Colorado Springs, and Denver, ColoradoDecember 1955

Unidentified

Summary

On December 11, 1955, over Colorado Springs and Denver, Colorado, three people saw one object in the sky. The Greenwich time was 1330Z. The witnesses included military and civilian observers, and all gave the same description.

The object was green with an orange trail. It was much brighter than a jet exhaust. They watched it for about three to five seconds as it moved toward the northwest.

The case is filed under Project 10073, the Air Force's official record for unidentified flying object reports. The card notes there was no separate case file. The Air Force conclusion was that the object was a meteor, as identified by an Air Force captain who was a pilot.

Reported location

Colorado Springs, and Denver, Colorado

Date of incident

December 1955

State / country

CO / US

Page count

1 scanned page

USAF evaluation

unidentified

Microfilm

T1206, Roll 24

Original case file scans

Original case file · scanned by NARAPage 1 of 1

View transcribed text

E i CaN
fede Yo UFOB INDEX CARD ATSS.UFOB-412-55 Eo re ig
3 12: DATE vad : | 2. LOCATION 12. CONCLUSIONS
SFT Colonado aoe
i as Balloon
4 11 December 1955 Colorado Springs, and Denver, O Probably Balison
"| 3. DATE-TIME GROUP 4. TYPE OF OBSERVATION ; £ i hosetbiy-Borloon
] : :
i Local _(uizpz) & Ground-Visual a ih gq Biclidsly Alrerofs 1
| 4 GMT 11/ 13302 Dec 55 | O Air Visual O Air-Intercept Radar |O Possibly Aircraft
4 5. PHOTOS ] 4. SOURCE fig P.4 Was Astronomico eTer Ae
3 0 Yes 5 : O Probably Astronomical :
] Eno Military and Civilian O Possibly Astronomical :
: 7. LENGTH OF OBSERVATION ~~ | 8. NUMBER OF OBJECTS | 9. COURSE, - ° BL OMen ae
: Sai ; ao {gticrent Data for Evaluation
: 3-5 Seconds sy One (1) NW : ge atl lat
~ [10. BRIEF SUMMARY OF SIGHTING 11. COMMENTS ; SE
: Three gobservers, all same description. :
4 One (1), object, green with an orange trail, Definitely identified as meteor by USA
4 much brighter than jet exhaust, Captain (Pilot). :
3 (Wo CASE pW Fil) |
4 AISOP Form 5 (15 Oct 54) Pts ae
1 /

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Source: National Archives Catalog · NAID 28964330