Near-Earth Object
523934 (1998 FF14
NASA ID: 20523934
523934 (1998 FF14 will pass Earth on 28 September 2026 at a distance of 40.05 lunar distances (LD) - about 15,393,502 km - travelling at 84,523 km/h. Its estimated diameter is between 201 and 449 metres, roughly the size of The Shard in London (310 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
28 September 2026
In 95 days
Miss Distance
40.05 LD
15,393,502 km
40 times the Moon's distance from Earth
Velocity
84,523 km/h
3.1 times the orbital speed of the International Space Station
Est. Diameter
201–449 m
Absolute Magnitude
H = 20.61
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 523934 (1998 FF14 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 523934 (1998 FF14 to Earth between 1932 and 2099, 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 →
