"-TYP! Ofl OIURVATION J. 04 T E TIME C~OUJII Locol :-----------0 Gro""d-Vituel VI .e O I _, 12. CONCLUSIOHS C::X Wos Bolloon 0 Prob.,hl y B olloon 0 Poui ~ly B alloon 0 Wot Ahcroft 0 Probahly Aircraft 0 Po ui bl y Ai rcroft s. PHOTOS 6. SOURCE~---------o w.,, Astfonornic ol 0 Prooobl y Astronornle;ol Hili tary 0 Pouibly Aitronornicol I. NUMI!It 0, OtU!CTS 9. COURS! 0 Other -- - 1. LENGTH OP' OBSERVATION 3 t o 4 rninu tcs 1 110. B~IEfl SUMWARY Ofl SIGHTING 11. CO~ENTS ?ilo:, at 1 0 ,000 i't o bservin g o b j ect at all t:.1 r::s E.valu n.tl3cl ~c:lmr his a/c. Object res~mbled kite. Ead e second oo::;ervation bel ol(T left fling tip and obj~ct appear ed a s round a."'ld "'hite . Assumed o'tj.; c t to b~ b alloon. Appe;tr e d r ound, 18 " to 2 ft i.."'l diaT"J~t-;~, .-rhitc or sil vcr. Gave illucd h or spLrmir.g. Pilo t a.t t enpted to clo..:;'J on objeril-. to 0 0 b:o obj ect3 :!.ppro:.-:ima.tely 1 ft r.q:~rt. Cou1i :1ct locate obj~ct \o-me n t ur:1 Jl".J.de for aadition~l ob rvatio:1 0 Insufficient Oot o f.r Ev-luotio" 0 Uni."Own a:3 h:tlloon. AF FORM 112-pA~T I approved I June l&.a Area Reported On Date of Report Prepared by (OffIcer) Report Mo. Leave Sl ank AIR INTELLIGENCE INFORHATIOM REPORT dent ed Ob ect ~ .t Date of information Suary: (Enter concise suMary of report. Olve algnlflcance in f inal ont~-~entance paragraph. list lnc1oaurea at lower left. Begin text of report on AF Form 112--Part II.) The following is a reFOrt. from Capt. Donald K. Slayton, A0-677 597, o f th~ l 33rd Haintenance Squadron, l.J3rd Fighter-Interceptor Wing. This report object, while on concerns a three (3) to four (4) c inute obser1~tion of an dentified a test f light in an F-51 aircraft, on 12 Dece:nber 1951. -c r. Visibility on this day was exceptionally good. Obser vation was at 21 50Z on 12 Dece~ber 1951. Pilot was flyinb at 10 000!, unidentified object was at all times b~1ow the F-51 aircraft. Due to the fact that the aircraft was at 10#000!, no correct est.ima-tl-c>n of distance was obtained. , ia .;or USAF Intell~gence Officer t he ..,unl n9 of t he Etplotu;e Act. 50 u.s.c.--31 J"i 1: u atft4.._ ltt :rsft\Aiino" or~,. :-= rwl~tlon of itt cont~ts In ~1 ~anner to ~n unawthora:e ~r~Oft '' ~ro iteo b1 l~w. It ~ may not be r'eproduced In whole or in part by other than Uru ted Sbtta Air force Ol~t"cies, .--- except by peralis,ion of the Di recto~et:Xs~r~r~:l~S,F. ~- (Chlllflcatlon) AF F~RH !!2---PART !1. APPROVED ~ June I 9'48 f~\_!gr!'., 13Jrd Frw ?aul !:in~esot.a l3NCLAS51FlEO (Classification AIR ltcTELLIGEMCE INFORMATION REPORT Report tio. (1) At 2150Z o~ 12 Decenb~r 1951, C~pt. Donald K. Slayton, observed ~1 de~tified object five (5) miles southeast of Hastings, ~tlnnesota. Capt. Slayton ~as cru"!.sin.; :lt 10 and had just. pulled out of a loop a:1d . \las h eading back towards ~;old-Chamberlain Airfi9ld, when he first spotted a 'tmite object about one (1) f:1.ile out. and l,OOC! below his left 'dng tip (2) wnen the object \'laS first spotted it appeared to r ese:J.bl3 a kite, but the pilot asourned a ldte \'IOuld not normally be at this altituclt3. (hen the second observation wa.s made, th'! object '~s almost even with and below the left :.r...ng tip and resembled a rou .. '"ld white ob j ect. The r ate o f closure seemed except.io:1all:r fast, but at t his position t h e pilot cssurned t h e object ;ra s a vreather \lind balloon ridinci down-wind. It appeared per f e ctly round, 1 8 to 2 ' in dia'ileter, whi t e o r silver. The object gave an illusion of spiP~1ing, which at this stage . was attributed by Capt. Sl~j~n, t o li~t diffusion. r;u'tlbers -A/C Roma.."l Nl=.'ler~ls -Object. (3) At noir.t 1lo (1), ~ilot. first obs~rv.ad object., ha !'.1<J.d e a left 18o0 ~'~ cl'=!'i ouJ .. ct. 0a to tarn to t left d se~1ed to ~ain 3peed ra9id~v. T~e ?~O~ ~tri.th the object at '3.l:>ot:t a 300 le.:'t ban~.:. It ~ras ,-:J..t r~hi:3 roi.."l':. t .'le p l..!.Ot. .._ ... ,:1-re the obj ~ct ~-ra.s !;0t flo'1.:.:..nz in space, but ro.ther h :ld acc~l:r'lt.i.~ ~OTE: ints docu~ent eo~tai~t Information affecting the national defense of the Ue6t., Stat tala ~ me!~ing of the Enlonage Act, SO U.S.C.---31 and 32, u a ended. Jh tr.,. .. ltttM o, ne ' l1. on of Its eontenh I:'\ any "ftanner to an una11tnorlzed peraott i l)rOftibltM ~ 1-. I t r t be rttpreduced in whole or in o~r-:. b1 o~ntr than Unltect State Air Force ttftoi .. , .. , ,, ,.,.. : ss I on o f t h 0 I recto r o f I :'\ t 1 I I g.,. ce. U SA F. ~ Intell., lJ3rd FIW }!inneaota ~Ct:ASSIFlE.D .. -: .:' -=.:.~ rate, and took;. 'on. the appearance or a single object, ~d then gained speed very .. ~ .,. rapidly leaving point (II). and approaching point (III). Rotational. effect ap- . :.r . paared to be 1n, a counter-clockwise direct,ion at..all times. . (6) ' Pil.:>t when.approach~ng point (4) started tot ur.1 1dth object 3.t. about a ~ 2700 left tum,.the:object picking upspeed at all times. At poi:1t (4) -(III) . . the pilot had. an' est:i.matad sp eed of about 280 oph. Jhe pilot ass~.Jm.es the spe~d of the objec_t at: .. this poL1.t ;-.ra.s about 380 o r 400 mph. . . . : . (7) The pilot started t o stra:.ghten out t hen snap back into position , . . ... ::~When pilot went. b~ck into turn he lost sight of object t point (IV). at-point (5) . APPaOVElJ: Colonel, USAF' . ,, ; Win3 E.xectlt i ve Officer . G~"'.l1AHD P. KAS~:E' Na.~or, USA..t4' I ntelligence Officer ~CT rn:>:.t STATUD REPORT ,11_ .... 2.._ Til:E (Local): 21 ~o~ LOCA'i'IO~: : stir13s, l iinn. l-ENGTH OF 'll I:E OBSERVED a 3-4 Hin. SP,C;W: 380-t..OO mph ALTITUDE: 9 , ()()()I SOURCE: lS!i.F Pilot ACTION Oa COHirtliTS: Pendin3 DESCRIPTimr OF IrlctDENT: ~r.,ite objec t r e s6;*,bli n: ; a k i t e o.oout 1000 ft. beloir e./ c