2013 TD
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	20 Dec 2025	33.1	3.622 AU	3.702 AU	12h37m	-04°27'	77.7°	15.4°

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 2013 TD are:

            e (Eccentricity)                : 0.5668242
            a (Semimajor axis)              : 2.3121608
            i (Inclination)                 : 0.43538
            Ω (Longitude of ascending node) : 254.89882
            ω (Argument of perihelion)      : 101.14660
            M (Mean anomaly)                : 168.45721
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 176.04573
            B (Latitude of perihelion)      : 0.42717
            P (Orbital period in years)     : 3.52            
        

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
2025-12-20 00:00 UT   12 37 10.3   -04 27 36     3.702    3.622   77.7   15.4   293   33.1 
2025-12-20 12:23 UT   12 37 26.6   -04 29 23     3.694    3.622   78.1   15.4   293   33.1 
2025-12-21 00:00 UT   12 37 41.8   -04 31 03     3.686    3.622   78.6   15.4   293   33.1 
2025-12-22 00:00 UT   12 38 12.5   -04 34 26     3.671    3.622   79.4   15.5   293   33.1 
2025-12-23 00:00 UT   12 38 42.5   -04 37 44     3.655    3.622   80.3   15.5   293   33.1 
2025-12-24 00:00 UT   12 39 11.8   -04 40 57     3.640    3.622   81.2   15.6   293   33.1 
2025-12-25 00:00 UT   12 39 40.2   -04 44 04     3.624    3.622   82.1   15.6   293   33.0 
2025-12-26 00:00 UT   12 40 07.9   -04 47 07     3.608    3.623   83.0   15.6   293   33.0 
2025-12-27 00:00 UT   12 40 34.7   -04 50 05     3.593    3.623   83.9   15.7   293   33.0 
2025-12-28 00:00 UT   12 41 00.7   -04 52 57     3.577    3.623   84.8   15.7   293   33.0 
2025-12-29 00:00 UT   12 41 25.9   -04 55 44     3.561    3.623   85.7   15.7   293   33.0 
2025-12-30 00:00 UT   12 41 50.2   -04 58 26     3.545    3.623   86.6   15.7   293   33.0 
2025-12-31 00:00 UT   12 42 13.7   -05 01 02     3.530    3.623   87.5   15.7   293   33.0 
2026-01-01 00:00 UT   12 42 36.4   -05 03 33     3.514    3.623   88.4   15.7   293   33.0 
2026-01-02 00:00 UT   12 42 58.1   -05 05 58     3.498    3.623   89.4   15.7   293   33.0 
2026-01-03 00:00 UT   12 43 19.0   -05 08 18     3.482    3.623   90.3   15.7   293   33.0 
2026-01-04 00:00 UT   12 43 38.9   -05 10 32     3.466    3.623   91.2   15.7   293   33.0 
2026-01-05 00:00 UT   12 43 58.0   -05 12 40     3.450    3.623   92.1   15.7   293   32.9 
2026-01-06 00:00 UT   12 44 16.1   -05 14 42     3.434    3.623   93.1   15.7   293   32.9 
2026-01-07 00:00 UT   12 44 33.3   -05 16 39     3.418    3.623   94.0   15.7   293   32.9 
2026-01-08 00:00 UT   12 44 49.5   -05 18 29     3.402    3.622   95.0   15.7   293   32.9 
2026-01-09 00:00 UT   12 45 04.8   -05 20 13     3.386    3.622   95.9   15.7   293   32.9 
2026-01-10 00:00 UT   12 45 19.1   -05 21 52     3.371    3.622   96.9   15.6   293   32.9 
2026-01-11 00:00 UT   12 45 32.4   -05 23 24     3.355    3.622   97.8   15.6   293   32.9 
2026-01-12 00:00 UT   12 45 44.7   -05 24 49     3.339    3.622   98.8   15.6   293   32.9 
2026-01-13 00:00 UT   12 45 56.0   -05 26 08     3.323    3.622   99.8   15.5   293   32.9 
2026-01-14 00:00 UT   12 46 06.2   -05 27 21     3.307    3.622  100.7   15.5   293   32.8 
2026-01-15 00:00 UT   12 46 15.4   -05 28 27     3.292    3.622  101.7   15.4   293   32.8 
2026-01-16 00:00 UT   12 46 23.6   -05 29 27     3.276    3.621  102.7   15.4   293   32.8 
2026-01-17 00:00 UT   12 46 30.6   -05 30 20     3.260    3.621  103.7   15.3   293   32.8 
2026-01-18 00:00 UT   12 46 36.7   -05 31 06     3.245    3.621  104.7   15.2   293   32.8 
2026-01-19 00:00 UT   12 46 41.6   -05 31 45     3.229    3.621  105.7   15.2   293   32.8 

    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.