The Astrophyzix Risk Index (ARI): A Heuristic Scoring System for Near-Earth Object Close Approach Visualisation (Version 2) by Astrophyzix Observatory

The Astrophyzix Risk Index (ARI) v2 is a non-official, heuristic 0-100 scoring system developed by Astrophyzix Observatory for educational visualisation of Near-Earth Object (NEO) and PHA close approaches. 

ARI does not estimate impact probability and is not a substitute for the Torino Scale or Palermo Technical Impact Hazard Scale.

Instead, it transforms live data from NASA's Center for Near-Earth Object Studies (CNEOS) into a deterministic, comparative score based on four physically meaningful contributors: miss distance, relative velocity, estimated diameter, and Potentially Hazardous Asteroid (PHA) status.

This system is live and fully auditable by clicking here to access the brandnew version 9 of the Advanced PHA and NEO Tracking and modelling console

Version 2 introduces logarithmic velocity scaling and reduces the PHA bonus from 30 to 18 points to avoid double-counting.

ARI is designed for real-time observatory interfaces, public engagement, and classroom use, providing an intuitive indicator of how dynamically 'noteworthy' an encounter is, while explicitly deferring all hazard assessment to NASA and ESA.

Research notes and views of the system in operation inside the PDF file and live on the Astrophyzix platform. Documentation is available on Astrophyzix.academia.edu/vre