Near-Earth Object
137108 (1999 AN10
NASA ID: 20137108
137108 (1999 AN10 will pass Earth on 7 August 2027 at a distance of 1.01 lunar distances (LD) - about 389,855 km - travelling at 94,623 km/h. Its estimated diameter is between 652 and 1,459 metres, roughly the size of Ben Nevis (1,345 m tall). NASA classifies it as a potentially hazardous asteroid (PHA) - a designation based on size and orbital proximity, not on any predicted impact.
Close Approach Date
7 August 2027
In 322 days
Miss Distance
1.01 LD
389,855 km
About the Moon's distance from Earth
Velocity
94,623 km/h
3.4 times the orbital speed of the International Space Station
Est. Diameter
652–1,459 m
Absolute Magnitude
H = 18.05
The brightness measure astronomers use to estimate size
Hazard Classification
Potentially Hazardous
A watch-list label based on size and orbit, not a predicted impact
The real orbit in 3D
The actual path of 137108 (1999 AN10 around the Sun, computed from JPL orbital elements. Drag to rotate, scroll to zoom, and use the time controls to run the orbit forwards or back.
Every recorded pass
Each dot is one close approach of 137108 (1999 AN10 to Earth between 1939 and 2088, from JPL's records. Lower means closer: a dot under the dashed line passed nearer than the Moon. The orange dot is the approach on this page.
Size Comparison
Reading the Numbers
- A lunar distance (LD) is the average gap between Earth and the Moon, about 384,400 km. It is the standard yardstick for close approaches. Read more →
- Diameter estimates come from brightness. A dark surface reflects less light than a bright one, so the true size can sit anywhere in the quoted range. Read more →
- Potentially hazardous is a watch-list label based on size and orbital proximity. It does not mean an impact is expected. Read more →
