2021 UJ3
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	24 Oct 2025	33.1	3.119 AU	3.598 AU	10h25m	+03°56'	54.0°	14.9°

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
2025-10-24 00:00 UT   10 25 40.7   +03 56 05     3.598    3.119   54.0   14.9   287   33.1 
2025-10-24 16:06 UT   10 26 17.1   +03 51 49     3.592    3.120   54.5   15.0   288   33.1 
2025-10-25 00:00 UT   10 26 34.8   +03 49 44     3.588    3.121   54.7   15.1   288   33.1 
2025-10-26 00:00 UT   10 27 28.4   +03 43 24     3.578    3.123   55.4   15.2   288   33.1 
2025-10-27 00:00 UT   10 28 21.4   +03 37 07     3.567    3.126   56.2   15.3   288   33.1 
2025-10-28 00:00 UT   10 29 13.7   +03 30 51     3.557    3.128   56.9   15.4   288   33.1 
2025-10-29 00:00 UT   10 30 05.5   +03 24 37     3.546    3.130   57.7   15.6   288   33.1 
2025-10-30 00:00 UT   10 30 56.7   +03 18 26     3.535    3.132   58.5   15.7   288   33.1 
2025-10-31 00:00 UT   10 31 47.3   +03 12 16     3.524    3.135   59.2   15.8   288   33.1 
2025-11-01 00:00 UT   10 32 37.2   +03 06 09     3.513    3.137   60.0   15.9   289   33.1 
2025-11-02 00:00 UT   10 33 26.5   +03 00 04     3.502    3.139   60.7   16.0   289   33.1 
2025-11-03 00:00 UT   10 34 15.2   +02 54 01     3.491    3.141   61.5   16.1   289   33.1 
2025-11-04 00:00 UT   10 35 03.2   +02 48 00     3.479    3.143   62.3   16.2   289   33.1 
2025-11-05 00:00 UT   10 35 50.6   +02 42 02     3.468    3.146   63.1   16.3   289   33.1 
2025-11-06 00:00 UT   10 36 37.3   +02 36 07     3.456    3.148   63.8   16.4   289   33.1 
2025-11-07 00:00 UT   10 37 23.4   +02 30 14     3.444    3.150   64.6   16.5   289   33.1 
2025-11-08 00:00 UT   10 38 08.7   +02 24 23     3.433    3.152   65.4   16.6   289   33.1 
2025-11-09 00:00 UT   10 38 53.4   +02 18 36     3.421    3.154   66.2   16.7   289   33.1 
2025-11-10 00:00 UT   10 39 37.3   +02 12 51     3.408    3.156   67.0   16.8   290   33.1 
2025-11-11 00:00 UT   10 40 20.6   +02 07 09     3.396    3.158   67.8   16.9   290   33.0 
2025-11-12 00:00 UT   10 41 03.1   +02 01 30     3.384    3.160   68.6   17.0   290   33.0 
2025-11-13 00:00 UT   10 41 44.9   +01 55 54     3.372    3.162   69.4   17.0   290   33.0 
2025-11-14 00:00 UT   10 42 25.9   +01 50 21     3.359    3.164   70.2   17.1   290   33.0 
2025-11-15 00:00 UT   10 43 06.2   +01 44 51     3.346    3.166   71.0   17.2   290   33.0 
2025-11-16 00:00 UT   10 43 45.7   +01 39 25     3.334    3.168   71.8   17.3   290   33.0 
2025-11-17 00:00 UT   10 44 24.4   +01 34 03     3.321    3.170   72.7   17.3   290   33.0 
2025-11-18 00:00 UT   10 45 02.3   +01 28 43     3.308    3.172   73.5   17.4   290   33.0 
2025-11-19 00:00 UT   10 45 39.4   +01 23 28     3.295    3.174   74.3   17.4   291   33.0 
2025-11-20 00:00 UT   10 46 15.7   +01 18 16     3.282    3.176   75.1   17.5   291   33.0 
2025-11-21 00:00 UT   10 46 51.2   +01 13 08     3.269    3.178   76.0   17.6   291   33.0 
2025-11-22 00:00 UT   10 47 25.8   +01 08 04     3.256    3.180   76.8   17.6   291   33.0 
2025-11-23 00:00 UT   10 47 59.5   +01 03 04     3.243    3.181   77.7   17.7   291   33.0 

    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.