2021 TK10
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	28 Aug 2026	30.7	1.991 AU	1.332 AU	18h00m	-17°26'	115.7°	27.2°

The interactive orbit chart above shows the body'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 orbital elements of 2021 TK10 are:

            e (Eccentricity)                : 0.5135835
            a (Semimajor axis)              : 1.9056152
            i (Inclination)                 : 4.08407
            Ω (Longitude of ascending node) : 196.56217
            ω (Argument of perihelion)      : 225.95684
            M (Mean anomaly)                : 189.42056
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 242.44621
            B (Latitude of perihelion)      : -2.93449
            P (Orbital period in years)     : 2.63            
        

The light curve chart below shows the estimated development of the minor planet's magnitude.

The all-sky chart below shows the path of the minor planet over the same period as the light curve. The current position is marked yellow.

The following chart shows the path of the minor planet in the next few days. The field of view is optimized for (~10x50) binoculars and finderscopes.

Ephemerides:

Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2026-08-28 00:00 UT   18 00 52.7   -17 26 29     1.332    1.991  115.7   27.2    93   30.7 
2026-08-28 19:50 UT   18 00 45.5   -17 28 52     1.337    1.986  114.9   27.5    93   30.7 
2026-08-29 00:00 UT   18 00 44.2   -17 29 22     1.338    1.985  114.7   27.5    93   30.7 
2026-08-30 00:00 UT   18 00 38.2   -17 32 15     1.343    1.978  113.7   27.9    93   30.8 
2026-08-31 00:00 UT   18 00 34.7   -17 35 09     1.348    1.972  112.8   28.2    92   30.8 
2026-09-01 00:00 UT   18 00 33.7   -17 38 02     1.354    1.966  111.8   28.5    92   30.8 
2026-09-02 00:00 UT   18 00 35.1   -17 40 56     1.359    1.960  110.8   28.8    92   30.8 
2026-09-03 00:00 UT   18 00 39.0   -17 43 50     1.365    1.954  109.9   29.0    92   30.8 
2026-09-04 00:00 UT   18 00 45.3   -17 46 43     1.370    1.947  109.0   29.3    92   30.8 
2026-09-05 00:00 UT   18 00 54.1   -17 49 37     1.376    1.941  108.0   29.6    92   30.8 
2026-09-06 00:00 UT   18 01 05.2   -17 52 30     1.381    1.935  107.1   29.9    92   30.8 
2026-09-07 00:00 UT   18 01 18.8   -17 55 22     1.387    1.929  106.2   30.1    91   30.8 
2026-09-08 00:00 UT   18 01 34.8   -17 58 15     1.393    1.922  105.3   30.4    91   30.8 
2026-09-09 00:00 UT   18 01 53.1   -18 01 06     1.398    1.916  104.4   30.6    91   30.9 
2026-09-10 00:00 UT   18 02 13.8   -18 03 57     1.404    1.909  103.5   30.9    91   30.9 
2026-09-11 00:00 UT   18 02 36.9   -18 06 47     1.410    1.903  102.6   31.1    91   30.9 
2026-09-12 00:00 UT   18 03 02.3   -18 09 36     1.415    1.897  101.8   31.3    91   30.9 
2026-09-13 00:00 UT   18 03 30.0   -18 12 24     1.421    1.890  100.9   31.5    91   30.9 
2026-09-14 00:00 UT   18 03 60.0   -18 15 10     1.426    1.884  100.1   31.7    91   30.9 
2026-09-15 00:00 UT   18 04 32.2   -18 17 56     1.432    1.877   99.2   31.9    90   30.9 
2026-09-16 00:00 UT   18 05 06.7   -18 20 40     1.438    1.871   98.4   32.1    90   30.9 
2026-09-17 00:00 UT   18 05 43.4   -18 23 22     1.443    1.864   97.6   32.3    90   30.9 
2026-09-18 00:00 UT   18 06 22.2   -18 26 03     1.449    1.858   96.8   32.5    90   30.9 
2026-09-19 00:00 UT   18 07 03.3   -18 28 42     1.454    1.851   95.9   32.7    90   30.9 
2026-09-20 00:00 UT   18 07 46.5   -18 31 18     1.460    1.845   95.1   32.8    90   30.9 
2026-09-21 00:00 UT   18 08 31.8   -18 33 53     1.465    1.838   94.3   33.0    90   30.9 
2026-09-22 00:00 UT   18 09 19.2   -18 36 26     1.471    1.831   93.6   33.2    89   30.9 
2026-09-23 00:00 UT   18 10 08.7   -18 38 56     1.476    1.825   92.8   33.3    89   30.9 
2026-09-24 00:00 UT   18 11 00.3   -18 41 24     1.481    1.818   92.0   33.5    89   31.0 
2026-09-25 00:00 UT   18 11 53.9   -18 43 50     1.487    1.811   91.2   33.6    89   31.0 
2026-09-26 00:00 UT   18 12 49.4   -18 46 13     1.492    1.805   90.5   33.8    89   31.0 
2026-09-27 00:00 UT   18 13 47.0   -18 48 33     1.497    1.798   89.7   33.9    89   31.0 

    Terminology:
            
    delta:  distance between minor planet and earth in AU
    radius: distance between minor planet and sun in AU
    magn:   magnitude (brightness) estimate    
    ra:     right ascension in hours (24h = 360deg)
    dec:    declination in degrees
    elong:  elongation in degrees (angle sun-earth-minor planet)    
    phase:  phase angle in degrees (angle sun-minor planet-earth)        
    AU:     Astronomical Unit (mean distance between earth and sun: 149597870.7 km
    

Orbital elements provided by the MPC (Minor Planet Center).
Calculations by a modified version of AAPlus, a C# implementation of the AA+ project by PJ Naughter from the algorithms presented in the book "Astronomical Algorithms" by Jean Meeus.
NGC2000 dso catalog and star labels from VizieR as provided by the Strasbourg astronomical Data Center.
Tycho2 catalog from the ESO archive.