Ellsworth AFB, South DakotaSeptember 1958

Insufficient Data

Summary

On September 28, 1958, two Air Force lieutenants at Ellsworth Air Force Base, South Dakota, reported an unidentified flying object at 0305Z (night). The witnesses, Lt. Dwyer and Lt. Roggenbuck, described an object the shape of a star, pinpoint in size, flashing red, white, and green. They noticed it because of its flashing and brightness. It was not moving and sat about 30 degrees off the horizon, and it was still visible at the time of the report. No sound was heard, and it was seen with the naked eye.

Sky conditions were clear. The Air Force found the star Arcturus was at about 40 degrees elevation and noted no other first-magnitude planets or stars were at or near that position. The Air Force conclusion on the Project 10073 record card was astronomical, evaluated as probably Arcturus. Project 10073 was the Air Force's official record for unidentified flying object reports.

Reported location

Ellsworth AFB, South Dakota

Date of incident

September 1958

State / country

SD / US

Page count

2 scanned pages

USAF evaluation

unknown

Microfilm

T1206, Roll 33

Original case file scans

Original case file · scanned by NARAPage 1 of 2

View transcribed text

| E - - - " . ——— . Risa " A . 174 SEARS i— PO
°
; | {+ - PROJECT 10073 RECORD CARD |
; \. Date 2. LOCATION 12. CUNCLUSIONS
| i 0 Wes Belloon
: ~ - : . " . *0) 0 Probably Balloon
| 3 3. DATE-TIME GROUP 4 TYPE OF OBSERVATION O Possibly Balloon
ele | mGrewnéViewd O Ground-Rodor 8 Srobety Ravereh
: b | __ur_002Z0000% 0 Air Visual O Air-Intercopt Rader |O Possibly Aircraft
] { | 8 PP WW Was Astronomical Ail" 1.0, ©
} , Q Yes DO Probably Astronomical |
i t fa Mo Military O Possibly Astronomical
2 i 7. LENGTH OF.OBSERVATION 8. NUMBER OF OBJECTS | 9. COURSE I TI ins cns |
] 9 sti:l visible after : i Date for Evaluation
1 i a. 1s one stationary
8 © 10. BKEF SUMMARY OF SIGHTING 1). COMMENTS
| 3
2 i obj shape of star, pin point in size, |Star Arcturus at uOdgr clov © Cif
% ,  .‘la~ning red, white & green, Noticed azimuth, No other plancis oo Sun
‘ rec:use of flashing & brightness, Very|of lst mag at or near this »..v,
i § ign, 30dgr off horizon, Indications joint to astiroroi. ong
g sighting, Case cvoluated os
: probably Arcturus. _
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Source: National Archives Catalog · NAID 28979793