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Case FileNARA NAID 28979772 · T1206 Roll 33

Project Blue Book Case File

29 Mi W Of Crosby, N. D., September 1958September 1958

Insufficient Data

Summary

On September 7, 1958, at 7:03 a.m., a circular object about the size of a dime was sighted 29 miles west of Crosby, North Dakota. The object flashed red, green, and violet colors. It moved to the west, then gained altitude as the sun rose until it disappeared. The sighting lasted 1 hour and 30 minutes. An Intercept Controller from the 789th Air Defense Squadron noted the object appeared in the exact position of the planet Mars at the time given. The cool weather and high altitude would tend to make Mars appear to flash and change color. The Air Force concluded no possible explanation was found.

Reported location

29 Mi W Of Crosby, N. D., September 1958

Date of incident

September 1958

State / country

? / XX

Page count

3 scanned pages

USAF evaluation

unknown

Microfilm

T1206, Roll 33

Original case file scans

Original case file · scanned by NARAPage 1 of 3
View transcribed text
PROJECT 10073 RECORD CARD

1. DATE
7 September 1958

2. LOCATION
29 Mi W of Crosby, N.D.

3. DATE-TIME GROUP
Leed______
GMT___07/1033Z

PROTO
□ Yes
☑ No

3A. TIME GROUP

7. LENGTH OF OBSERVATION
1 hr 30 mins

4. TYPE OF OBSERVATION
☑Ground-Visual     □ Ground-Radar
□ Air-Visual        □ Air-Intercept Radar

5. SOURCE
Military

8. NUMBER OF OBJECTS
one

9. COURSE
West

13. CONCLUSIONS
□ Was Balloon
□ Probably Balloon
□ Possibly Balloon

□ Was Aircraft
□ Probably Aircraft
□ Possibly Aircraft

□ Was Astronomical
□ Probably Astronomical
☑ Possibly Astronomical

□ Other
□ Insufficient Data for Evaluation
□ Unknown

10. BRIEF SUMMARY OF SIGHTING
Circular obj, size of dime, flashing red, green & violet, seemed to move to the West, then as the sun rose it gained altitude until it disappeared.

11. COMMENTS
Astro plot & tables indicates planet Mars in the exact position at time given. The cool weather would tend to make it appear to flash & change color.

[Bottom portion contains routing stamps and handwritten marks]
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Source: National Archives Catalog · NAID 28979772