Asteroid Close Approach vs AsteroTrack

Stay informed about the most recent near-Earth asteroid encounters—right from your iPhone or on your Apple Watch. Easily check the upcoming dates and times of close approaches, along with their distances, velocities, magnitudes, and estimated impact energies in kilotons. Dive into NASA’s Sentry database, a powerful collision monitoring system that continuously scans the latest asteroid catalog for any potential impacts within the next 100 years. Curious about an asteroid’s mass and energy? Use the built-in calculator to estimate these figures based on its absolute magnitude and approach speed. Features: • Latest Encounters on Your Wrist: View real-time asteroid data at a glance on your Apple Watch. • Comprehensive Tracking: Check each asteroid’s approach date, distance, velocity, magnitude, and potential impact energy. • Sentry Database Access: Keep tabs on NASA’s up-to-date collision predictions for the next century. • Asteroid Mass & Energy Calculator: Estimate physical properties and potential impact energy with a simple input of magnitude and speed. Stay informed, prepared, and captivated by the wonders of our cosmic neighborhood—anytime, anywhere.

AsteroTrack lets you explore near-Earth asteroids using data provided by the NASA NEO API. Check upcoming approaches, discover the most relevant objects of the week, and better understand each asteroid through clear visualizations of distance, size, speed, and risk level. Key features: • Summary of near-Earth asteroids for today and the coming days. • Official NASA data including distance, diameter, speed, magnitude, and approach date. • Visual approach diagram relative to Earth and the Moon. • Size comparison with familiar real-world references. • Advanced filters by hazard status, distance, size, and speed. • Search by date, name, ID, and custom date ranges. • Favorites with personal notes. • Official NASA/JPL links when available. • Configurable alerts for relevant approaches. • Unit options and language selection between system, Spanish, and English. • Recent data caching for previously loaded information. AsteroTrack is designed for curious users, students, astronomy enthusiasts, and anyone who wants an easy way to follow near-Earth objects. Data is retrieved from public NASA/JPL sources. Risk classifications are informational and do not replace official communications from space agencies.