2021 TJ12
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	17 Oct 2025	28.6	1.022 AU	1.599 AU	10h59m	+01°00'	38.2°	37.1°

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 TJ12 are:

            e (Eccentricity)                : 0.4160424
            a (Semimajor axis)              : 1.5268382
            i (Inclination)                 : 8.29066
            Ω (Longitude of ascending node) : 201.05911
            ω (Argument of perihelion)      : 231.67345
            M (Mean anomaly)                : 296.71268
            Epoch                           : 2025 May 05

            L (Longitude of perihelion)     : 252.43937
            B (Latitude of perihelion)      : -6.49516
            P (Orbital period in years)     : 1.89            
        

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
2025-10-17 00:00 UT   10 59 20.6   +01 00 08     1.599    1.022   38.2   37.1   286   28.6 
2025-10-17 23:52 UT   11 02 41.2   +00 40 22     1.604    1.027   38.2   36.9   286   28.6 
2025-10-18 00:00 UT   11 02 42.3   +00 40 15     1.604    1.027   38.2   36.9   286   28.6 
2025-10-19 00:00 UT   11 06 02.6   +00 20 29     1.609    1.033   38.3   36.7   286   28.6 
2025-10-20 00:00 UT   11 09 21.7   +00 00 50     1.614    1.038   38.4   36.6   287   28.7 
2025-10-21 00:00 UT   11 12 39.4   +00 18 41     1.618    1.044   38.5   36.5   287   28.7 
2025-10-22 00:00 UT   11 15 55.8   +00 38 04     1.623    1.049   38.6   36.3   287   28.7 
2025-10-23 00:00 UT   11 19 10.9   +00 57 20     1.627    1.055   38.8   36.2   287   28.7 
2025-10-24 00:00 UT   11 22 24.7   -01 16 27     1.632    1.060   38.9   36.1   287   28.7 
2025-10-25 00:00 UT   11 25 37.3   -01 35 26     1.636    1.066   39.0   36.0   287   28.7 
2025-10-26 00:00 UT   11 28 48.7   -01 54 17     1.640    1.072   39.1   35.8   287   28.7 

    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.