Petersburg, IL, USA
Black, triangular UFO over a small central Illinois town.
Report quality: Moderate66/100
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: 10s, a plausible sighting length
- Brief witness text (57 characters)
- Location geocoded exactly
- 2 other reports from the same city within 3 days
- When
- 2009-11-28
- Where
- Petersburg, IL, USA
- Shape
- Triangle
- Duration
- 10 seconds
- Geo
- 40.012, -89.848 · exact
- Slug
- triangle-over-petersburg-il-2009-9ef843
Part of a wave
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…
Local cluster
3 reports came out of Petersburg, IL in November 2009 alone — a local cluster.
In context
- Petersburg, IL has 3 sightings on file here.
- 2009 brought 140 reports from Illinois.
- The 2000s skewed 10.1% triangle reports; the archive-wide figure is 9%.
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.