Near-Earth Object
523609 (2005 PJ2
NASA ID: 20523609
523609 (2005 PJ2 will pass Earth on 27 August 2026 at a distance of 18.41 lunar distances (LD) - about 7,077,354 km - travelling at 81,898 km/h. Its estimated diameter is between 330 and 738 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
27 August 2026
In 68 days
Miss Distance
18.41 LD
7,077,354 km
18 times the Moon's distance from Earth
Velocity
81,898 km/h
3.0 times the orbital speed of the International Space Station
Est. Diameter
330–738 m
Absolute Magnitude
H = 19.53
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 523609 (2005 PJ2 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 523609 (2005 PJ2 to Earth between 1908 and 2085, 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 →
