AstroAlert
AstroAlert is a mobile app that tells you exactly when a satellite, planet, comet, or deep-sky object will pass directly above your location (over 70° altitude).
Cost / License
- Freemium (Subscription)
- Proprietary
EUPlatforms
- iPhone
- iPad
AstroAlert
Features
Tags
- sky-map
- astronomy
AstroAlert News & Activities
Recent activities
- Mobulding added AstroAlert
- POX updated AstroAlert
AstroAlert information
Developed by
Mobulding Licensing
Proprietary and Freemium product.Pricing
Subscription that costs $3 per month + free version with limited functionality.Alternatives
0 alternatives listedSupported Languages
- English
- French
What is AstroAlert?
Unlike most astronomy apps that show hundreds of low-visibility events, AstroAlert focuses only on spectacular, highly visible passes — the ones worth stepping outside for.
? Why AstroAlert stands out Shows only the passes that are actually visible (above 70°) Covers satellites, planets, comets, and deep-sky objects in one place Includes 600+ satellites (visual, active, LEO, Starlink) Uses precise JPL & NASA Horizons ephemerides Daily personalized alerts based on your location (Premium) Includes a full astronomy glossary + NASA Picture of the Day Clean, immersive interface inspired by mission control
🛰? What AstroAlert does Computes the next 24h of sky events for your exact coordinates Highlights “don’t-miss” events (>80°) Shows object name, culmination time, altitude, and type Lets you explore educational sheets for 1,000+ celestial objects (Premium)
📡 Technology Satellite positions from latest TLEs (Skyfield) Planetary positions from JPL DE ephemerides Comet trajectories from NASA Horizons Deep-sky objects from fixed RA/Dec catalogs Local time zone + geolocation aware Daily Python pipeline generates user-specific events
