(163899) 2003 SD220
ephemeris date magn radius delta (AU) delta (LD) delta (km) ra dec elong phase
Today20 Oct 202117.00.968 AU0.162 AU62.87 LD24,172,378 km11h35m+61°20'75.5°95.2°
Brightest13 Dec 202113.60.986 AU0.039 AU15.19 LD5,838,981 km21h09m+54°21'91.6°86.2°
Approach17 Dec 202113.80.980 AU0.036 AU14.10 LD5,420,501 km21h49m+33°16'81.9°96.0°

Based on its absolute magnitude (Hₒ) of 17.7 and an albedo between 0.25 and 0.05, the estimated diameter of (163899) 2003 SD220 is 780 - 1745 m.

(163899) 2003 SD220- 2021-10-20

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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.