2021 SM3
ephemeris date magn radius delta (AU) delta (LD) delta (km) ra dec elong phase
Brightest13 Oct 202117.91.015 AU0.038 AU14.61 LD5,615,912 km05h34m+11°49'115.7°62.4°
Approach15 Oct 202118.31.001 AU0.033 AU12.94 LD4,973,496 km07h14m+26°21'94.9°83.2°
Today23 Oct 202122.60.945 AU0.079 AU30.81 LD11,846,527 km12h21m+33°20'49.3°127.0°

Based on its absolute magnitude (Hₒ) of 22.8 and an albedo between 0.25 and 0.05, the estimated diameter of 2021 SM3 is 75 - 165 m.

2021 SM3- 2021-10-23
astro.vanbuitenen.nl


 
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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.