Asteroid 2021 ER4

2021 ER4 is a near-Earth asteroid roughly 15 m across, about the size of a house. Its closest recorded pass was on 10 Mar 1904 at 2.5 lunar distances.

Estimated size

15 m

about the size of a house

Closest pass on record

2.48 LD

10 Mar 1904

Speed relative to Earth

13.5 km/s

Brightness (H)

27.12

Lower means larger

Past close approaches

Recorded passes within about 20 lunar distances since 1900.

2021 ER4
11 Mar 1982 · 16290 d ago · 15 m · 14.3 km/s
19.0 LD
7,311,748 km
2021 ER4
11 Jun 1975 · 18755 d ago · 15 m · 12.3 km/s
14.5 LD
5,584,349 km
2021 ER4
11 Mar 1939 · 31996 d ago · 15 m · 13.3 km/s
6.22 LD
2,391,527 km
2021 ER4
10 Jun 1932 · 34461 d ago · 15 m · 12.6 km/s
13.0 LD
4,984,295 km
2021 ER4
10 Mar 1904 · 44780 d ago · 15 m · 12.7 km/s
2.48 LD
953,844 km
2021 ER4
10 Mar 1900 · 46241 d ago · 15 m · 13.5 km/s
8.59 LD
3,302,411 km