2009 WU25
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	23 Oct 2025	31.1	3.202 AU	4.106 AU	12h36m	+00°03'	21.5°	6.5°

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 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
2025-10-23 00:00 UT   12 36 03.5   +00 03 22     4.106    3.202   21.5    6.5   302   31.1 
2025-10-23 16:48 UT   12 36 51.4   +00 01 41     4.105    3.205   22.0    6.7   302   31.1 
2025-10-24 00:00 UT   12 37 11.8   +00 03 51     4.105    3.206   22.2    6.7   302   31.1 
2025-10-25 00:00 UT   12 38 19.9   +00 11 00     4.103    3.210   22.9    6.9   302   31.1 
2025-10-26 00:00 UT   12 39 27.7   +00 18 07     4.101    3.214   23.6    7.1   301   31.1 
2025-10-27 00:00 UT   12 40 35.2   +00 25 11     4.098    3.218   24.2    7.3   301   31.1 
2025-10-28 00:00 UT   12 41 42.5   +00 32 13     4.096    3.222   24.9    7.5   301   31.1 
2025-10-29 00:00 UT   12 42 49.5   +00 39 11     4.093    3.226   25.6    7.6   301   31.2 
2025-10-30 00:00 UT   12 43 56.2   +00 46 07     4.091    3.230   26.3    7.8   300   31.2 
2025-10-31 00:00 UT   12 45 02.6   +00 53 00     4.088    3.235   27.0    8.0   300   31.2 
2025-11-01 00:00 UT   12 46 08.7   +00 59 51     4.084    3.239   27.7    8.2   300   31.2 
2025-11-02 00:00 UT   12 47 14.6   -01 06 38     4.081    3.243   28.4    8.4   300   31.2 
2025-11-03 00:00 UT   12 48 20.2   -01 13 23     4.077    3.247   29.1    8.5   300   31.2 
2025-11-04 00:00 UT   12 49 25.4   -01 20 05     4.074    3.251   29.8    8.7   299   31.2 
2025-11-05 00:00 UT   12 50 30.4   -01 26 43     4.070    3.255   30.5    8.9   299   31.2 
2025-11-06 00:00 UT   12 51 35.1   -01 33 19     4.066    3.259   31.2    9.1   299   31.2 
2025-11-07 00:00 UT   12 52 39.4   -01 39 52     4.061    3.263   31.9    9.2   299   31.2 
2025-11-08 00:00 UT   12 53 43.5   -01 46 22     4.057    3.266   32.6    9.4   299   31.2 
2025-11-09 00:00 UT   12 54 47.2   -01 52 48     4.052    3.270   33.3    9.6   298   31.2 
2025-11-10 00:00 UT   12 55 50.6   -01 59 12     4.048    3.274   34.0    9.7   298   31.2 
2025-11-11 00:00 UT   12 56 53.7   -02 05 32     4.043    3.278   34.8    9.9   298   31.3 
2025-11-12 00:00 UT   12 57 56.5   -02 11 50     4.037    3.282   35.5   10.1   298   31.3 
2025-11-13 00:00 UT   12 58 58.9   -02 18 04     4.032    3.286   36.2   10.2   298   31.3 
2025-11-14 00:00 UT   13 00 01.0   -02 24 14     4.027    3.290   36.9   10.4   298   31.3 
2025-11-15 00:00 UT   13 01 02.7   -02 30 22     4.021    3.294   37.6   10.6   297   31.3 
2025-11-16 00:00 UT   13 02 04.1   -02 36 26     4.015    3.297   38.4   10.7   297   31.3 
2025-11-17 00:00 UT   13 03 05.1   -02 42 27     4.009    3.301   39.1   10.9   297   31.3 
2025-11-18 00:00 UT   13 04 05.7   -02 48 24     4.003    3.305   39.8   11.0   297   31.3 
2025-11-19 00:00 UT   13 05 06.0   -02 54 17     3.996    3.309   40.6   11.2   297   31.3 
2025-11-20 00:00 UT   13 06 05.9   -03 00 08     3.990    3.313   41.3   11.4   297   31.3 
2025-11-21 00:00 UT   13 07 05.3   -03 05 54     3.983    3.316   42.1   11.5   297   31.3 

    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.