UFOMYST
CaseTriangle2018

Matteson, IL, USA

I was in my yard and a star proceeded to move approximately 7 inches in the sky, southwest to northeast, revealing a triangular shape e

Report quality: Moderate55/100

This score reflects report-quality signals on file — how complete, corroborated, and precisely located the report is — not a claim about whether the sighting was a real craft.

  • Duration parsed: 180s, a plausible sighting length
  • Detailed witness text (135 characters)
  • Location geocoded exactly
  • No other reports from this city within 3 days
When
2018-05-05
Where
Matteson, IL, USA
Shape
Triangle
Duration
3 minutes
Geo
41.504, -87.713 · exact
Slug
triangle-over-matteson-il-2018-831ddb
Wave

Part of a wave

  • Historical wave2004

    The Navy Encounters & the UAP Era

    U.S. training ranges (Pacific off San Diego; Atlantic off Virginia), then worldwide reporting

    The wave that renamed the subject. The USS Nimitz 'Tic Tac' encounter (November 2004: radar drops from 80,000 ft to sea level in seconds, pilot visual by Cmdr. David Fravor, FLIR video) stayed classified-adjacent until…

    Open wave →

In context

  • Matteson, IL has 12 sightings on file here.
  • 2018 brought 104 reports from Illinois.
  • The 2010s skewed 8.4% triangle reports; the archive-wide figure is 9%.

Nearby in space & time

within 30 days

Report

Full narrative lands with dossier import for famous cases, or the NUFORC free-text summary above for standard reports. This shell is SSR-ready: one D1 row (including connections_json) per page.