(100) Hekate
ephemeris date magn radius delta ra dec elong phase
Today14 Jul 202513.12.907 AU2.548 AU14h08m-05°27'100.3°20.1°
Opposition22 Aug 202611.02.590 AU1.580 AU22h10m-15°29'176.0°1.5°
(100) Hekate - 2025-07-14
astro.vanbuitenen.nl


 
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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 Hekate are:

            e (Eccentricity)                : 0.1679921
            a (Semimajor axis)              : 3.0900434
            i (Inclination)                 : 6.43074
            Ω (Longitude of ascending node) : 127.15988
            ω (Argument of perihelion)      : 183.60213
            M (Mean anomaly)                : 286.91274
            Epoch                           : 2025 May 05

            L (Longitude of perihelion)     : 130.73940
            B (Latitude of perihelion)      : -0.40318
            P (Orbital period in years)     : 5.43            
        

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. A more printer-friendly version of the same chart can be found below.




Ephemerides:
Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2025-07-14 00:00 UT   14 08 41.6   -05 27 45     2.548    2.907  100.3   20.1   111   13.1 
2025-07-14 22:02 UT   14 09 07.1   -05 32 32     2.558    2.906   99.6   20.2   111   13.1 
2025-07-15 00:00 UT   14 09 09.5   -05 32 58     2.559    2.906   99.5   20.2   111   13.1 
2025-07-16 00:00 UT   14 09 38.5   -05 38 16     2.571    2.904   98.7   20.2   111   13.1 
2025-07-17 00:00 UT   14 10 08.6   -05 43 39     2.582    2.902   97.9   20.3   111   13.1 
2025-07-18 00:00 UT   14 10 39.8   -05 49 06     2.594    2.901   97.1   20.3   111   13.1 
2025-07-19 00:00 UT   14 11 12.0   -05 54 38     2.605    2.899   96.3   20.4   110   13.2 
2025-07-20 00:00 UT   14 11 45.4   -06 00 15     2.617    2.898   95.6   20.4   110   13.2 
2025-07-21 00:00 UT   14 12 19.8   -06 05 56     2.629    2.896   94.8   20.5   110   13.2 
2025-07-22 00:00 UT   14 12 55.3   -06 11 41     2.640    2.894   94.0   20.5   110   13.2 
2025-07-23 00:00 UT   14 13 31.8   -06 17 31     2.652    2.893   93.2   20.5   110   13.2 
2025-07-24 00:00 UT   14 14 09.4   -06 23 24     2.664    2.891   92.5   20.6   110   13.2 
2025-07-25 00:00 UT   14 14 47.9   -06 29 21     2.675    2.889   91.7   20.6   110   13.2 
2025-07-26 00:00 UT   14 15 27.6   -06 35 23     2.687    2.888   90.9   20.6   110   13.2 
2025-07-27 00:00 UT   14 16 08.2   -06 41 27     2.699    2.886   90.2   20.6   109   13.2 
2025-07-28 00:00 UT   14 16 49.8   -06 47 36     2.710    2.885   89.4   20.6   109   13.2 
2025-07-29 00:00 UT   14 17 32.4   -06 53 48     2.722    2.883   88.7   20.6   109   13.2 
2025-07-30 00:00 UT   14 18 15.9   -07 00 04     2.734    2.881   87.9   20.6   109   13.3 
2025-07-31 00:00 UT   14 19 00.5   -07 06 22     2.745    2.880   87.2   20.6   109   13.3 
2025-08-01 00:00 UT   14 19 45.9   -07 12 44     2.757    2.878   86.4   20.6   109   13.3 
2025-08-02 00:00 UT   14 20 32.4   -07 19 09     2.769    2.877   85.7   20.6   109   13.3 
2025-08-03 00:00 UT   14 21 19.7   -07 25 37     2.780    2.875   85.0   20.6   108   13.3 
2025-08-04 00:00 UT   14 22 08.0   -07 32 07     2.792    2.873   84.2   20.6   108   13.3 
2025-08-05 00:00 UT   14 22 57.1   -07 38 41     2.803    2.872   83.5   20.5   108   13.3 
2025-08-06 00:00 UT   14 23 47.2   -07 45 17     2.815    2.870   82.8   20.5   108   13.3 
2025-08-07 00:00 UT   14 24 38.1   -07 51 56     2.827    2.868   82.1   20.5   108   13.3 
2025-08-08 00:00 UT   14 25 30.0   -07 58 37     2.838    2.867   81.4   20.5   108   13.3 
2025-08-09 00:00 UT   14 26 22.7   -08 05 20     2.850    2.865   80.7   20.4   108   13.3 
2025-08-10 00:00 UT   14 27 16.2   -08 12 06     2.861    2.864   79.9   20.4   108   13.3 
2025-08-11 00:00 UT   14 28 10.6   -08 18 53     2.873    2.862   79.2   20.4   107   13.3 
2025-08-12 00:00 UT   14 29 05.8   -08 25 43     2.884    2.861   78.5   20.3   107   13.3 
2025-08-13 00:00 UT   14 30 01.9   -08 32 35     2.895    2.859   77.8   20.3   107   13.3 


    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.