Project Blue Book File on Tremonton Film, Utah, 1952

Text

A machine read this text from the scan. When the text and the image disagree, the image is right.

the type of motion shown by the objects, moving from right to left, or generally from east to west as the camera was situated. This agrees with Figure I, showing the single object reversing course from left to right, or west to east.

10c and d. The relative positions of these objects in the first sequence follow a definite formation plan of either three pairs, a trio, and a single, or perhaps five pairs (if one of the trio and the single are actually a nearby pair). It appears that the objects tend to remain in position for curved path maneuvering. A possible shift in formation appears at the start of the trio paths. Otherwise, the objects definitely appear to undulate in phase in this sequence; as in the other sequences also.

10e and f. Several repeated slow motion viewings of the entire film do not indicate clearly any abrupt changes in flight path of any part of the formation. At times the camera appears to lag in following the entire group, and some of the ten objects then move outside the field of view momentarily. Whether or not a particular object remains motionless for a moment depends upon the relationship of group movement to camera movement.

10g. As explained in Paragraph 10f, sometimes objects may move out of the field of view. In a few instances, however, certain objects may change in brightness considerably, and practically appear or disappear well within the field of view. In the second sequence, which lasts about 14 seconds, the lower two pairs in Figure II flare up suddenly near the center of the field of view, being invisible a moment before. As they flare up, they appear to curve more rapidly to the left and upwards than the center trio. Reversing this sequence in slow motion shows that these four objects were faintly visible just before they disappeared at about the same position.

A tabulation of flight sequences and durations is listed in Appendix III.

CONCLUSIONS

1. Subject motion picture film apparently records the motions of ten unknown aerial objects, all alike in observed characteristics of movement and size.

2. The exact nature of these objects cannot be determined, because they are visible only as small spots of light. It can be deduced, however, that they are either non-spherical in shape and similar to bright metal in reflectance, or else variably self-luminous by some means.

3. There is apparently a coordination of movement to some extent among these objects. They seem to move in formations which are probably three-dimensional in arrangement. The largest angular size of the entire group is on the order of 6 to 8 degrees of arc.

4. The movements of these objects suggest flight paths consisting of skew curves in space. In one instance a single object changed course and followed a nearly straight line path with reasonable uniformity of motion at an angular velocity of about 2.1 degrees. During this straight line flight it remained reasonably uniform in brightness.

3

DECLASSIFIED Authority NND 923007