UFO Sightings
1,599 UFO sighting reports with location, shape, and duration fields. Good for geographic concentration analysis, seasonal patterns, and shape-cluster visualisations.
Challenge brief
slug: 2021-02-ufo-sightings title: UFO Sightings year: 2021 month: 02 source: authored authored_at: 2026-04-19 needs_leon_review: true
UFO Sightings - Challenge Brief
Challenge period: February 2021 Dataset: Reconstructed brief based on the shipped data file for the February 2021 DataDNA challenge.
About the data
The primary data table for this challenge carries the following columns:
fixed acidityvolatile aciditycitric acidresidual sugarchloridesfree sulfur dioxidetotal sulfur dioxidedensitypHsulphatesalcoholquality
Suggested analytical angles
- Where and when are sightings most concentrated?
- How have sighting reports evolved year over year?
- Do shape or duration distributions cluster geographically?
- Are there seasonal or nightly rhythms to reported sightings?
What great submissions did
This brief was reconstructed from the dataset contents in 2026 as part of the Playground audit. The original February 2021 challenge brief was not preserved as a separate file in the source archive, so the analytical angles above are inferred from the column list. See the corresponding /challenges/ entry on datadna.onyxdata.co.uk for examples of how participants approached the data.
Editorial note
_This stub was authored by Claude on 2026-04-19 for Leon's review. Refine the suggested angles and confirm factual accuracy before setting brief_status = leon_reviewed in the audit log._
This dataset was the subject of the DataDNA February 2021 community challenge. The original scoring and leaderboard pre-date the current submission system and are not available for display.
