PROJECT BLUE BOOK

UNIDENTIFIED FLYING OBJECT CASE FILES · 1947 – 1969

CASE REFERENCE7340141

DATE OF SIGHTINGDecember 1955

REPORTED LOCATION25Miles West Of Denver Colo Bergen Park Colorad

FRAMES2

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Transcribed Frames

FRAME 001 / 002paddle-gpu-200dpi

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TITHHE UFOB INDEX CARD
AISS-UFOB-421-55
1. DATE 2. LOCATION |12. CONCLUSIONS
. 25 miles west of Denver, Colo 0 Was Balloon
31 December 1955 Bergen Park, Colorada 0 Probably Balloon
3. DATE-TIME GROUP 4 TYPE OF OBSERVATION 0 Possibly Balloon
Local Ground-Visual Ground-Radar 0 Was Aircraft
Probably Aircraft
GMT 31/1805% De 55 AirVisual Air-Intercept Radar Possibly Aircraft
5. PHOTOS 6. SOURCE 0 Was Astronomical
Yes 0 Probably Astronomical
No Civilian 0 Possibly Astronomical
7. LENGTH OF OBSERVATION 8. NUMBER OF OBJECTS . COURSE Other.
Overhead, then 000 Insufficient Data for Evaluation
Unknown
Estimated two (2) mimutes One (1) towards north
10. BRIEF SUMMARY OF SIGHTING 11. COMMENTS
One (1) round object, the size of a matchhead The two SOURCES were telephonicaly inter+
held at arms length, estimated to be the viewed by this hq. Both were of chubious
sise of a large type bomber aireraft. It reliability in the opinion of this hq.
was estimated that the object wa. at 40,000' Negative results were Coooareawnor obtained when this 01o
Object was Object was silver in coler described las as hq hq tried to tried to contact pilot of jet a/e contact pilot of jet a/e seen seen
being like aireraft in color.) aireraft in color.) Observers' Observers just before object Was seen. object Was seen. Both SOURCES
attention attracted by jet passing attracted by jet passing overhead, admitted the possibility of the admitted the possibility of the object object
then they they 7 Saw Saw object. It object. It moved slowly at at firsthaving been a high flying g a/e when queried.
and then appeared to gain speed. appeared to gain speed. Speed Speed l esti- esti- Lack of contrail and gain in speed Lack of contrail and gain in speed con-
mated to be from that of jet a/o to l,ooo MPH. vinced the SOURCEs (at time of sighting)
NO CASEIN that the object was not an aircraft.
Resolved d as a POSSIBLE as a POSSIBLE AIRCRAFT
AISOP Form 5 (15 Oct 54) AISOP Form 5
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FRAME 002 / 002paddle-gpu-200dpi

PROJECT 10073 …
1. DATE LOCATION 12. CONCLUSIONS
25 miles west of Denver, Colo 0 Was Balloon
31 Dec 55 Bergen Park, Colorado 0 Probably Balloon 1
DATE-TIME GROUP 4. TYPE OF OBSERVATION 0 Possibly Balloon
Local Ground Visual Ground-Rodar o Was Aiscraft
0 Probably Aircraft
GMT31/1805Z AirVisual Air-Intercept Radar DX Possibly Aircraft
5. PHOTOS 6. SOURCE 0 Was Astronomical
Yes D Probably Astronomical
No civilian D Possibly Astronomical
7. LENGTH OF.OBSERVATION B. NUMBER OF OBJECTS . COURSE 0 Other.
estimated two minutes 0 Insufficient Data for Evqluation
one overhead then D Unknown
towards north
10. BRIEF SUMMARY OF SIGHTING 11. COMMENTS
One round obj, size of match head held at Sources admited the possibility of the
arms length, estimated to be the size of a obj having been a high flying a/c when
large type bomber a/c. It was estimated that queried. POSSIBLE AfC.
the obj was Ob,i silver (like a/c in
color). Observers' attention attracted by jet J
passing overhead, then they saw obj. It moved
slowly at first and then appeared to gain speed. slowly at Iirst and then appeared to gain speed
Speed estimated to be from that of jet a/c at
1,000 mph. .(NO CASE IN FILE) (NO CASE IN FILE)
ATIC PORM 329 (REV ATIC PORM 329 (RE) V 26 SEP 52) 26 SEP 52)
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