2003 WP21
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	14 Apr 2026	28.7	4.036 AU	4.846 AU	23h32m	-06°05'	32.5°	7.7°

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 2003 WP21 are:

            e (Eccentricity)                : 0.7811031
            a (Semimajor axis)              : 2.2701766
            i (Inclination)                 : 4.30825
            Ω (Longitude of ascending node) : 37.10088
            ω (Argument of perihelion)      : 124.67263
            M (Mean anomaly)                : 147.70422
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : -18.15060
            B (Latitude of perihelion)      : 3.54209
            P (Orbital period in years)     : 3.42            
        

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
2026-04-14 00:00 UT   23 32 40.8   -06 05 27     4.846    4.036   32.5    7.7   242   28.7 
2026-04-14 17:18 UT   23 33 16.2   -06 01 48     4.840    4.036   33.0    7.8   242   28.7 
2026-04-15 00:00 UT   23 33 29.9   -06 00 23     4.837    4.036   33.2    7.8   242   28.7 
2026-04-16 00:00 UT   23 34 18.8   -05 55 21     4.828    4.035   34.0    8.0   242   28.7 
2026-04-17 00:00 UT   23 35 07.4   -05 50 20     4.819    4.035   34.8    8.2   243   28.7 
2026-04-18 00:00 UT   23 35 55.8   -05 45 22     4.809    4.034   35.5    8.3   243   28.7 
2026-04-19 00:00 UT   23 36 43.9   -05 40 25     4.799    4.034   36.3    8.5   243   28.7 
2026-04-20 00:00 UT   23 37 31.8   -05 35 30     4.789    4.033   37.0    8.6   243   28.7 
2026-04-21 00:00 UT   23 38 19.4   -05 30 37     4.779    4.033   37.8    8.8   243   28.7 
2026-04-22 00:00 UT   23 39 06.7   -05 25 46     4.769    4.032   38.6    8.9   243   28.7 
2026-04-23 00:00 UT   23 39 53.7   -05 20 58     4.759    4.032   39.3    9.1   243   28.7 
2026-04-24 00:00 UT   23 40 40.5   -05 16 11     4.748    4.031   40.1    9.2   243   28.7 
2026-04-25 00:00 UT   23 41 27.0   -05 11 27     4.737    4.030   40.8    9.4   243   28.7 
2026-04-26 00:00 UT   23 42 13.2   -05 06 44     4.726    4.030   41.6    9.5   243   28.7 
2026-04-27 00:00 UT   23 42 59.1   -05 02 04     4.715    4.029   42.4    9.7   243   28.7 
2026-04-28 00:00 UT   23 43 44.7   -04 57 27     4.704    4.028   43.1    9.8   243   28.7 
2026-04-29 00:00 UT   23 44 30.0   -04 52 51     4.692    4.028   43.9   10.0   244   28.7 
2026-04-30 00:00 UT   23 45 15.0   -04 48 18     4.681    4.027   44.7   10.1   244   28.7 
2026-05-01 00:00 UT   23 45 59.6   -04 43 48     4.669    4.026   45.4   10.3   244   28.7 
2026-05-02 00:00 UT   23 46 44.0   -04 39 19     4.657    4.026   46.2   10.4   244   28.7 
2026-05-03 00:00 UT   23 47 28.0   -04 34 54     4.645    4.025   47.0   10.6   244   28.7 
2026-05-04 00:00 UT   23 48 11.7   -04 30 30     4.632    4.024   47.8   10.7   244   28.7 
2026-05-05 00:00 UT   23 48 55.0   -04 26 10     4.620    4.024   48.5   10.8   244   28.7 
2026-05-06 00:00 UT   23 49 38.0   -04 21 51     4.607    4.023   49.3   11.0   244   28.7 
2026-05-07 00:00 UT   23 50 20.6   -04 17 36     4.594    4.022   50.1   11.1   244   28.7 
2026-05-08 00:00 UT   23 51 02.9   -04 13 23     4.581    4.021   50.9   11.2   244   28.7 
2026-05-09 00:00 UT   23 51 44.8   -04 09 13     4.568    4.020   51.6   11.4   244   28.7 
2026-05-10 00:00 UT   23 52 26.4   -04 05 06     4.555    4.020   52.4   11.5   244   28.7 
2026-05-11 00:00 UT   23 53 07.6   -04 01 02     4.542    4.019   53.2   11.6   244   28.7 
2026-05-12 00:00 UT   23 53 48.3   -03 57 01     4.528    4.018   54.0   11.7   244   28.7 
2026-05-13 00:00 UT   23 54 28.7   -03 53 02     4.514    4.017   54.8   11.9   244   28.7 
2026-05-14 00:00 UT   23 55 08.7   -03 49 07     4.501    4.016   55.5   12.0   244   28.7 

    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.