2009 WU25
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	22 Dec 2025	31.4	3.426 AU	3.700 AU	13h33m	-05°31'	66.3°	15.2°

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 2009 WU25 are:

            e (Eccentricity)                : 0.5981225
            a (Semimajor axis)              : 2.4094719
            i (Inclination)                 : 5.43263
            Ω (Longitude of ascending node) : 60.58097
            ω (Argument of perihelion)      : 331.33807
            M (Mean anomaly)                : 102.36092
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 32.02747
            B (Latitude of perihelion)      : -2.60270
            P (Orbital period in years)     : 3.74            
        

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
2025-12-22 00:00 UT   13 33 52.5   -05 31 40     3.700    3.426   66.3   15.2   293   31.4 
2025-12-22 17:43 UT   13 34 24.1   -05 34 16     3.692    3.428   66.9   15.3   293   31.4 
2025-12-23 00:00 UT   13 34 35.2   -05 35 11     3.689    3.429   67.1   15.3   293   31.4 
2025-12-24 00:00 UT   13 35 17.2   -05 38 36     3.678    3.432   68.0   15.4   293   31.4 
2025-12-25 00:00 UT   13 35 58.5   -05 41 56     3.666    3.435   68.8   15.5   293   31.4 
2025-12-26 00:00 UT   13 36 39.1   -05 45 12     3.655    3.439   69.7   15.6   293   31.3 
2025-12-27 00:00 UT   13 37 19.0   -05 48 22     3.643    3.442   70.5   15.6   293   31.3 
2025-12-28 00:00 UT   13 37 58.1   -05 51 27     3.631    3.445   71.3   15.7   293   31.3 
2025-12-29 00:00 UT   13 38 36.5   -05 54 27     3.619    3.448   72.2   15.8   293   31.3 
2025-12-30 00:00 UT   13 39 14.2   -05 57 21     3.608    3.452   73.0   15.8   292   31.3 
2025-12-31 00:00 UT   13 39 51.1   -06 00 11     3.596    3.455   73.9   15.9   292   31.3 
2026-01-01 00:00 UT   13 40 27.2   -06 02 55     3.584    3.458   74.8   15.9   292   31.3 
2026-01-02 00:00 UT   13 41 02.6   -06 05 34     3.571    3.461   75.6   16.0   292   31.3 
2026-01-03 00:00 UT   13 41 37.2   -06 08 07     3.559    3.464   76.5   16.0   292   31.3 
2026-01-04 00:00 UT   13 42 10.9   -06 10 35     3.547    3.467   77.4   16.1   292   31.3 
2026-01-05 00:00 UT   13 42 43.9   -06 12 58     3.535    3.470   78.2   16.1   292   31.3 
2026-01-06 00:00 UT   13 43 16.0   -06 15 15     3.522    3.474   79.1   16.1   292   31.3 
2026-01-07 00:00 UT   13 43 47.3   -06 17 27     3.510    3.477   80.0   16.2   292   31.3 
2026-01-08 00:00 UT   13 44 17.7   -06 19 33     3.497    3.480   80.9   16.2   292   31.3 
2026-01-09 00:00 UT   13 44 47.3   -06 21 33     3.485    3.483   81.8   16.2   292   31.3 
2026-01-10 00:00 UT   13 45 16.0   -06 23 28     3.472    3.486   82.7   16.2   291   31.3 
2026-01-11 00:00 UT   13 45 43.8   -06 25 17     3.459    3.489   83.6   16.3   291   31.3 
2026-01-12 00:00 UT   13 46 10.7   -06 26 60     3.447    3.492   84.5   16.3   291   31.3 
2026-01-13 00:00 UT   13 46 36.7   -06 28 37     3.434    3.495   85.4   16.3   291   31.3 
2026-01-14 00:00 UT   13 47 01.8   -06 30 09     3.421    3.498   86.3   16.3   291   31.3 
2026-01-15 00:00 UT   13 47 25.9   -06 31 34     3.408    3.501   87.2   16.3   291   31.3 
2026-01-16 00:00 UT   13 47 49.1   -06 32 54     3.395    3.504   88.1   16.3   291   31.3 
2026-01-17 00:00 UT   13 48 11.3   -06 34 07     3.382    3.507   89.0   16.3   291   31.2 
2026-01-18 00:00 UT   13 48 32.5   -06 35 15     3.370    3.510   90.0   16.3   291   31.2 
2026-01-19 00:00 UT   13 48 52.8   -06 36 16     3.357    3.513   90.9   16.3   291   31.2 
2026-01-20 00:00 UT   13 49 12.0   -06 37 12     3.344    3.516   91.8   16.2   291   31.2 
2026-01-21 00:00 UT   13 49 30.2   -06 38 01     3.331    3.519   92.8   16.2   291   31.2 

    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.