# April 17, 1950 — Los Alamos, NM — Metallic Disc Seen Over Los Alamos

**URL:** <https://uapdiscovery.discourse.group/t/april-17-1950-los-alamos-nm-metallic-disc-seen-over-los-alamos/557>\
**Category:** Blue Book Unknowns\
**Created:** [April 16, 2026, 9:54pm UTC](https://uapdiscovery.discourse.group/t/april-17-1950-los-alamos-nm-metallic-disc-seen-over-los-alamos/557 "2026-04-16T21:54:47Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![jeffknox](https://avatars.discourse-cdn.com/v4/letter/j/e47c2d/32.png) [@jeffknox](https://uapdiscovery.discourse.group/u/jeffknox)\
**Post date:** [April 16, 2026, 9:54pm UTC](https://uapdiscovery.discourse.group/t/april-17-1950-los-alamos-nm-metallic-disc-seen-over-los-alamos/557/1 "2026-04-16T21:54:47Z")

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![04171950-LosAlamosNM-NARA-PBB91-475-476](https://canada1.discourse-cdn.com/flex011/uploads/uapdiscovery/original/2X/1/1bbc09f0e9845d90db86c851c15a6e6cd5451eaa.jpeg)

April 17, 1950 — Los Alamos, NM  
More than 15 people report seeing a UFO for 20 minutes at 2,000 feet on the eastern horizon at Los Alamos, New Mexico. One scientist watches the object through a telescope and says it looks flat, circular, metallic, and roughly 9 feet in diameter. It moves faster than any conventional aircraft. [Eberhart]

NARA-PBB91-376-679:

 ![04171950-LosAlamosNM-NARA-PBB91-376](https://canada1.discourse-cdn.com/flex011/uploads/uapdiscovery/original/2X/e/e1804d2ed2248a5d002a949c27d7a3130415fde1.jpeg)

 ![04171950-LosAlamosNM-NARA-PBB91-377](https://canada1.discourse-cdn.com/flex011/uploads/uapdiscovery/original/2X/2/2f08db78f15274137b3a5dc33ea777e4b3409d2b.jpeg)

 ![04171950-LosAlamosNM-NARA-PBB91-378](https://canada1.discourse-cdn.com/flex011/uploads/uapdiscovery/original/2X/6/6cd73adecb7fbf5050f416f410e001ed019614e4.jpeg)

 ![04171950-LosAlamosNM-NARA-PBB91-379](https://canada1.discourse-cdn.com/flex011/uploads/uapdiscovery/original/2X/6/6b3f551eba732e4fba8fdda98643bad9021bb3a3.jpeg)

Sources:  
Loren E. Gross, UFOs, a History: Volume 6, April–July 1950, The Author, 1990, p. 26;

 ![04171950-LosAlamosNM-Gross-p26](https://canada1.discourse-cdn.com/flex011/uploads/uapdiscovery/original/2X/5/549f2bb453bcc0ec3a39052e8cb09bde5a1f4f0a.jpeg)

Brad Sparks, Blue Books Unknowns Catalogue, Case 361, p. 86;

 ![04171950-LosAlamosNM-Sparks-Case361-p86](https://canada1.discourse-cdn.com/flex011/uploads/uapdiscovery/original/2X/6/66f4b4a49751feaef507dd31fe0cc775bfd06830.png)