Not listed in the original BB Unknowns,
this incident is listed in
the Comprehensive Catalog of Project Blue Book Unknowns by Brad Sparks.
The incident occurred at 7:30 PM, but there were six other sightings
that day.
Feb. 24, 1950. Datil, New Mexico (34.15° N, 107.85° W).
7:30 p.m. (MST). Stanfield and other Holloman AFB Photographic Branch
project staff for tracking aerial phenomena at the Datil observation
post saw and photographed a circular luminous object 15.31 arcmins
(0.2552°) in diameter with a 3.785° long trail, using 1-5
Cineflex camera with 3-inch focal length lens. (Sparks; FUFOR Index)