate, the program would show those now infamous Navy UFO videos — known as the Tic Tac, GOFAST, and Gimbal — to be just the tip of the US government's UFO data iceberg. 

'The multitude of wavelengths collected by these sensors [...] have captured UAP characteristics that are difficult or impossible to observe with the human eye alone,' according to the leaked report, allegedly intended for cleared members of Congress.

'Subtle atmospheric effects associated with UAPs are also visible through the sensors employed by the US military and intelligence agencies,' the leaked report added.

'The verifiable chain of custody for UAP IMINT [meaning high-quality 'Imagery Intelligence'] collected by US military assets,' the report continues, 'ensures a high level of confidence in the accuracy and integrity of the data gathered.' 

This alleged, leaked classified report to Congress also described an incident in which a swarm of 'orb' UFOs surrounded an F-22 stealth Raptor, forcing it off course. 

'The F-22 broke trajectory and attempted to evade,' according to the alleged report, 'but was intercepted and boxed in by approximately 3-6 UAPs.'

'One UAP maneuvered in proximity (>12 meters) to the area directly starboard of the cockpit,' as this whistleblower's report described the pilot testimony. 

'There the UAP established a rigid spatial relationship with the F-22, maintaining its exact position and orientation parallel with the F-22's cockpit despite multiple evasive rolls and maneuvers.'

The whistleblower, whose identity is being tightly held for his own safety, according to Public, believes the purpose of the USAP was to hide such amazing encounters. 

In his report to Congress, the source described 'Immaculate Constellation' as 'a means of enforcing internal information security' — capturing new UFO reports 'before they are observed and circulated within the Military Intelligence Enterprise.' 

A second source, a former US intelligence community official, confirmed the authenticity and existence of Immaculate Constellation to Public, stating: 'That program is run out of SEC DEF [Office of the Secretary of Defense].' 

'They don't want to acknowledge it's real,' this intelligence source opined. 'They won't comment on it.'

This source also noted that the simple public utterance of the name 'Immaculate Constellation' would be sufficient to trigger government surveillance of those who publish it, under the Foreign Intelligence Surveillance Act (FISA).

'They enforce the secrecy with a lot of vigor,' this second source asserted.

While still unproven, the explosive claims surrounding the alleged 'Immaculate Constellation' UFO collection program echo comments made publicly by very senior former US intelligence officials.

'I think some of the phenomena we may be seeing,' ex-CIA head John Brennan told reporters in 2021, 'results from something that we don't yet understand and could involve some type of activity that some might say constitutes a different form of life.'