The Holloman UFO seen through theodolite in 1950 very much resembles one of the two objects seen at Everest during the 1933 ascent, as well as an object seen in other cases in Australia. I think it could be the same object:
Hollomon object, 1950:
"Through the finders on the theodolite the object presented a side view to the observers and appeared to be cigar-shaped and metallic,
with a straw-colored irridescent radiance or luster.
Fins one-third of the way back from the front of the fuselage with a row of as least three oblong ports extending from the fins to the rear of the object and located above the center line of the fuselage complete the physical description. The ports were dark, somewhat a "smoky" gray but not luminescent. The object hovered in an almost horizontal position, elevation 20-25 degrees, azimuth northeast. Shortly after the men had focused their theodolite on the object, it began maneuvering."
Everest object, 1933:
I saw two curious looking objects floating in the sky.
They strongly represented kite-balloons inshape,
but one possessed what appeared to be squat undeveloped wings .and the other a protuberance suggestive of a beak.
Fix this
'NOT AN OPTICAL ILLUSION'
'They hovered motionless, but
seemed to pulsate, a pulsation inci
deritly much slower than my own
heart-beats, which is of interest sup
posing that it was no optical illusion.
The two objects were very dark in
colour, and were silhoutted sharply
Fix this textagainst the sky, or possibly a back
ground of cloud
GHOST OF EVEREST - CLIMBERS' CURIOUS TALES. STRANGE OBJECTS OBSERVED. EXPERIENCE IN SCOTLAND. - The Gloucester Advocate (NSW : 1905 - 1954) - 20 Nov 1934"in%20the%20s