2021 TK10
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	22 Jan 2026	33.1	2.815 AU	3.561 AU	17h45m	-20°38'	35.2°	11.6°

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
2026-01-22 00:00 UT   17 45 03.6   -20 38 44     3.561    2.815   35.2   11.6   275   33.1 
2026-01-22 00:40 UT   17 45 06.1   -20 38 44     3.561    2.815   35.2   11.6   275   33.1 
2026-01-23 00:00 UT   17 46 33.3   -20 38 37     3.551    2.813   35.9   11.8   275   33.1 
2026-01-24 00:00 UT   17 48 02.9   -20 38 26     3.541    2.811   36.5   12.0   275   33.1 
2026-01-25 00:00 UT   17 49 32.2   -20 38 11     3.530    2.810   37.2   12.2   275   33.1 
2026-01-26 00:00 UT   17 51 01.4   -20 37 52     3.520    2.808   37.9   12.4   274   33.1 
2026-01-27 00:00 UT   17 52 30.3   -20 37 30     3.509    2.806   38.5   12.6   274   33.1 
2026-01-28 00:00 UT   17 53 59.0   -20 37 03     3.498    2.805   39.2   12.8   274   33.1 
2026-01-29 00:00 UT   17 55 27.5   -20 36 33     3.487    2.803   39.9   13.0   274   33.1 
2026-01-30 00:00 UT   17 56 55.7   -20 35 59     3.476    2.801   40.5   13.2   274   33.1 
2026-01-31 00:00 UT   17 58 23.7   -20 35 22     3.464    2.799   41.2   13.4   273   33.1 
2026-02-01 00:00 UT   17 59 51.4   -20 34 41     3.453    2.798   41.9   13.6   273   33.1 
2026-02-02 00:00 UT   18 01 18.9   -20 33 56     3.441    2.796   42.5   13.8   273   33.1 
2026-02-03 00:00 UT   18 02 46.2   -20 33 07     3.430    2.794   43.2   14.0   273   33.1 
2026-02-04 00:00 UT   18 04 13.1   -20 32 15     3.418    2.792   43.9   14.2   273   33.1 
2026-02-05 00:00 UT   18 05 39.9   -20 31 19     3.406    2.790   44.6   14.4   272   33.1 
2026-02-06 00:00 UT   18 07 06.3   -20 30 20     3.393    2.788   45.2   14.5   272   33.1 
2026-02-07 00:00 UT   18 08 32.4   -20 29 17     3.381    2.787   45.9   14.7   272   33.1 
2026-02-08 00:00 UT   18 09 58.3   -20 28 10     3.369    2.785   46.6   14.9   272   33.1 
2026-02-09 00:00 UT   18 11 23.9   -20 26 60     3.356    2.783   47.3   15.1   272   33.1 
2026-02-10 00:00 UT   18 12 49.1   -20 25 46     3.343    2.781   47.9   15.3   271   33.1 
2026-02-11 00:00 UT   18 14 14.1   -20 24 29     3.331    2.779   48.6   15.5   271   33.1 
2026-02-12 00:00 UT   18 15 38.7   -20 23 08     3.318    2.777   49.3   15.6   271   33.1 
2026-02-13 00:00 UT   18 17 03.0   -20 21 44     3.305    2.775   50.0   15.8   271   33.1 
2026-02-14 00:00 UT   18 18 26.9   -20 20 16     3.291    2.773   50.7   16.0   271   33.1 
2026-02-15 00:00 UT   18 19 50.5   -20 18 45     3.278    2.771   51.3   16.2   270   33.1 
2026-02-16 00:00 UT   18 21 13.7   -20 17 11     3.265    2.769   52.0   16.3   270   33.1 

    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.