following jpeg and searchable text file is a document submitted by Jan
Aldrich which is now housed on the NICAP site for security
March 13, 1959; Duluth, Minnesota
On 13 March 1959, at 0020Z, and on 14 March at 0220Z, an unidentified flying object was sighted from the Duluth, Minnesota area. The object was reported to have been observed both visually and on radar by military personnel from both aerial and ground vantage points. The color of the object, as reported by the witnesses, was red, orange, green or white. The shape was reported as tubular or round. Only one object was reported; it having a speed that allowed it to keep pace with the aircraft, and at times appeared to be rushing toward or away from the witnesses. All witnesses agreed that the object remained at a magnetic bearing of approximately 300 degrees and disappeared by fading from sight.
Two of the airborne witnesses were pilots of F-102 interceptors. These pilots attempted an intercept but were never able to close on the object.
The radar targets were reported to have been both sharp and fuzzy contacts. Some operators indicated that the contact was broken by the object suddenly fading and others indicated that the object suddenly rushed away at speeds too fast for aircraft. The radar observers reported that they locked on to the objects for short periods (ten seconds to one minute) several times during the period, and the object was usually at a different location. Radar film from the ground stations was forwarded to the Foreign Technology Division and analyzed as the phenomenon known as "Angels."
The: sighting period, for both the radar and visual sightings, was reported to have lasted 30 minutes. No sightings were reported to have lasted continuously for the entire 30 minute period.
The weather during the period was reported as clear, visibility 15 (miles?) and the temperatures ranged from a high of 35-degrees F to a low of 27-degrees F. Winds were WNW from 10-15 knots.
The visual sightings were due to the misidentification of the planet Venus. The azimuth of the planet at the time of the sighting coincided with that reported for the UPO. Atmospheric refraction of the planet was a contributing factor.