Project Blue Book Special Report No. 14 (Analysis of Reports of Unidentified Aerial Objects)

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TABLE A107 EVALUATION OF ALL SIGHTINGS FOR ALL YEARS BY DURATION OF SIGHTING FOR MONTHS OF YEAR, SIX TO THIRTY MINUTES

Evaluation | JANUARY | FEBRUARY | MARCH | APRIL
Number | Per Cent | Number | Per Cent | Number | Per Cent | Number | Per Cent
Certain | Doubtful | Total | Certain | Doubtful | Total | Certain | Doubtful | Total | Certain | Doubtful | Total | Certain | Doubtful | Total | Certain | Doubtful | Total | Certain | Doubtful | Total | Certain | Doubtful | Total
0-Balloon | 1 | 1 | 2 | 5.9 | 5.9 | 11.8 | 3 | 0 | 3 | 25.0 | 0.0 | 25.0 | 2 | 3 | 5 | 13.3 | 20.0 | 33.3 | 0 | 0 | 0 | 0.0 | 0.0 | 0.0
1-Astronomical | 6 | 0 | 6 | 35.3 | 0.0 | 35.3 | 2 | 0 | 2 | 16.7 | 0.0 | 16.7 | 1 | 0 | 1 | 6.7 | 0.0 | 6.7 | 4 | 1 | 5 | 25.0 | 6.3 | 31.3
2-Aircraft | 2 | 1 | 3 | 11.8 | 5.9 | 17.7 | 0 | 2 | 2 | 0.0 | 16.7 | 16.7 | 1 | 2 | 3 | 6.7 | 13.3 | 20.0 | 4 | 0 | 4 | 25.0 | 0.0 | 25.0
3-Light Phenom. | 0 | 0 | 0 | 0.0 | 0.0 | 0.0 | 0 | 0 | 0 | 0.0 | 0.0 | 0.0 | 0 | 0 | 0 | 0.0 | 0.0 | 0.0 | 0 | 0 | 0 | 0.0 | 0.0 | 0.0
4-Birds | 0 | 0 | 0 | 0.0 | 0.0 | 0.0 | 0 | 0 | 0 | 0.0 | 0.0 | 0.0 | 0 | 0 | 0 | 0.0 | 0.0 | 0.0 | 0 | 0 | 0 | 0.0 | 0.0 | 0.0
5-Clouds, Dust, etc. | 0 | 0 | 0 | 0.0 | 0.0 | 0.0 | 0 | 0 | 0 | 0.0 | 0.0 | 0.0 | 0 | 0 | 0 | 0.0 | 0.0 | 0.0 | 0 | 0 | 0 | 0.0 | 0.0 | 0.0
6-Insuffic. Info. | 0 | 0 | 0 | 0.0 | 0.0 | 0.0 | 0 | 0 | 0 | 0.0 | 0.0 | 0.0 | 0 | 0 | 0 | 0.0 | 0.0 | 0.0 | 1 | 0 | 1 | 6.3 | 0.0 | 6.3
7-Psychological | 1 | 0 | 1 | 5.9 | 0.0 | 5.9 | 0 | 0 | 0 | 0.0 | 0.0 | 0.0 | 0 | 0 | 0 | 0.0 | 0.0 | 0.0 | 0 | 0 | 0 | 0.0 | 0.0 | 0.0
8-Unknown | 4 | 0 | 4 | 23.5 | 0.0 | 23.5 | 2 | 0 | 2 | 16.7 | 0.0 | 16.7 | 5 | 0 | 5 | 33.3 | 0.0 | 33.3 | 6 | 0 | 6 | 37.5 | 0.0 | 37.5
9-Other | 1 | 0 | 1 | 5.9 | 0.0 | 5.9 | 3 | 0 | 3 | 25.0 | 0.0 | 25.0 | 0 | 1 | 1 | 0.0 | 6.7 | 6.7 | 0 | 0 | 0 | 0.0 | 0.0 | 0.0
Total | 15 | 2 | 17 | 88.2 | 11.8 | 100. | 10 | 2 | 12 | 83.3 | 16.7 | 100. | 9 | 6 | 15 | 60.0 | 40.0 | 100. | 15 | 1 | 16 | 93.7 | 6.3 | 100.

Evaluation | MAY | JUNE | JULY | AUGUST
Number | Per Cent | Number | Per Cent | Number | Per Cent | Number | Per Cent
Certain | Doubtful | Total | Certain | Doubtful | Total | Certain | Doubtful | Total | Certain | Doubtful | Total | Certain | Doubtful | Total | Certain | Doubtful | Total | Certain | Doubtful | Total | Certain | Doubtful | Total
0-Balloon | 9 | 2 | 11 | 26.5 | 5.9 | 32.4 | 13 | 3 | 16 | 30.2 | 7.0 | 37.2 | 24 | 14 | 38 | 19.6 | 11.5 | 31.1 | 17 | 13 | 30 | 18.3 | 14.0 | 32.3
1-Astronomical | 3 | 1 | 4 | 8.8 | 2.9 | 11.7 | 2 | 0 | 2 | 4.7 | 0.0 | 4.7 | 7 | 4 | 11 | 5.7 | 3.3 | 9.0 | 8 | 2 | 10 | 8.6 | 2.2 | 10.8
2-Aircraft | 5 | 2 | 7 | 14.7 | 5.9 | 20.6 | 5 | 3 | 8 | 11.6 | 7.0 | 18.6 | 16 | 8 | 24 | 13.1 | 6.6 | 19.7 | 6 | 17 | 23 | 6.4 | 18.3 | 24.7
3-Light Phenom. | 3 | 0 | 3 | 8.8 | 0.0 | 8.8 | 1 | 0 | 1 | 2.3 | 0.0 | 2.3 | 3 | 2 | 5 | 2.5 | 1.6 | 4.1 | 4 | 0 | 4 | 4.3 | 0.0 | 4.3
4-Birds | 0 | 0 | 0 | 0.0 | 0.0 | 0.0 | 0 | 0 | 0 | 0.0 | 0.0 | 0.0 | 0 | 0 | 0 | 0.0 | 0.0 | 0.0 | 0 | 0 | 0 | 0.0 | 0.0 | 0.0
5-Clouds, Dust, etc. | 1 | 0 | 1 | 2.9 | 0.0 | 2.9 | 0 | 0 | 0 | 0.0 | 0.0 | 0.0 | 0 | 0 | 0 | 0.0 | 0.0 | 0.0 | 0 | 1 | 1 | 0.0 | 1.1 | 1.1
6-Insuffic. Info. | 3 | 0 | 3 | 8.8 | 0.0 | 8.8 | 3 | 0 | 3 | 7.0 | 0.0 | 7.0 | 16 | 0 | 16 | 13.1 | 0.0 | 13.1 | 6 | 0 | 6 | 6.4 | 0.0 | 6.4
7-Psychological | 0 | 0 | 0 | 0.0 | 0.0 | 0.0 | 4 | 0 | 4 | 9.3 | 0.0 | 9.3 | 1 | 0 | 1 | 0.8 | 0.0 | 0.8 | 2 | 0 | 2 | 2.2 | 0.0 | 2.2
8-Unknown | 2 | 0 | 2 | 5.9 | 0.0 | 5.9 | 9 | 0 | 9 | 20.9 | 0.0 | 20.9 | 22 | 0 | 22 | 18.0 | 0.0 | 18.0 | 12 | 0 | 12 | 12.9 | 0.0 | 12.9
9-Other | 1 | 2 | 3 | 2.9 | 5.9 | 8.8 | 0 | 0 | 0 | 0.0 | 0.0 | 0.0 | 4 | 1 | 5 | 3.3 | 0.8 | 4.1 | 4 | 1 | 5 | 4.3 | 1.1 | 5.4
Total | 27 | 7 | 34 | 79.4 | 20.6 | 100. | 37 | 6 | 43 | 84.1 | 13.9 | 100. | 93 | 29 | 122 | 76.3 | 23.7 | 100. | 69 | 34 | 93 | 63.4 | 36.6 | 100.

Evaluation | SEPTEMBER | OCTOBER | NOVEMBER | DECEMBER
Number | Per Cent | Number | Per Cent | Number | Per Cent | Number | Per Cent
Certain | Doubtful | Total | Certain | Doubtful | Total | Certain | Doubtful | Total | Certain | Doubtful | Total | Certain | Doubtful | Total | Certain | Doubtful | Total | Certain | Doubtful | Total | Certain | Doubtful | Total
0-Balloon | 3 | 2 | 5 | 10.0 | 6.7 | 16.7 | 2 | 6 | 8 | 9.1 | 27.2 | 36.3 | 2 | 7 | 9 | 6.3 | 21.9 | 28.2 | 2 | 1 | 3 | 8.0 | 4.0 | 12.0
1-Astronomical | 0 | 2 | 2 | 0.0 | 6.7 | 6.7 | 1 | 2 | 3 | 4.5 | 9.1 | 13.6 | 3 | 3 | 6 | 9.4 | 9.4 | 18.8 | 5 | 1 | 6 | 20.0 | 4.0 | 24.0
2-Aircraft | 1 | 8 | 9 | 3.3 | 26.7 | 30.0 | 1 | 2 | 3 | 4.5 | 9.1 | 13.6 | 0 | 8 | 8 | 0.0 | 25.0 | 25.0 | 1 | 2 | 3 | 4.0 | 8.0 | 12.0
3-Light Phenom. | 1 | 1 | 2 | 3.3 | 3.3 | 6.6 | 1 | 2 | 3 | 4.5 | 9.1 | 13.6 | 1 | 1 | 2 | 3.1 | 3.1 | 6.2 | 1 | 0 | 1 | 4.0 | 0.0 | 4.0
4-Birds | 0 | 0 | 0 | 0.0 | 0.0 | 0.0 | 0 | 1 | 1 | 0.0 | 4.5 | 4.5 | 0 | 0 | 0 | 0.0 | 0.0 | 0.0 | 0 | 0 | 0 | 0.0 | 0.0 | 0.0
5-Clouds, Dust, etc. | 0 | 0 | 0 | 0.0 | 0.0 | 0.0 | 0 | 0 | 0 | 0.0 | 0.0 | 0.0 | 0 | 0 | 0 | 0.0 | 0.0 | 0.0 | 0 | 0 | 0 | 0.0 | 0.0 | 0.0
6-Insuffic. Info. | 3 | 0 | 3 | 10.0 | 0.0 | 10.0 | 1 | 0 | 1 | 4.5 | 0.0 | 4.5 | 1 | 0 | 1 | 3.1 | 0.0 | 3.1 | 2 | 0 | 2 | 8.0 | 0.0 | 8.0
7-Psychological | 0 | 0 | 0 | 0.0 | 0.0 | 0.0 | 0 | 0 | 0 | 0.0 | 0.0 | 0.0 | 0 | 0 | 0 | 0.0 | 0.0 | 0.0 | 1 | 0 | 1 | 4.0 | 0.0 | 4.0
8-Unknown | 7 | 0 | 7 | 23.3 | 0.0 | 23.3 | 3 | 0 | 3 | 13.6 | 0.0 | 13.6 | 6 | 0 | 6 | 18.7 | 0.0 | 18.7 | 8 | 0 | 8 | 32.0 | 0.0 | 32.0
9-Other | 1 | 1 | 2 | 3.3 | 3.3 | 6.6 | 0 | 0 | 0 | 0.0 | 0.0 | 0.0 | 0 | 0 | 0 | 0.0 | 0.0 | 0.0 | 1 | 0 | 1 | 4.0 | 0.0 | 4.0
Total | 16 | 14 | 30 | 53.3 | 46.7 | 100. | 9 | 13 | 22 | 40.9 | 59.1 | 100. | 13 | 19 | 32 | 40.6 | 59.4 | 100. | 21 | 4 | 25 | 84.0 | 16.0 | 100.

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