Near-Earth Object
2021 KO2
NASA ID: 54149827
2021 KO2 will pass Earth on 29 May 2027 at a distance of 77.48 lunar distances (LD) - about 29,783,460 km - travelling at 39,166 km/h. Its estimated diameter is between 7 and 15 metres, roughly the size of a double-decker bus (around 11 m long). NASA does not classify it as potentially hazardous.
Close Approach Date
29 May 2027
In 340 days
Miss Distance
77.48 LD
29,783,460 km
77 times the Moon's distance from Earth
Velocity
39,166 km/h
1.4 times the orbital speed of the International Space Station
Est. Diameter
7–15 m
Absolute Magnitude
H = 28.02
The brightness measure astronomers use to estimate size
Hazard Classification
Not Hazardous
The real orbit in 3D
The actual path of 2021 KO2 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 KO2 to Earth between 1905 and 2024, 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 →
