Asteroid 2017 SX20 is a near-Earth object catalogued by NASA under reference ID 3782014. Its estimated diameter is 39–88 m (average 64 m), inferred from brightness rather than measured directly. Its closest catalogued approach to Earth occurs on Mon, Oct 2, 2017, missing by 14,812,396 km — 38.52 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
Size and brightness
Related close approaches
| Date | Orbiting | Miss (km) | Miss (LD) | Velocity (km/s) | Index |
|---|---|---|---|---|---|
| 25/09/08Thu, Sep 25, 2008 | Earth | 58,988,543 | 153.39 | 17.2 | 24 |
| 29/09/11Thu, Sep 29, 2011 | Earth | 39,696,015 | 103.22 | 15.2 | 23 |
| 01/10/14Wed, Oct 1, 2014 | Earth | 22,447,375 | 58.37 | 13.9 | 22 |
| 02/10/17Mon, Oct 2, 2017 | Earth | 14,812,396 | 38.52 | 13.3 | 22 |
| 04/10/20Sun, Oct 4, 2020 | Earth | 26,133,334 | 67.95 | 13.5 | 22 |
| 06/10/23Fri, Oct 6, 2023 | Earth | 44,106,556 | 114.69 | 14.5 | 22 |
| 06/10/26Tue, Oct 6, 2026 | Earth | 63,429,518 | 164.94 | 16.0 | 23 |
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.
Learn about close approaches
Today's catalogued close approaches, ranked.
What counts as a near-Earth object, and today's list.
What a close approach is and how it's measured.
Where the data comes from and how often it updates.
What NASA's PHA label does and doesn't mean.
1 LD = 384,400 km — the yardstick for flybys.
Why a close approach is a schedule, not a warning.
From first detection to orbit refinement.