PROJECT 10073 RECORD CARD 1. DATE 11 December 1957 2. LOCATION Lake City AFS, Tennessee 12. CONCLUSIONS XX Was Balloon □ Probably Balloon □ Possibly Balloon 3. DATE-TIME GROUP Local _______________ GMT 12/0048Z 4. TYPE OF OBSERVATION □ Ground-Visual XX Ground-Radar □ Air-Visual □ Air-Intercept Radar □ Was Aircraft □ Probably Aircraft □ Possibly Aircraft 5. PHOTOS □ Yes XX No 6. SOURCE Military □ Was Astronomical □ Probably Astronomical □ Possibly Astronomical 7. LENGTH OF OBSERVATION 41 minutes 8. NUMBER OF OBJECTS one 9. COURSE SE □ Other_______________ □ Insufficient Data for Evaluation □ Unknown 10. BRIEF SUMMARY OF SIGHTING Object about the size of 3 B-47 a/c in close formation. Object descending from an altitude of 13,000 ft to 11,000 ft at point of fade. Speed estimated 90 knots. Winds from NW to NNW 30-50 knots. 11. COMMENTS Inconsistant information, radar range of rptd target is not given. Object speed indicated at 90 kts yet object in sight for 41 minutes. Object at this speed would move out of range. Winds at 30 kts likely balloon as target paint. Obj moving in direction of wind. ATIC FORM 329 (REV 26 SEP 52)