15 mi SW Lead, South DakotaJune 1960

Insufficient Data

Summary

On June 24, 1960, a military observer reported sighting an object 15 miles southwest of Lead, South Dakota. The object was described as oblong and colored variable red, green, orange, and white. It was observed at 45 degrees overhead and displayed very brilliant flashes. The object moved straight down over the horizon and took 30 minutes to disappear. The observation lasted 30 minutes total. Only one object was sighted. The source was military. The Air Force noted that the motion must have been very slow to take 30 minutes to descend. They suggested it was probably an astronomical object viewed under atmospheric conditions to give flushes. However, because the position of the object was not included in the report, no identification could be made. The evaluation was listed as unknown.

Reported location

15 mi SW Lead, South Dakota

Date of incident

June 1960

State / country

SD / US

Page count

3 scanned pages

USAF evaluation

unknown

Microfilm

T1206, Roll 38

Original case file scans

Original case file · scanned by NARAPage 1 of 3

View transcribed text

MILITARY PROJECT 10073 RECORD CARD

1. DATE: 24 June, 1960

2. LOCATION: 15 mi SW Lead, South Dakota

12. CONCLUSIONS:
Unknown
Probably Balloon
Possibly Balloon
Was Aircraft
Probably Aircraft
Possibly Aircraft
Was Astronomical
Probably Astronomical
Possibly Astronomical
Other
Insufficient Data for Evaluation
Unknown

3. DATE-TIME GROUP: Local, GMT 24/0955Z

4. TYPE OF OBSERVATION:
Ground-Visual, Ground-Radar, Air-Visual, Air-Intercept Radar

5. PHOTOS: Yes, No

6. SOURCE: Military

7. LENGTH OF OBSERVATION: 30 Minutes

8. NUMBER OF OBJECTS: One

9. COURSE: Unknown

10. BRIEF SUMMARY OF SIGHTING:
Object oblong 2 1/2 times as long as width observed at 45 deg overhead and disappeared over the horizon. Object was colored variable red, green, orange and white. Flashed with brilliance. Took 30 minutes to disappear.

11. COMMENTS:
Motion must have been very slow to take 30 minutes to descend. Probably an astronomical object viewed under atmospheric conditions to give flushes, however position (both elevation and azimuth) of object was not included in the report therefore no identification of the object can be made. Case listed as insufficient Data.

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Source: National Archives Catalog · NAID 28987334