NASA/JPL planetary defense · checked daily
A calm, evidence-first view of close approaches, impact-risk changes, and atmospheric fireballs—without turning every asteroid into an alarm.
Right now
Risk is more than a probability. These summaries keep distance, size, and the public communication scales in view together.
Current posture
Every object currently in the Sentry table is Torino 0: no unusual level of public concern. Tiny modeled probabilities can still appear in the catalog.
The 2029 anchor
A roughly 340 m asteroid will pass inside geostationary orbit on 13 April 2029. NASA has ruled out an impact during this encounter.
The next 30 days
CNEOS passes within 5 lunar distances, ordered soonest first. “Closer watch” describes the pass—not a hazard forecast.
In 3 days
A close approach is a measured miss distance, not an impact prediction. Size is estimated from brightness and assumed reflectivity.
In 24 days
A close approach is a measured miss distance, not an impact prediction. Size is estimated from brightness and assumed reflectivity.
LD means one average Earth–Moon distance, about 384,400 km. Download this approach window as JSON.
CNEOS Sentry
Start with 254 objects crossing at least one watch rule, or inspect all 2,243. A place in Sentry is not a prediction of impact.
Other signals
Bright fireballs are normal evidence of small space rocks meeting the atmosphere. Source health shows whether the daily view is complete.
Last 30 days
No fireball above the reporting floor in this snapshot.
Energy is estimated total impact energy in kilotons of TNT. CNEOS reporting can arrive days or weeks after an event.
Daily ingest
A transient source failure keeps its previous snapshot and is retried next run, so missed changes are not silently discarded.
The honesty layer
The source data is authoritative; the attention rules are deliberately plain, version-controlled, and visible here.
The public communication scale combines likelihood and consequence. Zero means no unusual public concern; a move above zero is always surfaced.
Read the CNEOS guide ↗Compares a modeled impact risk with the ordinary background hazard. Negative values are below background; the watch floor is -3.0.
Read the CNEOS guide ↗A small object can carry a larger probability and still pose little consequence. The watcher also considers diameter, scale ratings, and material change.
Open CNEOS Sentry ↗