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Archive case record

Derby, Colorado, September 1958

Date of account
1958-09
Location
Derby, Colorado
Source
uap_archive
Record updated
2026-10-10

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Record summary

Project Blue Book case file indexed from National Archives metadata; page-level review pending.

Published source text

Read the available text below. Archive transcriptions may contain OCR errors; later context is labelled separately. A recorded claim is not a finding that it happened.

Source page 1

Source text · mention only

PROJECT 10073RECORDCARD 1.DATE 2.LOCATION 12.CONCLUSIONS 口 Was Balloon Sop-20 0ct 58 Derby, Colorado 口 Probably Balloon 口 Possibly Balloon J.DATE-TIME GROUP 4.TYPE OF OBSERVATION 口 Was Aircraft Local Ground-Visual Ground-Radar 口 Probably Aircraft Air-lntercept Radar 口 Possibly Aircraft GMT. AirVisual S.PHOTOS 6.SOURCE 口 Was Astronomical ：. 口 Probably Astronomicol ONo 口 Possibly Astronomical Civilsan 7.LENGTH OF.OBSERYATION 8.NUMBER OF OBJECTS 9.COURSE 口 口 insufficient Deto for Evaluation 口 Unknown 3/A one N/A O.BRIEF SUMMARY OF SIGHTING 11.COMMENTS hoto taken of B-47 vapor trail roveled Red dot was detormined to be po. dot which was not toticed whon a perioration of one or two icture was tahen. layers of ehulsion. ATIC FORM 329 (REV 26SEP 52)

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