Asteroid Alerts
Flybys, fireballs, sky tonight
Free · Designed for iPad. Not verified for macOS.
Asteroid flybys and impact risks, fireballs, meteor showers, comets, eclipses, aurora, the Moon and planets, and space missions.
Know what's passing Earth, and what to step outside for tonight.
Asteroid Alerts follows every near-Earth asteroid, fireball and meteor shower that matters, and puts the one thing worth knowing on a single screen.
TODAY
The featured event: an asteroid on NASA's impact-risk list, a close flyby, a shower at its peak.
TONIGHT
Everything in your sky tonight, each with its own viewing window: the Moon, the planets, active meteor showers, comets bright enough to find, close pairings of the Moon and planets, and aurora when a forecast reaches your latitude. Times and directions are computed for your time zone's main city, or for where you are if you share an approximate location, with where to look.
CALENDAR
The next sixty days of flybys, meteor showers, eclipses, comets, aurora and mission milestones, day by day, with filters for each.
ASTEROID PAGES
Every asteroid passing nearby with its size and close approach distance, NASA's impact odds, and what an impact of that size would actually mean.
LEARN
Illustrated guides, from asteroids and comets to meteors, aurora, the Moon and planets, and the missions visiting them.
ALERTS WHEN IT MATTERS
Get notified when an asteroid is added to NASA's impact-risk list, when a rare close flyby is coming, when a major fireball lights up the sky, and when a mission reaches a milestone. Know about tonight's sky for meteor shower peaks, eclipses, strong aurora and bright comets.
FREE. NO ACCOUNT. NO ADS.
Ratings & Reviews
A new look, and a lot more to look at.
TODAY: one screen for the featured event, tonight's sky and what's coming up.
TONIGHT: the Moon, planets, showers, comets, pairings and aurora, each with its own viewing window in your time zone.
CALENDAR: upcoming flybys, showers, eclipses, comets and mission milestones.
LEARN: illustrated guides.
ASTEROID PAGES: every asteroid drawn to scale, with NASA's impact odds.
The developer, Francesca DeMeo, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Location
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Francesca DeMeo
- Size
- 32.8 MB
- Category
- Weather
- Compatibility
Requires iOS 15.1 or later.
- iPhone
Requires iOS 15.1 or later. - iPad
Requires iPadOS 15.1 or later. - iPod touch
Requires iOS 15.1 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Francesca DeMeo