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

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Total Less Unknown
Unknown
Per Cent
Per Cent
50 45 40 35 30 25 20 15
10
5
0
0
5
10
15 20 25 30 35 40 45 50
Elliptical
Rocket
and
aircraft
Meteor or
comet
Lenticular,
conicol or
c,,
U
a,
teardrop
Flame
Other shop,
Not stated
FIGURE 22 COMPARISON OF KNOWN AND UNKNOWN OBJECT SIGHTINGS BY SHAPE, 1947-1952
A•7500