The RB-47 radar/visual incident occurred during a flight over Mississippi, Louisiana, Texas, and Oklahoma, South Central United States during the early hours of the morning on 17 July 1957.
This incident is Case 63 in Isaac Koi's "Top 100" article, since it was referred to in 45 of the books covered by that article.
This was Project Blue Book Case Number 4810.
This incident featured as the top incident in a documentary produced by Paul Kimball entitled “Best Evidence: Top 10 UFO Cases”, purportedly based on the results of a survey conducted by Paul Kimball in 2005/2006 of “a select group of the world’s leading UFO researchers”.
As part of a survey by the Fortean Times in 2007 of various researchers of the ten cases from 1947 onwards that interested them the most, ufologist Jerome Clark indicated he considered this incident to be “the most evidential”.
This incident has also featured in lists by various UFO researchers of the top UFO cases, including the following:
a list by Paul Kimball of his own nominations for the top 10 cases.