2003 WP21
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	8 Nov 2025	28.1	3.932 AU	3.727 AU	21h35m	-18°37'	94.5°	14.5°

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 2003 WP21 are:

            e (Eccentricity)                : 0.7811049
            a (Semimajor axis)              : 2.2701773
            i (Inclination)                 : 4.30834
            Ω (Longitude of ascending node) : 37.10086
            ω (Argument of perihelion)      : 124.67302
            M (Mean anomaly)                : 147.70400
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : -18.15023
            B (Latitude of perihelion)      : 3.54215
            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
2025-11-08 00:00 UT   21 35 06.9   -18 37 38     3.727    3.932   94.5   14.5    71   28.1 
2025-11-08 02:51 UT   21 35 08.1   -18 37 23     3.729    3.932   94.4   14.6    71   28.1 
2025-11-09 00:00 UT   21 35 17.9   -18 35 29     3.745    3.934   93.6   14.6    71   28.2 
2025-11-10 00:00 UT   21 35 29.9   -18 33 17     3.763    3.936   92.6   14.6    71   28.2 
2025-11-11 00:00 UT   21 35 42.8   -18 31 01     3.781    3.937   91.7   14.6    71   28.2 
2025-11-12 00:00 UT   21 35 56.7   -18 28 40     3.799    3.939   90.8   14.6    71   28.2 
2025-11-13 00:00 UT   21 36 11.5   -18 26 16     3.817    3.941   89.8   14.5    71   28.2 
2025-11-14 00:00 UT   21 36 27.2   -18 23 48     3.835    3.942   88.9   14.5    71   28.2 
2025-11-15 00:00 UT   21 36 43.8   -18 21 15     3.853    3.944   88.0   14.5    71   28.2 
2025-11-16 00:00 UT   21 37 01.3   -18 18 40     3.871    3.946   87.0   14.5    71   28.2 
2025-11-17 00:00 UT   21 37 19.8   -18 15 60     3.889    3.948   86.1   14.5    71   28.2 
2025-11-18 00:00 UT   21 37 39.0   -18 13 17     3.907    3.949   85.2   14.4    71   28.3 
2025-11-19 00:00 UT   21 37 59.2   -18 10 30     3.925    3.951   84.3   14.4    71   28.3 
2025-11-20 00:00 UT   21 38 20.1   -18 07 39     3.943    3.952   83.4   14.4    71   28.3 
2025-11-21 00:00 UT   21 38 41.9   -18 04 45     3.960    3.954   82.5   14.3    72   28.3 
2025-11-22 00:00 UT   21 39 04.6   -18 01 47     3.978    3.956   81.6   14.3    72   28.3 
2025-11-23 00:00 UT   21 39 28.0   -17 58 46     3.996    3.957   80.7   14.3    72   28.3 
2025-11-24 00:00 UT   21 39 52.2   -17 55 42     4.013    3.959   79.8   14.2    72   28.3 
2025-11-25 00:00 UT   21 40 17.2   -17 52 34     4.031    3.960   78.9   14.2    72   28.3 
2025-11-26 00:00 UT   21 40 43.0   -17 49 23     4.048    3.962   78.0   14.1    72   28.3 
2025-11-27 00:00 UT   21 41 09.5   -17 46 09     4.066    3.963   77.1   14.0    72   28.3 
2025-11-28 00:00 UT   21 41 36.8   -17 42 51     4.083    3.965   76.2   14.0    72   28.3 
2025-11-29 00:00 UT   21 42 04.7   -17 39 31     4.100    3.966   75.3   13.9    72   28.4 
2025-11-30 00:00 UT   21 42 33.4   -17 36 07     4.118    3.968   74.4   13.9    72   28.4 
2025-12-01 00:00 UT   21 43 02.8   -17 32 40     4.135    3.969   73.5   13.8    72   28.4 
2025-12-02 00:00 UT   21 43 32.9   -17 29 10     4.152    3.971   72.6   13.7    72   28.4 
2025-12-03 00:00 UT   21 44 03.6   -17 25 38     4.169    3.972   71.8   13.6    72   28.4 
2025-12-04 00:00 UT   21 44 35.0   -17 22 02     4.186    3.974   70.9   13.6    72   28.4 
2025-12-05 00:00 UT   21 45 07.0   -17 18 23     4.202    3.975   70.0   13.5    72   28.4 
2025-12-06 00:00 UT   21 45 39.7   -17 14 42     4.219    3.976   69.2   13.4    72   28.4 
2025-12-07 00:00 UT   21 46 13.0   -17 10 58     4.236    3.978   68.3   13.3    72   28.4 
2025-12-08 00:00 UT   21 46 46.9   -17 07 11     4.252    3.979   67.4   13.2    72   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.