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

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TABLE A140 EVALUATION OF OBJECT SIGHTINGS FOR ALL YEARS
BY SHAPE OF OBJECT
ELLIPTICAL
ALL YEARS
1947
1948
1949
Number
Per Cent
Number
Per Cent
Number
Per Cent
Number
Per Cent
Evaluation
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
113
83
196
10.9
80
18.9
5
0
5
11.9
0.0
11.9
6
8
14
9.5
12.7
22.2
4
/
5
4.8
1.2
6.0
1-Astronomical
115
91
206
11.1
8.8
19.9
3
4
7
7.1
9.5
16.6
11
11
22
17.5
17.5
34.9
8
26
34
9.5
31.0
40.5
2-Aircraft
130
108
238
12.6
10.5
23.1
/
/
2
2.4
2.4
4.8
6
0
6
9.5
0.0
9.5
7
5
12
8.3
6.0
143
3-Light Phenom.
16
14
30
1.5
1.4
2.9
2
0
2
4.8
D.D
4.8
0
3
3
0.0
4.8
4.8
0
0
0
0.0
00
00
4-Birds
7
4
11
0.7
0.4
1.1
0
0
0
0.0
0.0
0.0
0
/
/
0.0
1.6
1.6
2
0
2
2.4
0.0
2.4
5-Clouds, Dust, etc.
I
3
3
0.0
0.3
0.3
0
0
0
D.D
0.0
00
0
0
0
0.0
0.0
0.0
I
0
0
0.0
0.0
0.0
6-Insuffic. Info.
96
0
96
9.3
0.0
9.3
6
0
6
14.3
0.0
14.3
6
0
6
9.5
0.0
95
14
0
14
16.7
0.0
16.7
7-Psychological
14
8
22
1.4
0.8
2.2
2
2
4
4.8
4.8
9.6
/
0
/
1.6
0.0
1.6
2
0
2
2.4
0.0
2.4
8-Unknown
195
0
195
189
0.0
18.9
8
0
8
19.0
0.0
190
7
0
7
11.1
0.0
11.1
12
0
12
143
0.0
14.3
9-Other
30
6
36
2.9
0.6
3.5
8
0
8
19.0
D.O
190
2
/
3
3.2
1.6
4.8
3
0
3
3.6
0.0
3.6
Total
716
317
1033
69.3
30.7
100.
35
7
42
83.3
16.7
100.
39
24
63
61.9
38.1
100.
52
32
84
61.9
38.1
100.
1950
1951
1952
Number
Per Cent
Number
Per Cent
Number
Per Cent
Number
Per Cent
Evaluation
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
10
/
11
14.3
1.4
15.7
3
/
4
10.7
3.6
143
85
72
157
11.4
9.7
21.1
1-Astronomical
9
3
12
12.9
4.3
17.2
3
2
5
10.7
7.1
17.8
81
45
126
10.9
60
16.9
2-Aircraft
8
2
10
11.4
2.9
143
3
0
3
10.7
0.0
10.7
105
100
205
14.1
13.4
27.5
3-Light Phenom.
0
0
0
0.0
0.0
0.0
0
/
/
0.0
36
36
14
10
24
1.9
1.3
3.2
4-Birds
0
0
0
0.0
0.0
0.0
0
/
/
0.0
3.6
36
5
2
7
0.7
0.3
1.0
5-Clouds, Dust, etc.
0
0
0
0.0
0.0
0.0
0
0
0
0.0
0.0
0.0
0
3
3
0.0
0.4
0.4
6-Insuffic. Info.
13
0
13
18.6
0.0
18.6
4
0
4
14.3
0.0
14.3
53
0
53
71
0.0
7.1
7-Psychological
2
0
2
2.9
0.0
2.9
0
/
/
0.0
3.6
36
7
5
12
0.9
0.7
1.6
8-Unknown
19
0
19
27.1
0.0
27.1
9
0
9
32.1
0.0
32.1
140
0
140
18.8
0.0
18.8
9-Other
2
/
3
2.9
1.4
4.3
0
0
0
0.0
0.0
0.0
15
4
19
2.0
0.5
2.5
Total
63
7
70
90.0
10.0
100.
22
6
28
78.6
21.4
100.
505
241
746
67.7
32.3
100.
TABLE A141 EVALUATION OF OBJECT SIGHTINGS FOR ALL YEARS
BY
SHAPE OF OBJECT,
ROCKET AND AIRCRAFT
ALL YEARS
1947
1948
1949
Number
Per Cent
Number
Per Cent
Number
Per Cent
Number
Per Cent
Evaluation
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
/
4
2.7
0.9
3.5
0
0
0
0.0
0.0
0.0
0
0
0
00
0.0
0.0
/
0
/
7.7
0.0
77
1-Astronomical
2
6
8
18
5.3
7.1
0
0
0
0.0
0.0
0.0
0
2
2
0.0
18.2
182
0
/
/
0.0
7.7
77
2-Aircraft
20
20
40
17.7
17.7
35.4
0
0
0
0.0
0.0
0.0
5
/
6
45.5
9.1
54.6
2
/
3
15.4
1.7
23.1
3-Light Phenom.
2
/
3
18
09
2.7
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
0.9
0.9
0
0
0
0.0
0.0
0.0
0
0
0
0.0
O.D
0.0
0
0
0
0.0
0.0
D.O
6-Insuffic. Info.
10
0
10
8.8
0.0
8.8
0
0
0
0.0
0.0
0.0
/
0
/
9.1
0.0
9.1
2
0
2
15.4
0.0
15.4
7-Psychological
7
0
7
6.2
0.0
6.2
0
0
0
0.0
0.0
0.0
0
0
0
00
00
0.0
/
0
/
7.7
0.0
77
8-Unknown
33
0
33
29.2
0.0
29.2
5
0
5
1000
0.0
1000
/
0
/
9.1
0.0
91
5
0
5
38.5
0.0
38.5
9-Other
6
/
7
5.3
0.9
6.2
0
0
0
0.0
0.0
0.0
/
0
/
9.1
0.0
9.1
0
0
0
0.0
0.0
0.0
Total
83
30
113
735
26.5
100.
5
0
5
100.0
0.0
100.
8
3
11
72.7
27.3
100.
//
2
13
84.6
15.4
100
1950
1951
1952
Number
Per Cent
Number
Per Cent
Number
Per Cent
Number
Per Cent
Evaluation
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
/
0
/
12.5
0.0
12.5
0
/
/
0.0
6.3
6.3
/
0
/
1.7
0.0
1.7
1-Astronomical
0
2
2
0.0
25.0
25.0
0
0
a
0.0
0.0
0.0
2
/
3
3.3
1.7
5.0
2-Aircraft
0
0
0
0.0
0.0
0.0
5
3
8
31.3
18.8
50.0
8
15
23
13.3
25.0
38.3
3-Light Phenom.
0
0
0
0.0
0.0
0.0
0
0
0
0.0
0.0
0.0
2
/
3
3.3
1.7
5.0
4-Birds
0
0
0
0.0
D.O
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
1.7
1.7
6-Insuffic. Info.
/
0
/
12.5
0.0
12.5
2
0
2
125
0,0
12.5
4
0
4
6.7
0.0
6.7
7-Psychological
0
0
0
0.0
0.0
0.0
0
0
0
0.0
0.0
0.0
6
0
6
10.0
0.0
10.0
8-Unknown
3
0
3
37.5
0.0
37.5
4
0
4
25.0
0.0
250
15
0
15
25.0
0.0
25.0
9-Other
/
0
/
12.5
0.0
12.5
/
0
/
6.3
0.0
6.3
3
/
4
5.0
1.7
6.7
Total
6
2
8
75.0
25.0
100
12
4
16
750
25.0
100.
41
19
60
68
3
31.7
100.
197