2019 WH4
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	7 Jul 2026	32.6	3.762 AU	2.754 AU	18h25m	-20°33'	170.9°	2.5°

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 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
2026-07-07 00:00 UT   18 25 00.7   -20 33 29     2.754    3.762  170.9    2.5   105   32.6 
2026-07-07 22:51 UT   18 24 04.6   -20 33 47     2.754    3.759  169.8    2.7   103   32.7 
2026-07-08 00:00 UT   18 24 01.8   -20 33 48     2.754    3.759  169.7    2.8   103   32.7 
2026-07-09 00:00 UT   18 23 03.2   -20 34 08     2.755    3.757  168.6    3.1   102   32.7 
2026-07-10 00:00 UT   18 22 04.9   -20 34 27     2.755    3.754  167.5    3.4   100   32.7 
2026-07-11 00:00 UT   18 21 06.9   -20 34 46     2.756    3.752  166.3    3.7    99   32.7 
2026-07-12 00:00 UT   18 20 09.2   -20 35 04     2.757    3.749  165.1    4.0    98   32.7 
2026-07-13 00:00 UT   18 19 12.1   -20 35 22     2.759    3.747  164.0    4.3    98   32.8 
2026-07-14 00:00 UT   18 18 15.3   -20 35 39     2.761    3.744  162.8    4.6    97   32.8 
2026-07-15 00:00 UT   18 17 19.1   -20 35 56     2.763    3.741  161.7    4.9    97   32.8 
2026-07-16 00:00 UT   18 16 23.5   -20 36 13     2.765    3.739  160.5    5.2    96   32.8 
2026-07-17 00:00 UT   18 15 28.5   -20 36 30     2.768    3.736  159.4    5.5    96   32.8 
2026-07-18 00:00 UT   18 14 34.1   -20 36 46     2.771    3.734  158.2    5.8    96   32.8 
2026-07-19 00:00 UT   18 13 40.3   -20 37 01     2.774    3.731  157.0    6.1    95   32.9 
2026-07-20 00:00 UT   18 12 47.3   -20 37 17     2.778    3.728  155.9    6.4    95   32.9 
2026-07-21 00:00 UT   18 11 55.1   -20 37 32     2.781    3.726  154.7    6.7    95   32.9 
2026-07-22 00:00 UT   18 11 03.6   -20 37 46     2.786    3.723  153.6    7.0    95   32.9 
2026-07-23 00:00 UT   18 10 12.9   -20 38 01     2.790    3.720  152.4    7.3    94   32.9 
2026-07-24 00:00 UT   18 09 23.1   -20 38 15     2.794    3.718  151.3    7.5    94   32.9 
2026-07-25 00:00 UT   18 08 34.2   -20 38 29     2.799    3.715  150.2    7.8    94   32.9 
2026-07-26 00:00 UT   18 07 46.1   -20 38 43     2.804    3.712  149.0    8.1    94   33.0 
2026-07-27 00:00 UT   18 06 59.0   -20 38 57     2.810    3.709  147.9    8.4    94   33.0 
2026-07-28 00:00 UT   18 06 12.9   -20 39 10     2.815    3.707  146.8    8.6    94   33.0 
2026-07-29 00:00 UT   18 05 27.7   -20 39 24     2.821    3.704  145.6    8.9    94   33.0 
2026-07-30 00:00 UT   18 04 43.6   -20 39 37     2.827    3.701  144.5    9.2    93   33.0 
2026-07-31 00:00 UT   18 04 00.4   -20 39 50     2.834    3.698  143.4    9.4    93   33.0 
2026-08-01 00:00 UT   18 03 18.4   -20 40 04     2.840    3.696  142.3    9.7    93   33.0 
2026-08-02 00:00 UT   18 02 37.4   -20 40 17     2.847    3.693  141.2    9.9    93   33.1 
2026-08-03 00:00 UT   18 01 57.5   -20 40 31     2.854    3.690  140.0   10.2    93   33.1 
2026-08-04 00:00 UT   18 01 18.7   -20 40 44     2.861    3.687  138.9   10.4    93   33.1 
2026-08-05 00:00 UT   18 00 41.1   -20 40 58     2.869    3.684  137.8   10.6    93   33.1 
2026-08-06 00:00 UT   18 00 04.6   -20 41 11     2.877    3.682  136.7   10.9    93   33.1 

    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.