2019 WH4
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	9 Mar 2026	34.2	3.976 AU	4.266 AU	18h49m	-21°33'	66.5°	13.2°

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
2026-03-09 00:00 UT   18 49 41.9   -21 33 19     4.266    3.976   66.5   13.2   266   34.2 
2026-03-09 15:15 UT   18 50 09.5   -21 32 26     4.256    3.975   67.0   13.3   266   34.2 
2026-03-10 00:00 UT   18 50 25.3   -21 31 55     4.250    3.975   67.3   13.3   266   34.2 
2026-03-11 00:00 UT   18 51 08.0   -21 30 30     4.235    3.974   68.2   13.4   266   34.2 
2026-03-12 00:00 UT   18 51 50.1   -21 29 06     4.219    3.973   69.0   13.5   265   34.2 
2026-03-13 00:00 UT   18 52 31.5   -21 27 41     4.203    3.972   69.8   13.6   265   34.2 
2026-03-14 00:00 UT   18 53 12.3   -21 26 15     4.187    3.970   70.7   13.7   265   34.2 
2026-03-15 00:00 UT   18 53 52.3   -21 24 50     4.171    3.969   71.5   13.7   265   34.2 
2026-03-16 00:00 UT   18 54 31.7   -21 23 25     4.154    3.968   72.4   13.8   265   34.2 
2026-03-17 00:00 UT   18 55 10.4   -21 21 59     4.138    3.967   73.2   13.9   265   34.2 
2026-03-18 00:00 UT   18 55 48.3   -21 20 34     4.122    3.966   74.1   14.0   265   34.2 
2026-03-19 00:00 UT   18 56 25.6   -21 19 08     4.105    3.964   74.9   14.0   265   34.2 
2026-03-20 00:00 UT   18 57 02.1   -21 17 43     4.089    3.963   75.8   14.1   265   34.1 
2026-03-21 00:00 UT   18 57 37.8   -21 16 18     4.072    3.962   76.6   14.2   265   34.1 
2026-03-22 00:00 UT   18 58 12.8   -21 14 53     4.056    3.961   77.5   14.2   265   34.1 
2026-03-23 00:00 UT   18 58 47.0   -21 13 28     4.039    3.960   78.3   14.3   265   34.1 
2026-03-24 00:00 UT   18 59 20.5   -21 12 04     4.022    3.958   79.2   14.3   264   34.1 
2026-03-25 00:00 UT   18 59 53.1   -21 10 40     4.006    3.957   80.0   14.4   264   34.1 
2026-03-26 00:00 UT   19 00 25.0   -21 09 16     3.989    3.956   80.9   14.4   264   34.1 
2026-03-27 00:00 UT   19 00 56.0   -21 07 53     3.972    3.954   81.8   14.5   264   34.1 
2026-03-28 00:00 UT   19 01 26.2   -21 06 30     3.955    3.953   82.7   14.5   264   34.1 
2026-03-29 00:00 UT   19 01 55.6   -21 05 08     3.938    3.952   83.5   14.5   264   34.1 
2026-03-30 00:00 UT   19 02 24.2   -21 03 46     3.921    3.950   84.4   14.6   264   34.1 
2026-03-31 00:00 UT   19 02 51.9   -21 02 25     3.904    3.949   85.3   14.6   264   34.1 
2026-04-01 00:00 UT   19 03 18.7   -21 01 05     3.887    3.948   86.2   14.6   264   34.1 
2026-04-02 00:00 UT   19 03 44.7   -20 59 45     3.870    3.946   87.0   14.6   264   34.0 
2026-04-03 00:00 UT   19 04 09.9   -20 58 26     3.853    3.945   87.9   14.7   264   34.0 
2026-04-04 00:00 UT   19 04 34.1   -20 57 07     3.836    3.944   88.8   14.7   264   34.0 
2026-04-05 00:00 UT   19 04 57.4   -20 55 50     3.818    3.942   89.7   14.7   264   34.0 
2026-04-06 00:00 UT   19 05 19.8   -20 54 33     3.801    3.941   90.6   14.7   264   34.0 
2026-04-07 00:00 UT   19 05 41.3   -20 53 17     3.784    3.939   91.5   14.7   263   34.0 
2026-04-08 00:00 UT   19 06 01.9   -20 52 03     3.767    3.938   92.4   14.7   263   34.0 

    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.