2019 UN12
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	17 Dec 2025	28.1	3.397 AU	3.437 AU	22h57m	-03°00'	79.4°	16.5°

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 2019 UN12 are:

            e (Eccentricity)                : 0.8461801
            a (Semimajor axis)              : 2.2562223
            i (Inclination)                 : 5.19316
            Ω (Longitude of ascending node) : 222.54238
            ω (Argument of perihelion)      : 301.79588
            M (Mean anomaly)                : 264.59435
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 164.44390
            B (Latitude of perihelion)      : -4.41214
            P (Orbital period in years)     : 3.39            
        

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
2025-12-17 00:00 UT   22 57 06.7   -03 00 12     3.437    3.397   79.4   16.5    67   28.1 
2025-12-17 18:47 UT   22 57 25.0   -02 59 22     3.446    3.393   78.7   16.5    67   28.1 
2025-12-18 00:00 UT   22 57 30.2   -02 59 07     3.448    3.392   78.5   16.5    67   28.1 
2025-12-19 00:00 UT   22 57 54.6   -02 57 55     3.459    3.387   77.6   16.5    67   28.1 
2025-12-20 00:00 UT   22 58 19.9   -02 56 36     3.470    3.382   76.7   16.4    67   28.1 
2025-12-21 00:00 UT   22 58 46.1   -02 55 11     3.481    3.377   75.8   16.4    67   28.1 
2025-12-22 00:00 UT   22 59 13.2   -02 53 40     3.491    3.371   74.9   16.4    66   28.1 
2025-12-23 00:00 UT   22 59 41.2   -02 52 02     3.502    3.366   74.0   16.3    66   28.1 
2025-12-24 00:00 UT   23 00 10.1   -02 50 18     3.512    3.361   73.1   16.3    66   28.1 
2025-12-25 00:00 UT   23 00 39.7   -02 48 28     3.523    3.356   72.2   16.2    66   28.1 
2025-12-26 00:00 UT   23 01 10.3   -02 46 32     3.533    3.350   71.3   16.1    66   28.1 
2025-12-27 00:00 UT   23 01 41.6   -02 44 30     3.543    3.345   70.4   16.1    66   28.1 
2025-12-28 00:00 UT   23 02 13.8   -02 42 22     3.553    3.339   69.6   16.0    66   28.1 
2025-12-29 00:00 UT   23 02 46.8   -02 40 08     3.563    3.334   68.7   15.9    66   28.1 
2025-12-30 00:00 UT   23 03 20.5   -02 37 49     3.573    3.329   67.8   15.9    66   28.1 
2025-12-31 00:00 UT   23 03 55.1   -02 35 23     3.583    3.323   66.9   15.8    66   28.1 
2026-01-01 00:00 UT   23 04 30.4   -02 32 52     3.593    3.318   66.1   15.7    66   28.1 
2026-01-02 00:00 UT   23 05 06.4   -02 30 16     3.602    3.312   65.2   15.6    66   28.1 
2026-01-03 00:00 UT   23 05 43.2   -02 27 34     3.611    3.307   64.4   15.5    66   28.1 
2026-01-04 00:00 UT   23 06 20.8   -02 24 46     3.621    3.301   63.5   15.5    66   28.1 
2026-01-05 00:00 UT   23 06 59.0   -02 21 53     3.630    3.296   62.6   15.4    66   28.1 
2026-01-06 00:00 UT   23 07 38.0   -02 18 54     3.639    3.290   61.8   15.3    66   28.1 
2026-01-07 00:00 UT   23 08 17.7   -02 15 51     3.648    3.284   60.9   15.2    65   28.1 
2026-01-08 00:00 UT   23 08 58.0   -02 12 42     3.656    3.279   60.1   15.1    65   28.1 
2026-01-09 00:00 UT   23 09 39.1   -02 09 27     3.665    3.273   59.3   15.0    65   28.1 
2026-01-10 00:00 UT   23 10 20.9   -02 06 08     3.673    3.268   58.4   14.9    65   28.1 
2026-01-11 00:00 UT   23 11 03.3   -02 02 43     3.682    3.262   57.6   14.7    65   28.1 
2026-01-12 00:00 UT   23 11 46.4   -01 59 14     3.690    3.256   56.8   14.6    65   28.1 
2026-01-13 00:00 UT   23 12 30.1   -01 55 39     3.698    3.250   55.9   14.5    65   28.1 
2026-01-14 00:00 UT   23 13 14.5   -01 51 60     3.705    3.245   55.1   14.4    65   28.1 
2026-01-15 00:00 UT   23 13 59.5   -01 48 15     3.713    3.239   54.3   14.3    65   28.1 
2026-01-16 00:00 UT   23 14 45.1   -01 44 26     3.720    3.233   53.5   14.2    65   28.1 

    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.