2021 UJ3
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	9 Apr 2026	32.4	3.283 AU	2.580 AU	09h44m	+06°21'	127.1°	14.1°

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 UJ3 are:

            e (Eccentricity)                : 0.5779991
            a (Semimajor axis)              : 2.0829322
            i (Inclination)                 : 6.67446
            Ω (Longitude of ascending node) : 213.60260
            ω (Argument of perihelion)      : 124.13298
            M (Mean anomaly)                : 141.64056
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 157.91678
            B (Latitude of perihelion)      : 5.52075
            P (Orbital period in years)     : 3.01            
        

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
2026-04-09 00:00 UT   09 44 28.9   +06 21 03     2.580    3.283  127.1   14.1   104   32.4 
2026-04-09 04:35 UT   09 44 24.9   +06 21 54     2.583    3.283  126.9   14.1   104   32.4 
2026-04-10 00:00 UT   09 44 08.7   +06 25 26     2.592    3.283  126.0   14.3   104   32.5 
2026-04-11 00:00 UT   09 43 50.0   +06 29 41     2.604    3.282  125.0   14.5   105   32.5 
2026-04-12 00:00 UT   09 43 32.5   +06 33 49     2.616    3.282  123.9   14.7   105   32.5 
2026-04-13 00:00 UT   09 43 16.5   +06 37 51     2.628    3.282  122.9   14.9   105   32.5 
2026-04-14 00:00 UT   09 43 01.8   +06 41 45     2.640    3.281  121.8   15.1   105   32.5 
2026-04-15 00:00 UT   09 42 48.4   +06 45 32     2.652    3.281  120.8   15.2   105   32.5 
2026-04-16 00:00 UT   09 42 36.4   +06 49 12     2.665    3.280  119.7   15.4   106   32.6 
2026-04-17 00:00 UT   09 42 25.8   +06 52 44     2.677    3.280  118.7   15.6   106   32.6 
2026-04-18 00:00 UT   09 42 16.5   +06 56 10     2.690    3.279  117.7   15.7   106   32.6 
2026-04-19 00:00 UT   09 42 08.6   +06 59 28     2.703    3.279  116.7   15.9   106   32.6 
2026-04-20 00:00 UT   09 42 01.9   +07 02 39     2.716    3.278  115.7   16.0   106   32.6 
2026-04-21 00:00 UT   09 41 56.6   +07 05 42     2.729    3.278  114.6   16.2   106   32.6 
2026-04-22 00:00 UT   09 41 52.7   +07 08 39     2.742    3.277  113.7   16.3   106   32.6 
2026-04-23 00:00 UT   09 41 50.0   +07 11 28     2.755    3.277  112.7   16.4   107   32.7 
2026-04-24 00:00 UT   09 41 48.6   +07 14 09     2.769    3.276  111.7   16.6   107   32.7 
2026-04-25 00:00 UT   09 41 48.4   +07 16 44     2.782    3.275  110.7   16.7   107   32.7 
2026-04-26 00:00 UT   09 41 49.6   +07 19 11     2.795    3.275  109.7   16.8   107   32.7 
2026-04-27 00:00 UT   09 41 52.0   +07 21 31     2.809    3.274  108.7   16.9   107   32.7 
2026-04-28 00:00 UT   09 41 55.6   +07 23 44     2.823    3.274  107.8   17.0   107   32.7 
2026-04-29 00:00 UT   09 42 00.4   +07 25 50     2.836    3.273  106.8   17.1   107   32.7 
2026-04-30 00:00 UT   09 42 06.5   +07 27 49     2.850    3.272  105.9   17.2   108   32.8 
2026-05-01 00:00 UT   09 42 13.8   +07 29 41     2.864    3.272  104.9   17.3   108   32.8 
2026-05-02 00:00 UT   09 42 22.2   +07 31 25     2.878    3.271  104.0   17.4   108   32.8 
2026-05-03 00:00 UT   09 42 31.8   +07 33 03     2.892    3.270  103.1   17.5   108   32.8 
2026-05-04 00:00 UT   09 42 42.5   +07 34 34     2.906    3.269  102.1   17.5   108   32.8 
2026-05-05 00:00 UT   09 42 54.4   +07 35 58     2.920    3.269  101.2   17.6   108   32.8 
2026-05-06 00:00 UT   09 43 07.5   +07 37 15     2.934    3.268  100.3   17.7   108   32.8 
2026-05-07 00:00 UT   09 43 21.6   +07 38 26     2.948    3.267   99.4   17.7   108   32.8 
2026-05-08 00:00 UT   09 43 36.8   +07 39 29     2.962    3.266   98.5   17.8   108   32.9 
2026-05-09 00:00 UT   09 43 53.2   +07 40 26     2.976    3.265   97.6   17.8   109   32.9 

    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.