PROJECT BLUE BOOK

UNIDENTIFIED FLYING OBJECT CASE FILES · 1947 – 1969

CASE REFERENCE6961720

DATE OF SIGHTINGJuly 1957

REPORTED LOCATIONCheyenne Wyoming

FRAMES2

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Transcribed Frames

FRAME 001 / 002tesseract-200dpi

PROJECT 10073 RECORD CARD

ATIC FORM 329 (REV 26 SEP 52)

“L. DATE 2. LOCATION ~ 192. CONCLUSIONS
0 Was Bolleon
15 Ju 1957 Chaveanns.wvroni 7 os Becetr ots ae
3. DATE-TIME GROUP 4. TYPE OF OBSERVATION =— )
ve 1157 NST “22 Ground: Vi suol © Ground-Reder 2 Bicbakle aus —n
CMT__ sf 1357Z 0 Air Vi sual D Air-intercept Rooor GO Possibly Aircrafts
5. PHOTOS 5. SOURCE GO Was Astronomicol
| O Yes GO Probedly Astronomical
DNe Civilian CG Possibly Astronomical
7. LENGTH OF OBSERVATION 18. NUMBER OF OBJECTS | 9. COURSE CX OrherContrails
0D Insufficiens Oote for Evaluation
GO Unknown
nutes one | % to E
(0. BRIEF SUMMARY OF SIGHTING 1}. COMMENTS
Vapor traii arc developed as a very} Nothing unusual about this;
faint & narrow trail, Pattern showed traiis otten 2E 1 plane
2 full 180 der turn &® formed in about] not visible due to hivh altit
i~ Seconds. No obj visidie. Crosses
developed progressively with formatioi
|} of the trail, Within 1/2 mile a
econd trail develoved moving W to E
in 2 straight line.

FRAME 002 / 002tesseract-200dpi

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Diet Ph As |
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pWLY / | 18 July 1957 ra
Subject: Ground observation of unusual vapor trails

To: Commander '
Air Detence Command
Ent Air Force Base
Colorado Springs, Colo.

Date of observation: 16 July 1957
Time of observation: 1157 MST (1857 Greenwich)

Location: Cheyenne, Wyoming
Condition of sky: Scattered broken clouds in two strata at 8000 and 15000

Point of observed trails: Near the zenith.

Description: Vapor trail arc developed as a very faint and narrow
trail. Pattern showed a full 180 degree turn and formed in about ww
twelve seconds, No plane or object visible ahead of trail. Unusual
pattern developed from what appeared to be vapor trails which

developed at right angles to the arcas shown below, These crosses
developed progressively with the formation of the trail but appeared
wider then the trail itself. Within about a half minute a second trail ’
developed moving from west to east ina straight line, The trails

disappeared within five minutes,

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’ Cheyenne, Wyoming.