2025 WK4
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	20 Sep 2026	29.8	2.002 AU	2.487 AU	14h59m	-16°36'	50.4°	22.7°

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 2025 WK4 are:

            e (Eccentricity)                : 0.3536924
            a (Semimajor axis)              : 1.5224688
            i (Inclination)                 : 5.27707
            Ω (Longitude of ascending node) : 245.13974
            ω (Argument of perihelion)      : 203.56692
            M (Mean anomaly)                : 89.79561
            Epoch                           : 2026 Jun 09

            L (Longitude of perihelion)     : 268.61760
            B (Latitude of perihelion)      : -2.10737
            P (Orbital period in years)     : 1.88            
        

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
2026-09-20 00:00 UT   14 59 01.5   -16 36 34     2.487    2.002   50.4   22.7   106   29.8 
2026-09-20 23:45 UT   15 00 57.4   -16 43 29     2.497    2.004   49.9   22.5   106   29.8 
2026-09-21 00:00 UT   15 00 58.6   -16 43 34     2.497    2.004   49.9   22.5   106   29.8 
2026-09-22 00:00 UT   15 02 56.0   -16 50 30     2.508    2.006   49.4   22.3   106   29.8 
2026-09-23 00:00 UT   15 04 53.5   -16 57 23     2.518    2.007   48.9   22.1   106   29.8 
2026-09-24 00:00 UT   15 06 51.3   -17 04 12     2.529    2.009   48.4   21.9   105   29.8 
2026-09-25 00:00 UT   15 08 49.3   -17 10 58     2.539    2.011   47.9   21.7   105   29.8 
2026-09-26 00:00 UT   15 10 47.5   -17 17 41     2.550    2.012   47.5   21.5   105   29.8 
2026-09-27 00:00 UT   15 12 45.9   -17 24 20     2.560    2.014   47.0   21.3   105   29.8 
2026-09-28 00:00 UT   15 14 44.6   -17 30 55     2.570    2.015   46.5   21.1   105   29.8 
2026-09-29 00:00 UT   15 16 43.4   -17 37 27     2.580    2.017   46.0   20.9   105   29.8 
2026-09-30 00:00 UT   15 18 42.5   -17 43 54     2.590    2.018   45.5   20.7   104   29.8 
2026-10-01 00:00 UT   15 20 41.8   -17 50 18     2.600    2.020   45.0   20.5   104   29.8 
2026-10-02 00:00 UT   15 22 41.4   -17 56 39     2.610    2.021   44.5   20.3   104   29.9 
2026-10-03 00:00 UT   15 24 41.2   -18 02 55     2.619    2.022   44.0   20.1   104   29.9 
2026-10-04 00:00 UT   15 26 41.1   -18 09 07     2.629    2.024   43.5   19.9   104   29.9 
2026-10-05 00:00 UT   15 28 41.4   -18 15 16     2.639    2.025   43.0   19.7   103   29.9 
2026-10-06 00:00 UT   15 30 41.8   -18 21 20     2.648    2.026   42.5   19.5   103   29.9 
2026-10-07 00:00 UT   15 32 42.5   -18 27 20     2.657    2.028   42.0   19.3   103   29.9 

    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.