When was the astronomer whose classification of close encounters with aliens was used to derive the title to "The Fourth Kind" born?
The Fourth Kind:  The title is derived from the expansion of J. Allen Hynek's classification of close encounters with aliens, in which the fourth kind denotes alien abductions. J. Allen Hynek: Dr. Josef Allen Hynek (May 1, 1910 – April 27, 1986) was an American astronomer, professor, and ufologist.
May 1, 1910