2026 HK4
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	23 Oct 2026	29.6	1.728 AU	1.619 AU	08h52m	+18°31'	78.8°	34.4°

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 HK4 are:

            e (Eccentricity)                : 0.6683758
            a (Semimajor axis)              : 1.6559491
            i (Inclination)                 : 0.91450
            Ω (Longitude of ascending node) : 24.28976
            ω (Argument of perihelion)      : 297.08134
            M (Mean anomaly)                : 352.60943
            Epoch                           : 2026 Jun 09

            L (Longitude of perihelion)     : -38.62594
            B (Latitude of perihelion)      : -0.81423
            P (Orbital period in years)     : 2.13            
        

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
2026-10-23 00:00 UT   08 52 33.5   +18 31 11     1.619    1.728   78.8   34.4   286   29.6 
2026-10-23 14:25 UT   08 53 05.3   +18 29 23     1.616    1.733   79.3   34.3   286   29.6 
2026-10-24 00:00 UT   08 53 26.0   +18 28 13     1.614    1.736   79.6   34.3   286   29.6 
2026-10-25 00:00 UT   08 54 16.7   +18 25 22     1.609    1.745   80.4   34.2   286   29.6 
2026-10-26 00:00 UT   08 55 05.6   +18 22 37     1.605    1.753   81.2   34.1   286   29.6 
2026-10-27 00:00 UT   08 55 52.6   +18 19 59     1.600    1.762   82.0   34.0   286   29.6 
2026-10-28 00:00 UT   08 56 37.8   +18 17 28     1.595    1.770   82.8   33.8   286   29.6 
2026-10-29 00:00 UT   08 57 21.2   +18 15 05     1.589    1.778   83.6   33.7   286   29.6 
2026-10-30 00:00 UT   08 58 02.7   +18 12 48     1.584    1.787   84.4   33.6   286   29.6 
2026-10-31 00:00 UT   08 58 42.3   +18 10 39     1.579    1.795   85.3   33.5   286   29.6 
2026-11-01 00:00 UT   08 59 20.0   +18 08 38     1.573    1.803   86.1   33.3   286   29.6 
2026-11-02 00:00 UT   08 59 55.7   +18 06 45     1.568    1.811   87.0   33.2   286   29.6 
2026-11-03 00:00 UT   09 00 29.4   +18 05 00     1.562    1.819   87.9   33.0   286   29.6 
2026-11-04 00:00 UT   09 01 01.1   +18 03 23     1.557    1.827   88.7   32.9   286   29.6 
2026-11-05 00:00 UT   09 01 30.8   +18 01 55     1.551    1.835   89.6   32.7   286   29.6 
2026-11-06 00:00 UT   09 01 58.4   +18 00 36     1.545    1.843   90.5   32.5   286   29.6 
2026-11-07 00:00 UT   09 02 23.9   +17 59 25     1.539    1.851   91.4   32.4   286   29.6 
2026-11-08 00:00 UT   09 02 47.2   +17 58 24     1.533    1.859   92.3   32.2   286   29.5 
2026-11-09 00:00 UT   09 03 08.5   +17 57 31     1.527    1.867   93.2   32.0   287   29.5 
2026-11-10 00:00 UT   09 03 27.5   +17 56 49     1.521    1.874   94.2   31.8   287   29.5 
2026-11-11 00:00 UT   09 03 44.4   +17 56 15     1.515    1.882   95.1   31.6   287   29.5 
2026-11-12 00:00 UT   09 03 59.0   +17 55 52     1.509    1.890   96.0   31.4   287   29.5 
2026-11-13 00:00 UT   09 04 11.3   +17 55 38     1.503    1.897   97.0   31.2   286   29.5 
2026-11-14 00:00 UT   09 04 21.3   +17 55 34     1.496    1.905   98.0   31.0   286   29.5 
2026-11-15 00:00 UT   09 04 29.1   +17 55 40     1.490    1.912   98.9   30.7   286   29.5 
2026-11-16 00:00 UT   09 04 34.5   +17 55 57     1.484    1.920   99.9   30.5   286   29.5 
2026-11-17 00:00 UT   09 04 37.5   +17 56 24     1.477    1.927  100.9   30.2   286   29.5 
2026-11-18 00:00 UT   09 04 38.1   +17 57 01     1.471    1.935  101.9   30.0   286   29.5 
2026-11-19 00:00 UT   09 04 36.3   +17 57 48     1.465    1.942  103.0   29.7   286   29.5 
2026-11-20 00:00 UT   09 04 32.1   +17 58 47     1.459    1.950  104.0   29.5   286   29.5 
2026-11-21 00:00 UT   09 04 25.4   +17 59 56     1.452    1.957  105.0   29.2   286   29.5 
2026-11-22 00:00 UT   09 04 16.2   +18 01 15     1.446    1.964  106.1   28.9   286   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.