2019 WH4
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	7 Jun 2026	33.0	3.831 AU	2.897 AU	18h52m	-20°22'	153.4°	6.8°

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
2026-06-07 00:00 UT   18 52 56.6   -20 22 47     2.897    3.831  153.4    6.8   260   33.0 
2026-06-07 19:50 UT   18 52 17.5   -20 23 01     2.889    3.829  154.3    6.6   260   33.0 
2026-06-08 00:00 UT   18 52 09.3   -20 23 04     2.888    3.829  154.5    6.5   260   33.0 
2026-06-09 00:00 UT   18 51 21.0   -20 23 21     2.879    3.827  155.7    6.3   259   33.0 
2026-06-10 00:00 UT   18 50 31.9   -20 23 39     2.870    3.825  156.8    6.0   259   33.0 
2026-06-11 00:00 UT   18 49 41.9   -20 23 57     2.862    3.822  158.0    5.7   259   33.0 
2026-06-12 00:00 UT   18 48 51.1   -20 24 17     2.854    3.820  159.1    5.4   258   32.9 
2026-06-13 00:00 UT   18 47 59.5   -20 24 37     2.847    3.818  160.3    5.2   258   32.9 
2026-06-14 00:00 UT   18 47 07.2   -20 24 57     2.839    3.816  161.4    4.9   258   32.9 
2026-06-15 00:00 UT   18 46 14.1   -20 25 18     2.832    3.814  162.5    4.6   257   32.9 
2026-06-16 00:00 UT   18 45 20.3   -20 25 40     2.826    3.811  163.7    4.3   257   32.8 
2026-06-17 00:00 UT   18 44 25.9   -20 26 02     2.819    3.809  164.8    4.0   256   32.8 
2026-06-18 00:00 UT   18 43 30.8   -20 26 24     2.813    3.807  166.0    3.7   255   32.8 
2026-06-19 00:00 UT   18 42 35.2   -20 26 47     2.807    3.805  167.1    3.4   254   32.8 
2026-06-20 00:00 UT   18 41 39.0   -20 27 10     2.802    3.802  168.3    3.1   253   32.8 
2026-06-21 00:00 UT   18 40 42.3   -20 27 33     2.797    3.800  169.4    2.8   252   32.7 
2026-06-22 00:00 UT   18 39 45.2   -20 27 56     2.792    3.798  170.6    2.5   250   32.7 
2026-06-23 00:00 UT   18 38 47.6   -20 28 19     2.787    3.795  171.7    2.2   248   32.7 
2026-06-24 00:00 UT   18 37 49.7   -20 28 43     2.783    3.793  172.8    1.9   245   32.6 
2026-06-25 00:00 UT   18 36 51.4   -20 29 06     2.779    3.791  173.9    1.6   241   32.6 
2026-06-26 00:00 UT   18 35 52.8   -20 29 29     2.775    3.788  174.9    1.4   235   32.6 
2026-06-27 00:00 UT   18 34 54.0   -20 29 52     2.771    3.786  175.9    1.1   226   32.6 
2026-06-28 00:00 UT   18 33 54.9   -20 30 15     2.768    3.784  176.7    0.9   213   32.5 
2026-06-29 00:00 UT   18 32 55.7   -20 30 38     2.766    3.781  177.2    0.8   193   32.5 
2026-06-30 00:00 UT   18 31 56.4   -20 31 00     2.763    3.779  177.3    0.7   168   32.5 
2026-07-01 00:00 UT   18 30 56.9   -20 31 22     2.761    3.776  176.9    0.8   147   32.5 
2026-07-02 00:00 UT   18 29 57.4   -20 31 44     2.759    3.774  176.1    1.0   131   32.5 
2026-07-03 00:00 UT   18 28 57.9   -20 32 06     2.758    3.772  175.2    1.3   122   32.6 
2026-07-04 00:00 UT   18 27 58.5   -20 32 27     2.756    3.769  174.2    1.6   115   32.6 
2026-07-05 00:00 UT   18 26 59.1   -20 32 48     2.755    3.767  173.1    1.9   111   32.6 
2026-07-06 00:00 UT   18 25 59.8   -20 33 08     2.755    3.764  172.0    2.2   107   32.6 
2026-07-07 00:00 UT   18 25 00.7   -20 33 29     2.754    3.762  170.9    2.5   105   32.6 

    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.