2021 TK10
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	18 Jun 2026	30.7	2.368 AU	1.405 AU	19h21m	-15°12'	155.7°	10.2°

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
2026-06-18 00:00 UT   19 21 35.2   -15 12 06     1.405    2.368  155.7   10.2   247   30.7 
2026-06-18 13:18 UT   19 20 59.4   -15 12 04     1.400    2.366  156.3    9.9   246   30.6 
2026-06-19 00:00 UT   19 20 30.1   -15 12 03     1.395    2.364  156.9    9.7   246   30.6 
2026-06-20 00:00 UT   19 19 23.1   -15 12 06     1.386    2.359  158.0    9.3   245   30.6 
2026-06-21 00:00 UT   19 18 14.2   -15 12 14     1.377    2.354  159.2    8.8   244   30.6 
2026-06-22 00:00 UT   19 17 03.6   -15 12 27     1.368    2.350  160.3    8.4   242   30.5 
2026-06-23 00:00 UT   19 15 51.3   -15 12 45     1.359    2.345  161.5    7.9   241   30.5 
2026-06-24 00:00 UT   19 14 37.3   -15 13 08     1.351    2.341  162.6    7.5   239   30.4 
2026-06-25 00:00 UT   19 13 21.7   -15 13 36     1.343    2.336  163.7    7.0   238   30.4 
2026-06-26 00:00 UT   19 12 04.5   -15 14 08     1.335    2.331  164.8    6.6   235   30.4 
2026-06-27 00:00 UT   19 10 45.9   -15 14 45     1.327    2.326  165.9    6.1   233   30.3 
2026-06-28 00:00 UT   19 09 25.8   -15 15 27     1.320    2.322  167.0    5.7   230   30.3 
2026-06-29 00:00 UT   19 08 04.3   -15 16 13     1.313    2.317  168.0    5.2   227   30.2 
2026-06-30 00:00 UT   19 06 41.5   -15 17 04     1.306    2.312  169.0    4.8   223   30.2 
2026-07-01 00:00 UT   19 05 17.5   -15 17 59     1.300    2.307  169.9    4.4   218   30.2 
2026-07-02 00:00 UT   19 03 52.3   -15 18 58     1.293    2.303  170.8    4.1   212   30.1 
2026-07-03 00:00 UT   19 02 26.0   -15 20 01     1.287    2.298  171.5    3.8   205   30.1 
2026-07-04 00:00 UT   19 00 58.8   -15 21 09     1.282    2.293  172.1    3.5   197   30.1 
2026-07-05 00:00 UT   18 59 30.6   -15 22 20     1.276    2.288  172.5    3.3   188   30.1 
2026-07-06 00:00 UT   18 58 01.6   -15 23 36     1.271    2.283  172.6    3.3   178   30.0 
2026-07-07 00:00 UT   18 56 31.9   -15 24 55     1.266    2.278  172.6    3.3   168   30.0 
2026-07-08 00:00 UT   18 55 01.6   -15 26 18     1.262    2.273  172.3    3.4   158   30.0 
2026-07-09 00:00 UT   18 53 30.7   -15 27 45     1.257    2.268  171.9    3.6   149   30.0 
2026-07-10 00:00 UT   18 51 59.4   -15 29 15     1.253    2.263  171.2    3.9   142   30.0 
2026-07-11 00:00 UT   18 50 27.7   -15 30 49     1.249    2.258  170.4    4.3   135   30.0 
2026-07-12 00:00 UT   18 48 55.8   -15 32 26     1.246    2.253  169.5    4.7   130   30.0 
2026-07-13 00:00 UT   18 47 23.8   -15 34 06     1.243    2.248  168.5    5.2   125   30.1 

    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.