Asteroid 138971 2001 CB21
138971 2001 CB21 is a near-Earth asteroid roughly 779 m across, about the size of a small town. Its closest recorded pass was on 4 Mar 2022 at 12.8 lunar distances.
Estimated size
779 m
about the size of a small town
Closest pass on record
12.78 LD
4 Mar 2022
Speed relative to Earth
10.5 km/s
Brightness (H)
18.54
Lower means larger
Past close approaches
Recorded passes within about 20 lunar distances since 1900.
138971 2001 CB21
· 1687 d ago · 779 m · 12.0 km/s
12.8 LD
4,911,056 km
138971 2001 CB21
· 7319 d ago · 779 m · 12.3 km/s
18.6 LD
7,161,065 km
138971 2001 CB21
· 8990 d ago · 779 m · 10.3 km/s
17.5 LD
6,742,646 km
138971 2001 CB21
· 14993 d ago · 779 m · 10.4 km/s
18.7 LD
7,200,604 km
138971 2001 CB21
· 16663 d ago · 779 m · 12.0 km/s
13.3 LD
5,094,295 km
138971 2001 CB21
· 37273 d ago · 779 m · 10.5 km/s
17.6 LD
6,772,861 km