Near-Earth Object
2024 TK21
NASA ID: 54492953
2024 TK21 will pass Earth on 16 October 2027 at a distance of 155.9 lunar distances (LD) - about 59,927,478 km - travelling at 68,500 km/h. Its estimated diameter is between 25 and 56 metres, roughly the size of a football pitch (around 105 m long). NASA does not classify it as potentially hazardous.
Close Approach Date
16 October 2027
In 347 days
Miss Distance
155.9 LD
59,927,478 km
156 times the Moon's distance from Earth
Velocity
68,500 km/h
2.5 times the orbital speed of the International Space Station
Est. Diameter
25–56 m
Absolute Magnitude
H = 25.14
The brightness measure astronomers use to estimate size
Hazard Classification
Not Hazardous
The real orbit in 3D
The actual path of 2024 TK21 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 2024 TK21 to Earth between 1959 and 2057, 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 →
