Near-Earth Object
2021 KS1
NASA ID: 54147140
2021 KS1 will pass Earth on 20 September 2026 at a distance of 82.74 lunar distances (LD) - about 31,803,523 km - travelling at 19,385 km/h. Its estimated diameter is between 6 and 13 metres, roughly the size of a double-decker bus (around 11 m long). NASA does not classify it as potentially hazardous.
Close Approach Date
20 September 2026
In 88 days
Miss Distance
82.74 LD
31,803,523 km
83 times the Moon's distance from Earth
Velocity
19,385 km/h
0.7 times the orbital speed of the International Space Station
Est. Diameter
6–13 m
Absolute Magnitude
H = 28.28
The brightness measure astronomers use to estimate size
Hazard Classification
Not Hazardous
The real orbit in 3D
The actual path of 2021 KS1 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 2021 KS1 to Earth between 2021 and 2042, 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 →
