Identification studies of UFOs
Breakdown of cases
Hendry also used a case classification system developed by his mentor J. Allen Hynek, who established CUFOS, where the study was carried out.

Identification studies of UFOs

Section Title: Breakdown of cases
Table Section Text: Hendry also used a case classification system developed by his mentor J. Allen Hynek, who established CUFOS, where the study was carried out.

Category	NL	DD	CE	RV	Total Cases	Percent

Astronomical

bright stars or planets	360	2	16	2	380	29%

meteors, re-entering man-made spacecraft	113	5	4	0	122	9%

artificial satellites	24	0	0	0	24	2%

moon	22	0	0	0	22	2%

TOTAL (all cases)	519	7	22	2	550	42%

Aircraft

advertising planes	230	0	22	0	252	19%

other aircraft	196	22	6	0	224	17%

missile launches	9	0	1	0	10	0.7%

TOTAL	435	22	29	0	486	37%

balloons	23	35	2	3	63	5%

birds	5	1	0	0	6	0.5%

clouds, dust	10	2	0	0	12	0.9%

light phenomena (mirage, moon dog, ground lights, searchlights, etc.)	9	1	4	0	14	1.1%

other (kites, flares, reflections, windblown debris, etc.)	12	3	1	0	16	1.2%

Total Identified

Cases	1024	71	58	5	1158	88.6%

Percent	78.3%	5.4%	4.4%	.4%	88.6%

Total Unidentified

Cases	79	18	16	0	113	8.6%

Percent	6%	1.4%	1.2%	0%	8.6%

MISC (insufficient information, inconsistent accounts, unreliable witnesses)	36	2.8%

Total all cases

Cases	1103	89	74	5	1307	100%

Percent	84.4%	6.8%	5.7%	0.4%	100%

Sentence(s)

Out of 1,307 cases Hendry deemed 88.6% and 8.6% were unknowns (UFOs).

final_sentence: Out of 1,307 cases Hendry deemed 88.6% and 8.6% were unknowns (UFOs).