(185) Eunike
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Opposition	31 Aug 2025	10.6	2.454 AU	1.445 AU	22h43m	-11°27'	176.9°	1.3°
Today	10 Oct 2025	11.5	2.424 AU	1.627 AU	22h24m	-19°38'	133.4°	17.4°

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 Eunike are:

            e (Eccentricity)                : 0.1268688
            a (Semimajor axis)              : 2.7384653
            i (Inclination)                 : 23.25271
            Ω (Longitude of ascending node) : 153.73581
            ω (Argument of perihelion)      : 224.02155
            M (Mean anomaly)                : 346.94073
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 195.33821
            B (Latitude of perihelion)      : -15.92323
            P (Orbital period in years)     : 4.53            
        

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
2025-10-10 00:00 UT   22 24 10.4   -19 38 24     1.627    2.424  133.4   17.4    60   11.5 
2025-10-10 04:37 UT   22 24 09.4   -19 39 48     1.629    2.424  133.2   17.5    60   11.5 
2025-10-11 00:00 UT   22 24 05.9   -19 45 35     1.636    2.424  132.3   17.7    60   11.5 
2025-10-12 00:00 UT   22 24 03.1   -19 52 28     1.646    2.423  131.3   18.0    60   11.6 
2025-10-13 00:00 UT   22 24 01.9   -19 59 05     1.655    2.422  130.3   18.3    60   11.6 
2025-10-14 00:00 UT   22 24 02.2   -20 05 23     1.664    2.422  129.2   18.6    61   11.6 
2025-10-15 00:00 UT   22 24 04.2   -20 11 25     1.674    2.421  128.2   18.9    61   11.6 
2025-10-16 00:00 UT   22 24 07.9   -20 17 10     1.684    2.421  127.2   19.1    61   11.7 
2025-10-17 00:00 UT   22 24 13.1   -20 22 37     1.694    2.420  126.2   19.4    61   11.7 
2025-10-18 00:00 UT   22 24 20.0   -20 27 48     1.704    2.419  125.2   19.7    61   11.7 
2025-10-19 00:00 UT   22 24 28.5   -20 32 41     1.714    2.419  124.3   19.9    62   11.7 
2025-10-20 00:00 UT   22 24 38.7   -20 37 19     1.724    2.418  123.3   20.1    62   11.7 
2025-10-21 00:00 UT   22 24 50.5   -20 41 39     1.734    2.418  122.3   20.4    62   11.8 
2025-10-22 00:00 UT   22 25 03.9   -20 45 44     1.745    2.417  121.4   20.6    62   11.8 
2025-10-23 00:00 UT   22 25 18.9   -20 49 32     1.755    2.417  120.4   20.8    62   11.8 
2025-10-24 00:00 UT   22 25 35.5   -20 53 04     1.766    2.416  119.5   21.0    62   11.8 
2025-10-25 00:00 UT   22 25 53.7   -20 56 20     1.777    2.415  118.5   21.2    63   11.8 
2025-10-26 00:00 UT   22 26 13.6   -20 59 21     1.788    2.415  117.6   21.4    63   11.8 
2025-10-27 00:00 UT   22 26 35.0   -21 02 07     1.799    2.414  116.7   21.6    63   11.9 
2025-10-28 00:00 UT   22 26 57.9   -21 04 37     1.810    2.414  115.8   21.8    63   11.9 
2025-10-29 00:00 UT   22 27 22.4   -21 06 52     1.821    2.413  114.8   21.9    63   11.9 
2025-10-30 00:00 UT   22 27 48.5   -21 08 52     1.833    2.413  113.9   22.1    63   11.9 
2025-10-31 00:00 UT   22 28 16.0   -21 10 38     1.844    2.412  113.0   22.3    63   11.9 
2025-11-01 00:00 UT   22 28 45.1   -21 12 10     1.855    2.412  112.2   22.4    64   12.0 
2025-11-02 00:00 UT   22 29 15.6   -21 13 27     1.867    2.411  111.3   22.6    64   12.0 
2025-11-03 00:00 UT   22 29 47.6   -21 14 31     1.878    2.411  110.4   22.7    64   12.0 
2025-11-04 00:00 UT   22 30 21.1   -21 15 21     1.890    2.410  109.5   22.8    64   12.0 
2025-11-05 00:00 UT   22 30 56.0   -21 15 57     1.902    2.410  108.7   22.9    64   12.0 
2025-11-06 00:00 UT   22 31 32.3   -21 16 20     1.914    2.409  107.8   23.1    64   12.0 
2025-11-07 00:00 UT   22 32 09.9   -21 16 30     1.925    2.409  107.0   23.2    64   12.1 
2025-11-08 00:00 UT   22 32 49.0   -21 16 27     1.937    2.408  106.1   23.3    65   12.1 
2025-11-09 00:00 UT   22 33 29.4   -21 16 12     1.949    2.408  105.3   23.4    65   12.1 

    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.