# J. Allen Hynek · Person

> Ohio State University astronomer and the Air Force's astronomical consultant to Projects Sign, Grudge and Blue Book. In Incident 88: the Hackensack disc…

Source: https://mysteriesdept.com/mysteries/incident-88/people/FIG0DFY5XAS1N3J/j-allen-hynek  
Publisher: Mysteries Department  
Licence: CC BY 4.0 (credit Mysteries Department and link the page)  

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[Incident 88: the Hackensack disc, 3 August 1947](https://mysteriesdept.com/mysteries/incident-88)[People](https://mysteriesdept.com/people)J. Allen Hynek

Person · in 1 mystery

# J. Allen Hynek

Ohio State University astronomer and the Air Force's astronomical consultant to Projects Sign, Grudge and Blue Book. **1910–1986.**

[Incident 88: the Hackensack disc, 3 August 1947](https://mysteriesdept.com/mysteries/incident-88)[1 event][2 sources]

Hynek reviewed the early Project Sign incident summaries for astronomical explanations. On Incident 88 he wrote that no astronomical interpretation could be given and that the information was too meagre to say more, and the Grudge report's incident index lists it as unexplained for lack of evidence [@usaf1947incident88] [@grudge1949report]. On the Wildwood case, Incident 50, he judged the one corroborated sighting most probably a slow-moving fireball [@usaf1948incident50].

## In the mysteries

**Incident 88: the Hackensack disc, 3 August 1947**

Ohio State University astronomer and the Air Force's astronomical consultant to Projects Sign, Grudge and Blue Book. · 1 event

[The mystery ](https://mysteriesdept.com/mysteries/incident-88)

[What did the three witnesses see over Hackensack on the evening of 3 August 1947?](https://mysteriesdept.com/mysteries/incident-88/questions/QST0DFY739G80E5/what-did-the-three-witnesses-see-over-hackensack-on-the)Open: 3 answers, none ahead

[Why is the Air Force's record of the Hackensack sighting so much thinner than the FBI's?](https://mysteriesdept.com/mysteries/incident-88/questions/QST0DFY73YQ65H3/why-is-the-air-forces-record-of-the-hackensack-sighting-so)Open: 2 answers, none ahead

## What J. Allen Hynek did 1

Aug 1949[The Grudge report's incident index rates Incident 88 unexplained for lack of evidence](https://mysteriesdept.com/mysteries/incident-88/events/EVT0DFY6D9QKP7T/the-grudge-reports-incident-index-rates-incident-88)

## Sources 2

[Location: Hackensack, New Jersey – Date: August 1947 – Incident Number: 88 (Project Blue Book case file)](https://mysteriesdept.com/sources/SRC0DFY3MDQGA59/location-hackensack-new-jersey-date-august-1947-incident)

SRC

[Unidentified Flying Objects: Project "Grudge" (Technical Report No. 102-AC-49/15-100)](https://mysteriesdept.com/sources/SRC0DFY3W8N6XV5/unidentified-flying-objects-project-grudge-technical-report)

SRC

## Cite it

```
Mysteries Department. (2026). J. Allen Hynek [Person FIG0DFY5XAS1N3J]. https://mysteriesdept.com/r/FIG0DFY5XAS1N3J
```

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Key

**FIG** 0DFY5XAS1N3J

Record

Person

Born

1910-05-01

Died

1986-04-27

Occupation

astronomical consultant, Project Sign and Project Grudge

Identity

American astronomer, Air Force UFO consultant 1948-1969

In

[Incident 88: the Hackensack disc, 3 August 1947](https://mysteriesdept.com/mysteries/incident-88)

Version

1

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