Wilmington, DelawareJuly 1957

Insufficient Data

Summary

On July 31, 1957, two people in Wilmington, Delaware saw a round, dime-sized object that appeared white or silver in color. A friend called their attention to it because the object seemed unusual. The witnesses watched it move across the sky at a very high altitude and at very high speed, heading roughly west. The object disappeared into clouds after five to six minutes of observation.

The sighting took place during daylight hours in very cloudy conditions. According to weather data in the file, clouds ranged from scattered to broken layers, with a high overcast at about 6,200 feet. Visibility extended roughly 8 miles. The witnesses reported no distinctive markings on the object.

The Air Force's investigation found no explanation for the sighting. A senior controller at the 34th Air Division (Defense) noted that despite the sighting occurring over a populated area, no other observers reported seeing the object. The file does not indicate that any additional investigation was conducted or that any conclusion was reached about what the object might have been.

The full case file is reproduced below as held by the National Archives, comprising 8 scanned pages.

Reported location

Wilmington, Delaware

Date of incident

July 1957

State / country

DE / US

Page count

8 scanned pages

USAF evaluation

unknown

Microfilm

T1206, Roll 28

Original case file scans

Original case file · scanned by NARAPage 1 of 8

View transcribed text

; PROJECT 10073 RECORD CARD
| i. DATE | 2. LOCATION T12. conclusions 7
/ | o Was Balloon
2 | Ar ae $7 | ws % : An % | —_— 0 Probobly Ballecon
Ce ————————  ————  —— i ee ett ———————— Daa ib H
; | 2. DATE-TIME GROUP | 4. TYPE OF OBSERVATION "TINY Eoieen
]
g SE : ! x : i: O Was Aircraft
Local — eT ERT OQ 'CGround- Visual 0 Ground-Radar 0 Probably Aircrah
| MT AX SR ga 0 Aim Visuol G Air-Intarcept Radar 19 Possibly Aircraft
RE |S PHOTOS | 8. SOURCE {0 Was Astronomical |
| 0 Yes {0 Probably Astronomical |
den a oC edadten Pies ea a O Possibly Astronomical
7. LENGTH OF OBSERVATION 3. NUMBER OF OBJECTS | 9. COURSE FE Dia a
I | | Bx Insufficient Dota for Eveluotion
| 0 Unknown
Bintan 1 cone lnot given fro
| 110. BRIEF SUMMARY OF SIGHTING [11. COMMENTS
g | i
; wd, viewed at an angle that appeared Flight ath, zimuth or sva- | |
: 1+ : : Fag ICEL EE Fs , : Er 8 |
i 1S l A Vaing ) ICT Oval Snape; t10n J } 3 ” 01 | i 1 - |
9 | SE pe Ta : | - : {
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ATIC FORM 329 (REV 26 SEP 52) .
5

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Source: National Archives Catalog · NAID 28970873