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Archive case record

Hanna City AFS, Illinois, April 1961

Date of account
1961-04
Location
Hanna City AFS, Illinois
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 10073RECORD CARD 1.DATE 2.LOCATION 12.CONCLUSIONS 20Apr61 Hanna City AFS,Illinois 口 WasBalloon Probably Balloon 3.DATE-TIMEGROUP 4. TYPEOFOBSERVATION 口 PossiblyBalloon Local 1820 Ground-Visual Ground-Radar 口 Was Aircraft 21/0020Z Apr61 口 ProbablyAircraft GMT. DAirViwol Air-Intorcept Radar 口 PossiblyAircroft 5. PHOTOS 6.SOURCE 口 WasAstronomical "ilitary 口 ProbablyAstronomical 口 PossiblyAstronomical 7.LENGTH OF OBSERVATION 8.NUMBEROFOBJECTS 9.COURSE 口 Other. 口 InsufficiontData forEvaluation 1hr4min One 口 Unknown 10.BRIEF SUMMARY OF SIGHTING 11. COMMENTS bject at very altitude picked up on Radar analyists believed object to be radar. leiznt estimated at 97,000 ft on balloon.The bahavior of the target bearing O96 derre s.Disappeared at10,000 (speed,rate cf descent,and evident ft after slow descant on heading of 095 ceg. size oftarget)ail point to this Descent at lO nm variation. conc

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