Immaculate Constellation (IMCON)
Immaculate Constellation, abbreviated IMCON, is alleged to be a US Unacknowledged Special Access Program (USAP) established in 2017 for the purpose of surveilling non-human craft and derivative technologies — including alleged alien reproduction vehicles (ARVs) — operating within or near US and allied airspace. The program was first publicly described in a report authored by Matthew Brown, which referenced NRO Sentient as a key intelligence resource underpinning IMCON's collection architecture. IMCON is characterized as a reactive surveillance program designed to monitor phenomena already known to the government, as distinct from the much older UFO legacy retrieval programs alleged to have operated since at least 1947.
The timing of IMCON's establishment — shortly after the 2016 core buildout of NRO Sentient — is treated by UAP researchers as non-coincidental, suggesting that Sentient's analytical capabilities enabled the creation of a dedicated surveillance mission targeting non-human craft. IMCON reportedly draws on both tasked and non-tasked NRO (National Reconnaissance Office) satellite constellations as well as space-based OPIR (Overhead Persistent Infrared) systems through the JOPC (Joint Overhead Persistent Infrared Center). An example of alleged IMCON-type collection described in the video is a space-based OPIR recording of a saucer-shaped craft approximately 210–420 feet in diameter over Indo-Pacific Command that reversed direction upon apparently detecting observation. IMCON is explicitly not described as a UFO recovery program — it is a collection and surveillance program operating on top of a separate legacy program infrastructure.
Triangular ARV Designation
On November 13, 2024, during the fall UAP hearings, the Immaculate Constellation report was released to Congress and the American public. The report's historical data, tracking back to 2009, described a large equilateral triangle appearing directly over intelligence-collecting vessels, captured by Indo-Pacific Command (INDOPACOM). The triangle hovered and rotated slowly 500 to 1,000 meters above the ocean, with three bright points visible at each bottom corner. At least some of the triangles — among the rarest UAP configurations reported in the IMCON report — have been confirmed by the USAP to be ARV (alien reproduction vehicles), the same term used by program members to label the flux liner saucer observed by Brad Sorenson at the 1988 Norton Air Force Base show. Representative Eric Burlison confirmed to UAP Gerb he had heard the term ARV previously from within the UFO community.