July 22, 2026
Asteroid app? More like impact app
Neo Radar: A browser-based orbital mechanics engine with 41k real asteroids
Teen builds asteroid tracker, internet instantly asks if it broke from too much love
TLDR: NEO Radar is a new browser-based map that tracks more than 41,000 real asteroids near Earth, built by a 17-year-old developer using real space-agency data. The community’s main reaction was equal parts amazement and chaos, with people joking the site was already collapsing under too much attention.
A 17-year-old developer from Brazil dropped NEO Radar, a browser tool that shows 41,859 real asteroids and simulates how they move near Earth, and the community reaction was basically: “wait, a teenager made this?” The project pitches itself as the serious version of a space viewer, using real NASA and JPL data to track objects passing near our planet. Translation for non-space nerds: it’s a live map of rocks flying around space, including some that get uncomfortably close.
But the real popcorn moment came in the comments. Instead of instantly nitpicking the math, one of the first big reactions was the classic internet badge of honor: the site seemed to get hugged to death. One commenter immediately asked how on Earth the app was loading 41,000-plus points of data in a browser, which neatly captures the mood: half impressed, half suspicious, and fully ready to stress-test the thing into orbit. The strongest opinion so far is that the project is wildly ambitious for any solo developer, let alone a teenager, and that alone made people stop scrolling.
There’s also a subtle undercurrent of delightful nerd drama: is this “just a cool space toy,” or shockingly legit engineering dressed up for the web? The creator clearly wants the second label, boasting mission-planner-level accuracy and real physics, and commenters seem torn between awe and immediate performance panic. In other words, the community served the perfect tech-comment combo meal: respect, disbelief, and jokes about accidentally DDoSing a space app.
Key Points
- •NEO Radar says it tracks 41,859 objects, including 47 high-fidelity near-Earth objects with full RK4 N-body dynamics and 41,812 MPC catalog asteroids with real positions.
- •The article states that 139 asteroids are passing through Earth’s neighborhood this month and shows live close-approach data updated from NASA NeoWs.
- •The system says it integrates trajectories from JPL Horizons ephemeris and includes gravitational perturbations from outer planets across simulations of all eight planets.
- •Its engineering description highlights direct solution of Kepler’s equation using Newton-Raphson and N-body RK4 integration with adaptive time steps.
- •NEO Radar reports a 50-year benchmark RMS position error of 412 km versus 18,400 km for a Kepler-only model and 112,000 km for a two-body simulation.