2021 SM1
ephemeris date magn radius delta (AU) delta (LD) delta (km) ra dec elong phase
Brightest12 Oct 202118.61.014 AU0.021 AU7.98 LD3,067,276 km03h14m+30°58'142.4°36.9°
Approach14 Oct 202119.01.005 AU0.018 AU6.87 LD2,640,810 km05h38m+31°54'115.6°63.5°
Today22 Oct 202122.60.981 AU0.035 AU13.63 LD5,239,734 km09h39m+09°20'64.5°113.7°

Based on its absolute magnitude (Hₒ) of 25.5 and an albedo between 0.25 and 0.05, the estimated diameter of 2021 SM1 is 20 - 45 m.

2021 SM1- 2021-10-22

-1 year
-1 month
-1 day
+1 day
+1 month
+1 year

The interactive orbit chart above shows the near-earth object's path through the solar system and its position at the given date. Green and blue lines are shown perpendicular to the ecliptic plane: Green if the path is above the ecliptic plane, blue if it is below.

(Left-click and drag to rotate the view; right-click and drag to move the view; use scroll wheel to zoom in our out.)

The light curve chart below shows the estimated development of the NEO's magnitude during its approach to earth.

The following all-sky chart shows the path of the NEO in the coming months.

The following chart shows the path of the NEO in the coming days or hours. The field of view is optimized for (~10x50) binoculars and finderscopes. A more printer-friendly version of the same chart can be found below.