Sonoma, CaliforniaMarch 1955

Unidentified

Summary

In March 1955, near Sonoma, California, an observer reported one object about the size of a dime held at arm's length. It was silvery white. The observer thought it looked like a balloon of some sort. A separate report described an object about the size of a dime, silver in color, drifting overhead for about 30 seconds until it passed behind clouds.

No further investigation was authorized.

The Air Force listed the object as possibly a balloon. The case is recorded under Project 10073, the Air Force's official record for unidentified flying object reports.

Reported location

Sonoma, California

Date of incident

March 1955

State / country

CA / US

Page count

3 scanned pages

USAF evaluation

unidentified

Microfilm

T1206, Roll 22

Original case file scans

Original case file · scanned by NARAPage 1 of 3

View transcribed text

. TTI TEE
F
} :
UFCB INDEX CARD
1. DATE ( 2. LOCATION ( 112. CONCLUSIONS |
e |o “os Balloon : !
_OmMarch 1955 ~~ | Sonoma, Califormda = DO _Brobably Ballcon |
3. DATE-TIME GROUP 4. TYPE OF OBSERVATION Be Possibly Balloon
|
{iz y 2 0 Was Aircraft |
fiocal ioe ; 0 Ground-Visuval 0 Ground-Radar Q Probably Aircraft |
GMT. & Air- Visual 0 Air-Intercept Radar Re Possibly Aircraft
5. PHOTO? 0333 ad Hax 73 8. SOURCE lo Was Astronomical |
O Yes {3 Probably Astronomical
0 No | 0 Possibly Astronomical
7. LENGTH OX OBSERVATION | 8. 10iw¥Rimngs (exbadentJourse (0 Other... | |
O Insufficient Data for Evaluation
| O Unknown
i focrox 30 sscords | ena (1) | WER TR RE VE RE A SO
10. BRIEF SUMMARY OF SIGHTING | COMMENTS |
one (1) cojeos, the size cf a dime hald ab ara'am Possibly balloon, No further
longth, silvery white, Appearsd Lo the investigation emthorizad by this
Cosarver 28 a balloon of soma sorb, eragrmization (4602d AISS)
AISOP Form 5 (15 Oct 54) Rm

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Source: National Archives Catalog · NAID 28961632