1998 SD9
ephemeris date magn radius delta (AU) delta (LD) delta (km) ra dec elong phase
Brightest4 Oct 202119.61.003 AU0.032 AU12.37 LD4,755,917 km06h14m-23°21'94.1°84.1°
Approach6 Oct 202120.10.992 AU0.027 AU10.56 LD4,058,514 km08h01m-46°27'73.8°104.7°
Today23 Oct 202126.80.905 AU0.106 AU41.17 LD15,827,257 km15h10m-35°29'30.3°146.3°

Based on its absolute magnitude (Hₒ) of 24.1 and an albedo between 0.25 and 0.05, the estimated diameter of 1998 SD9 is 40 - 90 m.

1998 SD9- 2021-10-23
astro.vanbuitenen.nl


 
-1 year
-1 month
-1 day
Now
+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.