2003 WP21
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	28 May 2026	28.6	4.003 AU	4.293 AU	00h03m	-03°00'	66.7°	13.4°

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
2026-05-28 00:00 UT   00 03 41.7   -03 00 04     4.293    4.003   66.7   13.4   245   28.6 
2026-05-28 17:45 UT   00 04 06.1   -02 57 48     4.282    4.002   67.3   13.5   245   28.6 
2026-05-29 00:00 UT   00 04 14.7   -02 57 00     4.278    4.001   67.5   13.5   245   28.6 
2026-05-30 00:00 UT   00 04 47.2   -02 54 01     4.262    4.000   68.3   13.6   245   28.6 
2026-05-31 00:00 UT   00 05 19.1   -02 51 06     4.246    3.999   69.2   13.7   245   28.6 
2026-06-01 00:00 UT   00 05 50.5   -02 48 14     4.230    3.998   70.0   13.8   245   28.6 
2026-06-02 00:00 UT   00 06 21.3   -02 45 27     4.214    3.997   70.8   13.9   245   28.6 
2026-06-03 00:00 UT   00 06 51.6   -02 42 44     4.198    3.996   71.6   13.9   245   28.6 
2026-06-04 00:00 UT   00 07 21.4   -02 40 05     4.182    3.995   72.4   14.0   246   28.6 
2026-06-05 00:00 UT   00 07 50.5   -02 37 30     4.165    3.993   73.3   14.1   246   28.6 
2026-06-06 00:00 UT   00 08 19.1   -02 34 59     4.149    3.992   74.1   14.1   246   28.5 
2026-06-07 00:00 UT   00 08 47.0   -02 32 33     4.133    3.991   74.9   14.2   246   28.5 
2026-06-08 00:00 UT   00 09 14.4   -02 30 11     4.116    3.990   75.8   14.3   246   28.5 
2026-06-09 00:00 UT   00 09 41.1   -02 27 54     4.099    3.989   76.6   14.3   246   28.5 
2026-06-10 00:00 UT   00 10 07.2   -02 25 41     4.083    3.987   77.5   14.4   246   28.5 
2026-06-11 00:00 UT   00 10 32.7   -02 23 33     4.066    3.986   78.3   14.4   246   28.5 
2026-06-12 00:00 UT   00 10 57.5   -02 21 29     4.049    3.985   79.1   14.5   246   28.5 
2026-06-13 00:00 UT   00 11 21.7   -02 19 30     4.032    3.983   80.0   14.5   246   28.5 
2026-06-14 00:00 UT   00 11 45.1   -02 17 36     4.015    3.982   80.8   14.6   246   28.5 
2026-06-15 00:00 UT   00 12 08.0   -02 15 47     3.998    3.981   81.7   14.6   246   28.5 
2026-06-16 00:00 UT   00 12 30.1   -02 14 03     3.981    3.979   82.6   14.7   246   28.5 
2026-06-17 00:00 UT   00 12 51.5   -02 12 24     3.964    3.978   83.4   14.7   246   28.5 
2026-06-18 00:00 UT   00 13 12.2   -02 10 50     3.947    3.977   84.3   14.7   246   28.5 
2026-06-19 00:00 UT   00 13 32.1   -02 09 21     3.930    3.975   85.1   14.8   246   28.4 
2026-06-20 00:00 UT   00 13 51.4   -02 07 58     3.913    3.974   86.0   14.8   246   28.4 
2026-06-21 00:00 UT   00 14 09.9   -02 06 39     3.896    3.972   86.9   14.8   246   28.4 
2026-06-22 00:00 UT   00 14 27.6   -02 05 26     3.879    3.971   87.8   14.8   246   28.4 
2026-06-23 00:00 UT   00 14 44.6   -02 04 18     3.861    3.970   88.7   14.8   246   28.4 
2026-06-24 00:00 UT   00 15 00.8   -02 03 16     3.844    3.968   89.5   14.8   247   28.4 
2026-06-25 00:00 UT   00 15 16.2   -02 02 19     3.827    3.967   90.4   14.8   247   28.4 
2026-06-26 00:00 UT   00 15 30.8   -02 01 27     3.810    3.965   91.3   14.8   247   28.4 
2026-06-27 00:00 UT   00 15 44.7   -02 00 41     3.792    3.964   92.2   14.8   247   28.4 

    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.