2019 WH4
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	6 Aug 2026	33.1	3.682 AU	2.877 AU	18h00m	-20°41'	136.7°	10.9°

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 2019 WH4 are:

            e (Eccentricity)                : 0.6049320
            a (Semimajor axis)              : 2.5112688
            i (Inclination)                 : 3.53214
            Ω (Longitude of ascending node) : 243.40932
            ω (Argument of perihelion)      : 197.27505
            M (Mean anomaly)                : 177.81977
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 260.65350
            B (Latitude of perihelion)      : -1.04830
            P (Orbital period in years)     : 3.98            
        

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
2026-08-06 00:00 UT   18 00 04.6   -20 41 11     2.877    3.682  136.7   10.9    93   33.1 
2026-08-06 23:27 UT   17 59 30.0   -20 41 25     2.884    3.679  135.7   11.1    93   33.1 
2026-08-07 00:00 UT   17 59 29.3   -20 41 25     2.885    3.679  135.6   11.1    93   33.1 
2026-08-08 00:00 UT   17 58 55.1   -20 41 39     2.893    3.676  134.6   11.3    93   33.1 
2026-08-09 00:00 UT   17 58 22.2   -20 41 54     2.901    3.673  133.5   11.6    93   33.1 
2026-08-10 00:00 UT   17 57 50.5   -20 42 08     2.909    3.670  132.4   11.8    93   33.2 
2026-08-11 00:00 UT   17 57 20.0   -20 42 23     2.918    3.667  131.3   12.0    93   33.2 
2026-08-12 00:00 UT   17 56 50.8   -20 42 39     2.927    3.664  130.2   12.2    93   33.2 
2026-08-13 00:00 UT   17 56 22.8   -20 42 54     2.936    3.661  129.2   12.4    93   33.2 
2026-08-14 00:00 UT   17 55 56.1   -20 43 10     2.945    3.658  128.1   12.6    93   33.2 
2026-08-15 00:00 UT   17 55 30.7   -20 43 26     2.954    3.655  127.1   12.8    92   33.2 
2026-08-16 00:00 UT   17 55 06.5   -20 43 43     2.964    3.652  126.0   13.0    92   33.2 
2026-08-17 00:00 UT   17 54 43.7   -20 43 60     2.974    3.649  125.0   13.1    92   33.2 
2026-08-18 00:00 UT   17 54 22.1   -20 44 17     2.983    3.646  123.9   13.3    92   33.3 
2026-08-19 00:00 UT   17 54 01.9   -20 44 35     2.993    3.643  122.9   13.5    92   33.3 
2026-08-20 00:00 UT   17 53 42.9   -20 44 53     3.004    3.640  121.8   13.7    92   33.3 
2026-08-21 00:00 UT   17 53 25.3   -20 45 11     3.014    3.637  120.8   13.8    92   33.3 
2026-08-22 00:00 UT   17 53 08.9   -20 45 30     3.024    3.634  119.8   14.0    92   33.3 
2026-08-23 00:00 UT   17 52 53.9   -20 45 49     3.035    3.631  118.8   14.1    92   33.3 
2026-08-24 00:00 UT   17 52 40.1   -20 46 09     3.045    3.628  117.8   14.3    92   33.3 
2026-08-25 00:00 UT   17 52 27.7   -20 46 29     3.056    3.625  116.7   14.4    92   33.3 
2026-08-26 00:00 UT   17 52 16.5   -20 46 50     3.067    3.622  115.7   14.6    92   33.3 
2026-08-27 00:00 UT   17 52 06.7   -20 47 11     3.078    3.619  114.7   14.7    92   33.4 
2026-08-28 00:00 UT   17 51 58.1   -20 47 32     3.089    3.616  113.7   14.8    92   33.4 
2026-08-29 00:00 UT   17 51 50.8   -20 47 54     3.100    3.613  112.7   14.9    92   33.4 
2026-08-30 00:00 UT   17 51 44.8   -20 48 16     3.111    3.609  111.8   15.1    92   33.4 
2026-08-31 00:00 UT   17 51 40.1   -20 48 39     3.123    3.606  110.8   15.2    92   33.4 
2026-09-01 00:00 UT   17 51 36.6   -20 49 02     3.134    3.603  109.8   15.3    92   33.4 
2026-09-02 00:00 UT   17 51 34.5   -20 49 25     3.145    3.600  108.8   15.4    92   33.4 
2026-09-03 00:00 UT   17 51 33.5   -20 49 49     3.157    3.597  107.8   15.5    92   33.4 
2026-09-04 00:00 UT   17 51 33.9   -20 50 13     3.169    3.593  106.9   15.6    92   33.4 
2026-09-05 00:00 UT   17 51 35.4   -20 50 37     3.180    3.590  105.9   15.7    92   33.4 

    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.