(138971) 2001 CB21
ephemeris date magn radius delta (AU) delta (LD) delta (km) ra dec elong phase
Today23 Oct 202121.01.378 AU1.115 AU433.79 LD166,779,355 km08h54m+27°36'81.3°45.5°
Brightest28 Feb 202214.01.003 AU0.041 AU16.11 LD6,194,306 km15h51m+27°49'105.6°72.2°
Approach4 Mar 202214.90.981 AU0.033 AU12.75 LD4,903,151 km18h29m+17°16'70.6°107.6°

Based on its absolute magnitude (Hₒ) of 18.4 and an albedo between 0.25 and 0.05, the estimated diameter of (138971) 2001 CB21 is 560 - 1255 m.

(138971) 2001 CB21- 2021-10-23

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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.