NASA / JPL ID: 3883107

Asteroid 2019 UM8 Close Approach

Not flagged as hazardousNASA/JPL page

Notable Pass

Asteroid 2019 UM8 is a near-Earth object catalogued by NASA under reference ID 3883107. Its estimated diameter is 6–12 m (average 9 m), inferred from brightness rather than measured directly. Its closest catalogued approach to Earth occurs on Wed, Oct 30, 2019, missing by 2,270,163 km — 5.90 lunar distances. NASA does not classify it as a potentially hazardous asteroid.

This score ranks how notable the asteroid approach is. It is not an impact prediction.

Closest approach

Approach date

2019-Oct-30 20:42

Miss distance (km)

2,270,163 km

Miss distance (LD)

5.90 LD

Miss distance (AU)

0.0152 AU

Relative velocity

7.0 km/s

Orbitfall Index

40/100

Size and brightness

Diameter range

6–12 m

Average diameter

9 m

Absolute magnitude

28.40

Related close approaches

Date	Orbiting	Miss (km)	Miss (LD)	Velocity (km/s)	Index
05/10/78Thu, Oct 5, 1978	Mars	13,186,596	34.29	6.4	12
23/02/81Mon, Feb 23, 1981	Earth	33,813,243	87.92	11.2	14
01/03/06Wed, Mar 1, 2006	Earth	49,287,489	128.16	14.7	16
27/09/10Mon, Sep 27, 2010	Mars	14,085,967	36.63	5.9	11
11/02/13Mon, Feb 11, 2013	Earth	20,115,012	52.31	6.2	11
30/10/19Wed, Oct 30, 2019	Earth	2,270,163	5.90	7.0	40
20/03/20Fri, Mar 20, 2020	Earth	39,850,258	103.62	5.2	11
04/10/26Sun, Oct 4, 2026	Earth	61,974,605	161.15	18.2	17
02/05/27Sun, May 2, 2027	Earth	66,830,317	173.78	8.0	12
05/03/31Wed, Mar 5, 2031	Earth	57,424,852	149.32	16.5	17

Data source

All figures on this page come from NASA's Near Earth Object Web Service, maintained by the Center for Near-Earth Object Studies at JPL. The Orbitfall Index is calculated by Orbitfall from those values — see the methodology and the NASA asteroid tracker overview. For current passes, see asteroids passing Earth today.

Asteroid guide

Learn about close approaches

Asteroids passing Earth today

Today's catalogued close approaches, ranked.

Near-Earth objects today

What counts as a near-Earth object, and today's list.

Asteroid close approaches

What a close approach is and how it's measured.

NASA asteroid tracker

Where the data comes from and how often it updates.

Potentially hazardous asteroids

What NASA's PHA label does and doesn't mean.

Lunar distance explained

1 LD = 384,400 km — the yardstick for flybys.

Close approach explained

Why a close approach is a schedule, not a warning.

How NASA tracks asteroids

From first detection to orbit refinement.