Asteroid 101955 Bennu (1999 RQ36)
Reported by NASA JPL CNEOS (Sentry) today.
What the source measured
NASA JPL CNEOS (Sentry) reported: Asteroid 101955 Bennu (1999 RQ36) has a cumulative impact probability of 5.72e-4 over 157 potential impact(s) in the range 2178-2290. Palermo scale: -1.58, Torino scale: N/A. Estimated diameter: 0.490 km. Last observed: 2020-10-3.80160.
How we know
One source: NASA JPL CNEOS (Sentry). Not yet confirmed by a second, independent source.
Our own score for this event is 10 out of 100.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
Computed under scoring rules v5. Rows carrying other versions were judged by different rules and are not directly comparable.
Series begins 8 March 2026. Comparisons refer to that period only. Collection gap: 14-26 August 2026.
This data is aggregated algorithmically from scientific sources. Not a replacement for official emergency warnings.
Event data
| Type | Asteroid |
| Severity | Low |
| Calamity Score (ours) | 10 / 100 |
| Legacy data-support index | 0.57/1 |
| Date | 2026-10-12, time not reported by the source |
| Source | https://cneos.jpl.nasa.gov/sentry/details.html#?des=101955 |
| Licence | US public domain (NASA) · NASA JPL CNEOS (Sentry) |
Physical priority index · v5. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: jpl_sentry. Occurrence: 2026-10-12, time not reported by the source.
First archived: 2026-08-31T09:00:15.192Z. Material modification: 2026-10-12T00:20:48.363Z.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
4 retained revisions changed source fields this page does not show; the index, severity and version stayed the same.
Score breakdown
Technical details
| Designation | 101955 |
| Fullname | 101955 Bennu (1999 RQ36) |
| Ps Max | -1.58 |
| ImpactProbability | 0 |
| DiameterKm | 0.49 |
| NImpacts | 157 |
| ImpactRange | 2178-2290 |
| LastObs | 2020-10-3.80160 |
| VInfinity | 5.99 |
Safety information
What to do about asteroids and fireballs
There is nothing to do about an asteroid on a watch list: the chance of impact is tiny and is watched every day. A fireball in the sky is another matter, and harmless too.
For this reportAsteroid
Nothing to do
Objects on the risk lists are followed by NASA and ESA. Their chances of impact are tiny, and usually fall to zero as observations accumulate.
NASA CNEOSSaw a fireball? Report it
Time, place and direction help astronomers find its path, and sometimes its meteorites.
IMOFound a meteorite?
It is not hot or radioactive. Photograph it where it lies, note the place and tell a museum or university.
NASA
Before, during, after. Here it is still “before”.
Before · Any time
Read the official lists
NASA’s Sentry and ESA’s risk list, not alarming headlines.
NASA CNEOS
During · If a bright fireball passes
Note what you saw
Time, direction, colour, sound.
IMO
After · Afterwards
Report it
To the International Meteor Organization.
IMO
If a life is in danger
Call your local emergency number
Questions people ask
Is an asteroid going to hit the Earth?
None is known to. A few objects keep a tiny chance of impact while their orbits are refined, and that chance usually drops to zero with more observations. Source: NASA CNEOS.
Are fireballs dangerous?
Almost never. Most burn up high in the atmosphere. Source: NASA CNEOS.