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

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TABLE A1 EVALUATION OF ALL SIGHTINGS BY MONTH OF YEAR, ALL YEARS

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 | 3 | 3 | 6 | 2.2 | 2.2 | 4.4 | 9 | 0 | 9 | 9.7 | 0.0 | 9.7 | 16 | 4 | 20 | 9.6 | 2.4 | 12.0 | 7 | 3 | 10 | 3.5 | 1.5 | 5.0
1-Astronomical | 29 | 46 | 75 | 21.3 | 33.8 | 55.1 | 17 | 16 | 33 | 18.3 | 17.2 | 35.5 | 21 | 20 | 41 | 12.7 | 12.0 | 24.7 | 52 | 9 | 61 | 26.0 | 4.5 | 30.5
2-Aircraft | 6 | 3 | 9 | 4.4 | 2.2 | 6.6 | 9 | 5 | 14 | 9.7 | 5.4 | 15.1 | 23 | 7 | 30 | 13.9 | 4.2 | 18.1 | 28 | 8 | 36 | 14.0 | 4.0 | 18.0
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 | 1 | 0 | 1 | 0.5 | 0.0 | 0.5
4-Birds | 0 | 0 | 0 | 0.0 | 0.0 | 0.0 | 0 | 0 | 0 | 0.0 | 0.0 | 0.0 | 5 | 0 | 5 | 3.0 | 0.0 | 3.0 | 4 | 1 | 5 | 2.0 | 0.5 | 2.5
5-Clouds, Dust, etc. | 0 | 0 | 0 | 0.0 | 0.0 | 0.0 | 0 | 0 | 0 | 0.0 | 0.0 | 0.0 | 0 | 1 | 1 | 0.0 | 0.6 | 0.6 | 0 | 0 | 0 | 0.0 | 0.0 | 0.0
6-Insuffic. Info. | 8 | 0 | 8 | 5.9 | 0.0 | 5.9 | 13 | 0 | 13 | 14.0 | 0.0 | 14.0 | 22 | 0 | 22 | 13.3 | 0.0 | 13.3 | 26 | 0 | 26 | 13.0 | 0.0 | 13.0
7-Psychological | 2 | 0 | 2 | 1.5 | 0.0 | 1.5 | 0 | 0 | 0 | 0.0 | 0.0 | 0.0 | 0 | 0 | 0 | 0.0 | 0.0 | 0.0 | 2 | 0 | 2 | 1.0 | 0.0 | 1.0
8-Unknown | 26 | 0 | 26 | 19.5 | 0.0 | 19.5 | 16 | 0 | 16 | 17.2 | 0.0 | 17.2 | 29 | 0 | 29 | 17.5 | 0.0 | 17.5 | 57 | 0 | 57 | 28.5 | 0.0 | 28.5
9-Other | 9 | 1 | 10 | 6.6 | 0.7 | 7.3 | 8 | 0 | 8 | 8.6 | 0.0 | 8.6 | 1 | 17 | 18 | 0.6 | 10.2 | 10.8 | 2 | 0 | 2 | 1.0 | 0.0 | 1.0
Total | 83 | 53 | 136 | 61.0 | 39.0 | 100. | 72 | 21 | 93 | 77.4 | 22.6 | 100. | 117 | 49 | 166 | 70.5 | 29.5 | 100. | 179 | 21 | 200 | 89.5 | 10.5 | 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 | 24 | 5 | 29 | 12.4 | 2.6 | 15.0 | 36 | 6 | 42 | 15.8 | 2.6 | 18.4 | 100 | 55 | 155 | 10.8 | 5.9 | 16.7 | 39 | 44 | 83 | 7.5 | 8.4 | 15.9
1-Astronomical | 28 | 10 | 38 | 14.4 | 5.2 | 19.6 | 29 | 23 | 52 | 12.7 | 10.1 | 22.8 | 116 | 55 | 171 | 12.5 | 5.9 | 18.4 | 53 | 70 | 123 | 10.2 | 13.4 | 23.6
2-Aircraft | 25 | 15 | 40 | 12.9 | 7.7 | 20.6 | 30 | 13 | 43 | 13.2 | 5.7 | 18.9 | 133 | 98 | 231 | 14.3 | 10.5 | 24.8 | 52 | 55 | 107 | 10.0 | 10.6 | 20.6
3-Light Phenom. | 3 | 3 | 6 | 1.5 | 1.5 | 3.0 | 1 | 3 | 4 | 0.4 | 1.3 | 1.7 | 14 | 4 | 18 | 1.5 | 0.4 | 1.9 | 7 | 7 | 14 | 1.3 | 1.3 | 2.6
4-Birds | 0 | 2 | 2 | 0.0 | 1.0 | 1.0 | 0 | 0 | 0 | 0.0 | 0.0 | 0.0 | 4 | 3 | 7 | 0.4 | 0.3 | 0.7 | 0 | 0 | 0 | 0.0 | 0.0 | 0.0
5-Clouds, Dust, etc. | 8 | 0 | 8 | 4.1 | 0.0 | 4.1 | 0 | 0 | 0 | 0.0 | 0.0 | 0.0 | 4 | 1 | 5 | 0.4 | 0.1 | 0.5 | 0 | 1 | 1 | 0.0 | 0.2 | 0.2
6-Insuffic. Info. | 22 | 0 | 22 | 11.3 | 0.0 | 11.3 | 25 | 0 | 25 | 11.0 | 0.0 | 11.0 | 98 | 0 | 88 | 9.5 | 0.0 | 9.5 | 45 | 0 | 45 | 8.6 | 0.0 | 8.6
7-Psychological | 0 | 0 | 0 | 0.0 | 0.0 | 0.0 | 6 | 0 | 6 | 2.6 | 0.0 | 2.6 | 9 | 9 | 18 | 1.0 | 1.0 | 2.0 | 10 | 1 | 11 | 1.9 | 0.2 | 2.1
8-Unknown | 36 | 0 | 36 | 18.6 | 0.0 | 18.6 | 47 | 0 | 47 | 20.6 | 0.0 | 20.6 | 195 | 0 | 195 | 21.0 | 0.0 | 21.0 | 119 | 0 | 119 | 22.8 | 0.0 | 22.8
9-Other | 9 | 4 | 13 | 4.6 | 2.1 | 6.7 | 8 | 1 | 9 | 3.5 | 0.4 | 3.9 | 40 | 1 | 41 | 4.3 | 0.1 | 4.4 | 11 | 7 | 18 | 2.1 | 1.3 | 3.4
Total | 155 | 39 | 194 | 79.9 | 20.1 | 100. | 182 | 46 | 228 | 79.8 | 20.2 | 100. | 703 | 226 | 929 | 75.7 | 24.3 | 100. | 336 | 185 | 521 | 64.5 | 35.5 | 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 | 6 | 14 | 20 | 2.9 | 6.7 | 9.6 | 16 | 21 | 37 | 8.3 | 10.9 | 19.2 | 5 | 18 | 23 | 3.0 | 11.0 | 14.0 | 9 | 7 | 16 | 5.4 | 4.2 | 9.6
1-Astronomical | 31 | 11 | 42 | 14.8 | 5.2 | 20.0 | 40 | 21 | 61 | 20.8 | 10.9 | 31.7 | 28 | 29 | 57 | 17.1 | 17.7 | 34.8 | 32 | 31 | 63 | 19.0 | 18.5 | 27.5
2-Aircraft | 14 | 37 | 51 | 6.7 | 17.6 | 24.3 | 11 | 17 | 28 | 5.7 | 8.9 | 14.6 | 11 | 16 | 27 | 6.7 | 9.8 | 16.5 | 12 | 14 | 26 | 7.1 | 8.3 | 15.4
3-Light Phenom. | 1 | 2 | 3 | 0.5 | 1.0 | 1.5 | 1 | 4 | 5 | 0.5 | 2.1 | 2.6 | 3 | 1 | 4 | 1.8 | 0.6 | 2.4 | 1 | 0 | 1 | 0.6 | 0.0 | 0.6
4-Birds | 1 | 2 | 3 | 0.5 | 1.0 | 1.5 | 5 | 2 | 7 | 2.6 | 1.0 | 3.6 | 0 | 0 | 0 | 0.0 | 0.0 | 0.0 | 0 | 0 | 0 | 0.0 | 0.0 | 0.0
5-Clouds, Dust, etc. | 0 | 1 | 1 | 0.0 | 0.5 | 0.5 | 0 | 1 | 1 | 0.0 | 0.5 | 0.5 | 0 | 8 | 8 | 0.0 | 4.9 | 4.9 | 0 | 0 | 0 | 0.0 | 0.0 | 0.0
6-Insuffic. Info. | 20 | 0 | 20 | 9.5 | 0.0 | 9.5 | 12 | 0 | 12 | 6.2 | 0.0 | 6.2 | 8 | 0 | 8 | 4.9 | 0.0 | 4.9 | 9 | 0 | 9 | 5.4 | 0.0 | 5.4
7-Psychological | 3 | 0 | 3 | 1.4 | 0.0 | 1.4 | 1 | 0 | 1 | 0.5 | 0.0 | 0.5 | 1 | 0 | 1 | 0.6 | 0.0 | 0.6 | 4 | 0 | 4 | 2.4 | 0.0 | 2.4
8-Unknown | 56 | 0 | 56 | 26.7 | 0.0 | 26.7 | 36 | 0 | 36 | 18.7 | 0.0 | 18.7 | 32 | 0 | 32 | 19.5 | 0.0 | 19.5 | 40 | 0 | 40 | 23.8 | 0.0 | 23.8
9-Other | 8 | 3 | 11 | 3.8 | 1.4 | 5.2 | 3 | 1 | 4 | 1.6 | 0.5 | 2.1 | 4 | 0 | 4 | 2.4 | 0.0 | 2.4 | 9 | 0 | 9 | 5.4 | 0.0 | 5.4
Total | 140 | 70 | 210 | 66.7 | 33.3 | 100. | 125 | 67 | 192 | 65.1 | 34.9 | 100. | 92 | 72 | 164 | 56.1 | 43.9 | 100. | 116 | 52 | 168 | 69.0 | 31.0 | 100.

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