Detroit, MichiganMay 1957

Insufficient Data

Summary

On May 30, 1957, a military radar operator at a site near Detroit, Michigan, observed a well-defined blip on radar scope. The object appeared about two jet aircraft in size and faded from scope approximately 30 seconds after initial sighting. When last observed, the object was on a 185 degree course. Distance at initial pickup was approximately 70 nautical miles. The object faded at 80 nautical miles. Estimated speed was approximately 1200 knots. The Air Force concluded it was likely an unidentified aircraft.

Reported location

Detroit, Michigan

Date of incident

May 1957

State / country

MI / US

Page count

3 scanned pages

USAF evaluation

unknown

Microfilm

T1206, Roll 27

Original case file scans

Original case file · scanned by NARAPage 1 of 3

View transcribed text

PROJECT 10073 RECORD CARD

1. DATE | 2. LOCATION | 12. CONCLUSIONS
30 May 1957 | Detroit, Michigan | B Was Balloon
 | | D Probably Balloon
3. DATE-TIME GROUP | 4. TYPE OF OBSERVATION | D Possibly Balloon
Local _____ | Ground-Visual X Ground-Radar | B Was Aircraft
GMT 20/1501Z | Air-Visual | Air-Intercept Radar | D Probably Aircraft
5. PHOTOS | 6. SOURCE | D Possibly Aircraft
Yes | Military | B Was Astronomical
No | | D Probably Astronomical
7. LENGTH OF OBSERVATION | 8. NUMBER OF OBJECTS | 9. COURSE | D Possibly Astronomical
30 seconds | one | | D Other
 | | | D Insufficient Data for Evaluation
10. BRIEF SUMMARY OF SIGHTING | 11. COMMENTS | D Unknown
Object appeared as well-defined blip about two jet a/c size. Object faded from scope approx 30 seconds after initial sighting. When last observed Obj was on 185 dgr course. Distance at initial pick up was approx 70 nautical miles. Obj faded at 80 nautical miles. Est speed approx 1200 knots. | It is likely that this sighting was due to an unidentified a/c.

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Source: National Archives Catalog · NAID 28969994