(185) Eunike
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	31 Aug 2025	10.6	2.454 AU	1.446 AU	22h43m	-11°19'	176.9°	1.3°
Opposition	31 Aug 2025	10.6	2.454 AU	1.445 AU	22h43m	-11°27'	176.9°	1.3°

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)                : 0.1270007
            a (Semimajor axis)              : 2.7389752
            i (Inclination)                 : 23.25091
            Ω (Longitude of ascending node) : 153.73586
            ω (Argument of perihelion)      : 223.97726
            M (Mean anomaly)                : 303.49376
            Epoch                           : 2025 May 05

            L (Longitude of perihelion)     : 195.29464
            B (Latitude of perihelion)      : -15.90896
            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
2025-08-31 00:00 UT   22 43 53.7   -11 19 07     1.446    2.454  176.9    1.3   326   10.6 
2025-08-31 07:11 UT   22 43 41.3   -11 23 51     1.445    2.454  176.9    1.3   332   10.6 
2025-09-01 00:00 UT   22 43 12.2   -11 34 54     1.445    2.453  176.7    1.3   348   10.6 
2025-09-02 00:00 UT   22 42 30.5   -11 50 38     1.445    2.452  176.2    1.6     6   10.6 
2025-09-03 00:00 UT   22 41 48.8   -12 06 20     1.445    2.452  175.3    1.9    18   10.6 
2025-09-04 00:00 UT   22 41 07.1   -12 21 58     1.445    2.451  174.3    2.3    27   10.6 
2025-09-05 00:00 UT   22 40 25.5   -12 37 31     1.446    2.450  173.3    2.8    32   10.7 
2025-09-06 00:00 UT   22 39 44.0   -12 52 59     1.447    2.449  172.2    3.2    37   10.7 
2025-09-07 00:00 UT   22 39 02.7   -13 08 21     1.448    2.448  171.0    3.7    40   10.7 
2025-09-08 00:00 UT   22 38 21.7   -13 23 37     1.449    2.448  169.9    4.2    42   10.8 
2025-09-09 00:00 UT   22 37 40.9   -13 38 45     1.451    2.447  168.7    4.6    44   10.8 
2025-09-10 00:00 UT   22 37 00.6   -13 53 45     1.453    2.446  167.5    5.1    46   10.8 
2025-09-11 00:00 UT   22 36 20.7   -14 08 36     1.455    2.445  166.3    5.6    47   10.8 
2025-09-12 00:00 UT   22 35 41.2   -14 23 17     1.458    2.444  165.1    6.1    48   10.9 
2025-09-13 00:00 UT   22 35 02.4   -14 37 49     1.461    2.444  163.9    6.5    49   10.9 
2025-09-14 00:00 UT   22 34 24.1   -14 52 10     1.464    2.443  162.7    7.0    50   10.9 
2025-09-15 00:00 UT   22 33 46.5   -15 06 20     1.467    2.442  161.5    7.5    51   10.9 
2025-09-16 00:00 UT   22 33 09.6   -15 20 17     1.471    2.441  160.4    8.0    52   11.0 
2025-09-17 00:00 UT   22 32 33.6   -15 34 03     1.475    2.440  159.2    8.4    52   11.0 
2025-09-18 00:00 UT   22 31 58.3   -15 47 35     1.479    2.440  158.0    8.9    53   11.0 
2025-09-19 00:00 UT   22 31 24.0   -16 00 53     1.483    2.439  156.8    9.3    53   11.0 
2025-09-20 00:00 UT   22 30 50.6   -16 13 58     1.488    2.438  155.6    9.8    54   11.1 
2025-09-21 00:00 UT   22 30 18.3   -16 26 48     1.493    2.437  154.5   10.2    54   11.1 
2025-09-22 00:00 UT   22 29 47.0   -16 39 23     1.498    2.437  153.3   10.7    55   11.1 
2025-09-23 00:00 UT   22 29 16.8   -16 51 43     1.503    2.436  152.1   11.1    55   11.1 
2025-09-24 00:00 UT   22 28 47.8   -17 03 47     1.509    2.435  151.0   11.5    56   11.2 
2025-09-25 00:00 UT   22 28 20.0   -17 15 35     1.515    2.435  149.8   12.0    56   11.2 
2025-09-26 00:00 UT   22 27 53.5   -17 27 07     1.521    2.434  148.7   12.4    56   11.2 
2025-09-27 00:00 UT   22 27 28.2   -17 38 22     1.527    2.433  147.5   12.8    57   11.2 
2025-09-28 00:00 UT   22 27 04.3   -17 49 20     1.534    2.432  146.4   13.2    57   11.3 
2025-09-29 00:00 UT   22 26 41.8   -18 00 01     1.540    2.432  145.3   13.6    57   11.3 
2025-09-30 00:00 UT   22 26 20.6   -18 10 25     1.547    2.431  144.2   14.0    57   11.3 

    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.