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Close encounter

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Title: Close encounter  
Author: World Heritage Encyclopedia
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Subject: List of reported UFO sightings, Kelly–Hopkinsville encounter, Ufology, List of alleged extraterrestrial beings, Voronezh UFO incident
Collection: Alleged Ufo-Related Entities, Ufology
Publisher: World Heritage Encyclopedia

Close encounter

In ufology, a close encounter is an event in which a person witnesses an unidentified flying object. This terminology and the system of classification behind it was started by astronomer and UFO researcher J. Allen Hynek, and was first suggested in his 1972 book The UFO Experience: A Scientific Inquiry.[1] He introduced the first three kinds of encounters; more sub-types of close encounters were later added by others, but these additional categories are not universally accepted by UFO researchers, mainly because they depart from the scientific rigor that Hynek aimed to bring to ufology.[2]

Sightings more than 500 feet (150 m) from the witness are classified as "Daylight Discs," "Nocturnal Lights," or "Radar/Visual Reports."[3] Sightings within about 500 feet are subclassified as various types of "close encounter." Hynek and others[4] argued a claimed close encounter must occur within about 500 feet to greatly reduce or eliminate the possibility of misidentifying conventional aircraft or other known phenomena.

Hynek's scale became well known after being referenced in a 1977 film, Close Encounters of the Third Kind, which is named after the third level of the scale. Posters for the film recited the three levels of the scale, and Hynek himself makes a cameo appearance near the end of the film.


  • Hynek's scale 1
    • Nocturnal Lights 1.1
    • Daylight Discs 1.2
    • Radar-Visual 1.3
    • Close Encounters of the First kind 1.4
    • Close Encounters of the Second kind 1.5
    • Close Encounters of the Third kind 1.6
      • Bloecher subtypes 1.6.1
  • Extensions of Hynek's scale 2
    • Close Encounters of the Fourth kind 2.1
    • Close Encounters of the Fifth kind 2.2
    • Close Encounters of the Sixth kind 2.3
    • Close Encounters of the Seventh kind 2.4
  • See also 3
  • References 4

Hynek's scale

Hynek devised a sixfold classification for UFO sightings:[5][6] They are arranged according to increasing proximity.

Nocturnal Lights

Lights in the night sky.[7]

Daylight Discs

UFOs seen in the daytime, generally having discoidal or oval shapes.[8]


UFO reports that seem to have radar confirmation. Though seeming to offer harder evidence of physical reality, the vagaries of radar propagation often make the ascription ambiguous.[9]

Close Encounters of the First kind

Visual sightings of an unidentified flying object seemingly less than 500 feet away that show an appreciable angular extension and considerable detail.[10]

Close Encounters of the Second kind

A UFO event in which a physical effect is alleged. This can be interference in the functioning of a vehicle or electronic device; animals reacting; a physiological effect such as paralysis or heat and discomfort in the witness; or some physical trace like impressions in the ground, scorched or otherwise affected vegetation, or a chemical trace.[10]

Close Encounters of the Third kind

UFO encounters in which an animated creature is present. These include humanoids, robots, and humans who seem to be occupants or pilots of a UFO.[11]

Bloecher subtypes

The UFO researcher Ted Bloecher proposed six subtypes for the close encounters of the third kind in the Hynek's scale.[12]

A: An entity is observed only inside the UFO.
B: An entity is observed inside and outside the UFO.
C: An entity is observed near to a UFO, but not going in or out.
D: An entity is observed. No UFOs are seen by the observer, but UFO activity has been reported in the area at about the same time.
E: An entity is observed, but no UFOs are seen and no UFO activity has been reported in the area at that time.
F: No entity or UFOs are observed, but the subject experiences some kind of "intelligent communication".

Subtypes D, E, and F may be unrelated to the UFO phenomenon.

Extensions of Hynek's scale

Close Encounters of the Fourth kind

A UFO event in which a human is abducted by a UFO or its occupants.[13] This type was not included in Hynek's original close encounters scale.[14]

Hynek's erstwhile associate Jacques Vallee argued in the Journal of Scientific Exploration that a CE4 should be described as "cases when witnesses experienced a transformation of their sense of reality", so as to also include non-abduction cases where absurd, hallucinatory or dreamlike events are associated with UFO encounters.[15]

Close Encounters of the Fifth kind

A UFO event that involves direct communication between aliens and humans.[13] This type of close encounter was named by Steven M. Greer's CSETI group and is described as bilateral contact experiences through conscious, voluntary and proactive human-initiated cooperative communication with extraterrestrial intelligence.[16] [17]

Close Encounters of the Sixth kind

Death of a human or animal associated with a UFO sighting, although some might consider this as a more severe example of a second-kind encounter.[18][19]

Close Encounters of the Seventh kind

The creation of a human/alien hybrid, either by sexual reproduction or by artificial scientific methods.[18]

See also


  1. ^ Hynek, Allen J. (1998) [First published 1972]. The UFO Experience: A Scientific Inquiry. Da Capo Press.  
  2. ^ Clark, Jerome (1998). The UFO Book. Detroit: Visible Ink Press. 
  3. ^ Hynek, 1972, 1998, p. 6
  4. ^ Hynek, 1972, 1998, p. 20; see also the program UFO Hunters episode "Alien Contact" aired on 23 April 2008 on the History Channel.
  5. ^ Steven J. Dick (28 December 1999). The Biological Universe: The Twentieth Century Extraterrestrial Life Debate and the Limits of Science. Cambridge University Press. pp. 309–.  
  6. ^ Donald Goldsmith; Tobias C. Owen (April 2001). The search for life in the universe. University Science Books. pp. 521–.  
  7. ^ J. Allen Hynek, The UFO Experience: A Scientific Enquiry, Ballantine Books, 1972, p. 41.
  8. ^ J. Allen Hynek, The UFO Experience: A Scientific Enquiry, Ballantine Books, 1972, p. 59.
  9. ^ J. Allen Hynek, The UFO Experience: A Scientific Enquiry, Ballantine Books, 1972, pp. 80-1.
  10. ^ a b J. Allen Hynek, The UFO Experience: A Scientific Enquiry, Ballantine Books, 1972, pp. 98-9.
  11. ^ J. Allen Hynek, The UFO Experience: A Scientific Enquiry, Ballantine Books, 1972, p. 158.
  12. ^ Hendry, Allan (August 1979). The UFO Handbook: A Guide to Investigating, Evaluating and Reporting UFO Sightings. Doubleday.  
  13. ^ a b What're close encounters of the first, second, third, fourth and fifth kind?. S.P.S. Jain. The Times of India. 22 March 2003. Retrieved 4 April 2014.
  14. ^ The UFO Experience: A Scientific Enquiry. 1972.  
  15. ^ Vallee, Jacques. "Physical Analysis in Ten Cases of Unexplained Aerial Objects with Material Samples." 1998. Journal of Scientific Exploration. Vol. 12, No. 3., pp. 359-375. URL accessed 23 August 2009
  16. ^ Haines, Richard (1999). "CE-5 Close Encounters of the Fifth Kind.". Sourcebooks, Inc. 
  17. ^ McCarthy, Paul (December 1, 1992). "Close encounters of the fifth kind. (communicating with UFOs)". Omni (magazine). Archived from the original on 2007-05-12. Retrieved 2007-05-12. 
  18. ^ a b Judith Joyce, The Weiser Field Guide to the Paranormal: Abductions, Apparitions, ESP, Synchronicity, and More Unexplained Phenomena from Other Realms 2010, pp. 7.
  19. ^ Stuart A. Kallen, Aliens (Monsters, and Mythical Creatures) 1995, pp. 24.
  • "Close Encounters with Extra-terrestrials". BBC - h2g2. 19 May 2003, updated 25 April 2010. 
  • """C.D.B. Bryan of "Close Encounters Of The Fourth Kind. Retrieved 2007-02-13. 
  • "close encounters". Retrieved 2007-03-22. 
  • "UFOLOGY Resource Center". Archived from the original on 2007-03-21. Retrieved 2007-04-12. 
  • "UFO.WHIPNET.ORG". Retrieved 2009-11-04. 
  • "The Black Vault Encyclopedia Project". Retrieved 2009-11-04. 
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