Near-Earth Object
2021 TM
NASA ID: 54201811
2021 TM will pass Earth on 12 February 2027 at a distance of 58.22 lunar distances (LD) - about 22,380,620 km - travelling at 57,725 km/h. Its estimated diameter is between 9 and 20 metres, roughly the size of a double-decker bus (around 11 m long). NASA does not classify it as potentially hazardous.
Close Approach Date
12 February 2027
In 233 days
Miss Distance
58.22 LD
22,380,620 km
58 times the Moon's distance from Earth
Velocity
57,725 km/h
2.1 times the orbital speed of the International Space Station
Est. Diameter
9–20 m
Absolute Magnitude
H = 27.39
The brightness measure astronomers use to estimate size
Hazard Classification
Not Hazardous
The real orbit in 3D
The actual path of 2021 TM 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.
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 →
