Cisco Grove Incident -- J. Allen Hynek and the CE Classification System

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Cisco Grove Incident -- J. Allen Hynek and the CE Classification System

J. Allen Hynek

Feature Detail
Full name Josef Allen Hynek
Born May 1, 1910; Chicago, Illinois
Died April 27, 1986; Scottsdale, Arizona; age 75
Education Ph.D. in astrophysics, University of Chicago (1935)
Academic positions Chair of the astronomy department, Northwestern University (1956-1960; 1965-1973); Ohio State University earlier
Air Force role Scientific consultant to Project Sign (1948), Project Grudge (1949-1952), and Project Blue Book (1952-1969); his assignment was to provide scientific evaluation of UFO reports
Key publications The UFO Experience: A Scientific Inquiry (1972); The Hynek UFO Report (1977); co-founder of the Center for UFO Studies (CUFOS, 1973)
Evolution Initially a skeptic who provided conventional explanations for many Blue Book cases; over his tenure became increasingly convinced that a genuine phenomenon was being inadequately investigated; by the 1970s he was the leading credentialed scientific advocate for serious UFO research
Close Encounter classification Developed the close encounter classification system, most fully described in The UFO Experience (1972); the phrase "Close Encounters of the Third Kind" was popularized by Steven Spielberg's 1977 film of that name

The Close Encounter Classification System

Hynek's classification system categorizes UFO encounters by distance and nature of observation:

  • Nocturnal Lights: Anomalous lights observed at night; no daylight sighting
  • Daylight Discs: Unusual objects seen during daylight
  • Radar Cases: UFOs detected by radar (with or without visual confirmation)
  • Close Encounters of the First Kind (CE-1): Close visual observation of a craft with no physical effects
  • Close Encounters of the Second Kind (CE-2): Close observation that leaves physical evidence (landing traces, electromagnetic effects, physical effects on witnesses)
  • Close Encounters of the Third Kind (CE-3): Close observation of a craft and associated entities or occupants

The Cisco Grove Case as CE-3

The Cisco Grove Incident is definitively a CE-3: Donald Shrum observed not only the craft but multiple entities (humanoids and robots) associated with it, at close range, over an extended period. The case's specific additional features -- the physical interaction (white vapor, arrow impacts), the 12-hour duration, the secondary aerial corroboration -- make it one of the most extensively documented CE-3 cases of the 1960s.

Hynek's later work, particularly his writing after Blue Book's closure, specifically identified cases of this type -- entity encounters with physically credible witnesses -- as among the most analytically important in the UFO case record, despite being among the most difficult to investigate conventionally.