2026 HA4
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	13 Oct 2026	28.0	1.729 AU	0.808 AU	23h06m	-05°38'	146.2°	18.8°

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 2026 HA4 are:

            e (Eccentricity)                : 0.5047418
            a (Semimajor axis)              : 1.9569982
            i (Inclination)                 : 0.61679
            Ω (Longitude of ascending node) : 0.04865
            ω (Argument of perihelion)      : 256.11939
            M (Mean anomaly)                : 3.14426
            Epoch                           : 2026 Jun 09

            L (Longitude of perihelion)     : 76.16727
            B (Latitude of perihelion)      : -0.59878
            P (Orbital period in years)     : 2.74            
        

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
2026-10-13 00:00 UT   23 06 19.9   -05 38 20     0.808    1.729  146.2   18.8    67   28.0 
2026-10-13 22:15 UT   23 06 11.7   -05 38 43     0.820    1.735  145.2   19.2    67   28.0 
2026-10-14 00:00 UT   23 06 11.1   -05 38 44     0.821    1.736  145.1   19.2    67   28.0 
2026-10-15 00:00 UT   23 06 04.7   -05 38 54     0.833    1.742  144.1   19.6    67   28.1 
2026-10-16 00:00 UT   23 06 00.7   -05 38 50     0.846    1.749  143.1   20.0    67   28.2 
2026-10-17 00:00 UT   23 05 59.0   -05 38 33     0.859    1.756  142.1   20.4    67   28.2 
2026-10-18 00:00 UT   23 05 59.5   -05 38 03     0.872    1.763  141.1   20.8    67   28.3 
2026-10-19 00:00 UT   23 06 02.2   -05 37 19     0.886    1.770  140.2   21.1    67   28.3 
2026-10-20 00:00 UT   23 06 07.1   -05 36 23     0.899    1.776  139.2   21.5    67   28.4 
2026-10-21 00:00 UT   23 06 14.1   -05 35 15     0.912    1.783  138.2   21.8    67   28.4 
2026-10-22 00:00 UT   23 06 23.1   -05 33 54     0.926    1.790  137.3   22.2    67   28.5 
2026-10-23 00:00 UT   23 06 34.2   -05 32 22     0.940    1.796  136.3   22.5    67   28.5 
2026-10-24 00:00 UT   23 06 47.3   -05 30 38     0.954    1.803  135.4   22.8    67   28.6 
2026-10-25 00:00 UT   23 07 02.2   -05 28 43     0.968    1.810  134.5   23.1    67   28.6 
2026-10-26 00:00 UT   23 07 19.0   -05 26 37     0.982    1.816  133.6   23.4    67   28.7 
2026-10-27 00:00 UT   23 07 37.7   -05 24 20     0.996    1.823  132.6   23.6    67   28.7 
2026-10-28 00:00 UT   23 07 58.1   -05 21 53     1.011    1.829  131.7   23.9    67   28.8 
2026-10-29 00:00 UT   23 08 20.3   -05 19 15     1.025    1.836  130.8   24.2    67   28.8 
2026-10-30 00:00 UT   23 08 44.1   -05 16 28     1.040    1.843  130.0   24.4    67   28.8 
2026-10-31 00:00 UT   23 09 09.7   -05 13 30     1.055    1.849  129.1   24.6    67   28.9 
2026-11-01 00:00 UT   23 09 36.8   -05 10 23     1.070    1.856  128.2   24.9    67   28.9 
2026-11-02 00:00 UT   23 10 05.5   -05 07 07     1.085    1.862  127.3   25.1    67   29.0 
2026-11-03 00:00 UT   23 10 35.7   -05 03 41     1.100    1.869  126.5   25.3    67   29.0 
2026-11-04 00:00 UT   23 11 07.5   -05 00 06     1.115    1.875  125.6   25.5    67   29.1 
2026-11-05 00:00 UT   23 11 40.7   -04 56 22     1.131    1.882  124.8   25.7    67   29.1 
2026-11-06 00:00 UT   23 12 15.4   -04 52 30     1.146    1.888  123.9   25.8    67   29.2 
2026-11-07 00:00 UT   23 12 51.5   -04 48 29     1.162    1.894  123.1   26.0    67   29.2 
2026-11-08 00:00 UT   23 13 28.9   -04 44 19     1.177    1.901  122.2   26.2    67   29.2 
2026-11-09 00:00 UT   23 14 07.7   -04 40 01     1.193    1.907  121.4   26.3    67   29.3 
2026-11-10 00:00 UT   23 14 47.9   -04 35 35     1.209    1.914  120.6   26.5    67   29.3 
2026-11-11 00:00 UT   23 15 29.3   -04 31 01     1.225    1.920  119.8   26.6    67   29.4 
2026-11-12 00:00 UT   23 16 12.0   -04 26 19     1.241    1.926  119.0   26.7    67   29.4 

    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.