(185) Eunike
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	12 Jul 2025	11.9	2.502 AU	1.788 AU	22h59m	-01°19'	124.0°	19.7°
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
2025-07-12 00:00 UT   22 59 06.4   -01 19 45     1.788    2.502  124.0   19.7   244   11.9 
2025-07-12 06:28 UT   22 59 10.2   -01 21 20     1.785    2.502  124.2   19.6   244   11.9 
2025-07-13 00:00 UT   22 59 20.0   -01 25 43     1.776    2.501  124.9   19.5   244   11.9 
2025-07-14 00:00 UT   22 59 32.3   -01 31 58     1.765    2.500  125.9   19.2   244   11.8 
2025-07-15 00:00 UT   22 59 43.1   -01 38 28     1.754    2.499  126.8   19.0   244   11.8 
2025-07-16 00:00 UT   22 59 52.6   -01 45 14     1.742    2.498  127.8   18.8   244   11.8 
2025-07-17 00:00 UT   23 00 00.7   -01 52 16     1.731    2.497  128.7   18.5   244   11.8 
2025-07-18 00:00 UT   23 00 07.4   -01 59 35     1.721    2.496  129.7   18.3   244   11.7 
2025-07-19 00:00 UT   23 00 12.7   -02 07 10     1.710    2.495  130.7   18.0   244   11.7 
2025-07-20 00:00 UT   23 00 16.6   -02 15 02     1.699    2.494  131.7   17.7   244   11.7 
2025-07-21 00:00 UT   23 00 19.1   -02 23 10     1.689    2.493  132.7   17.4   244   11.7 
2025-07-22 00:00 UT   23 00 20.1   -02 31 35     1.679    2.492  133.7   17.1   244   11.6 
2025-07-23 00:00 UT   23 00 19.7   -02 40 17     1.669    2.491  134.7   16.8   244   11.6 
2025-07-24 00:00 UT   23 00 17.8   -02 49 15     1.659    2.490  135.8   16.5   244   11.6 
2025-07-25 00:00 UT   23 00 14.6   -02 58 31     1.649    2.489  136.8   16.2   244   11.6 
2025-07-26 00:00 UT   23 00 09.9   -03 08 03     1.639    2.488  137.8   15.9   244   11.5 
2025-07-27 00:00 UT   23 00 03.7   -03 17 51     1.630    2.487  138.9   15.6   244   11.5 
2025-07-28 00:00 UT   22 59 56.2   -03 27 56     1.621    2.486  139.9   15.2   244   11.5 
2025-07-29 00:00 UT   22 59 47.2   -03 38 18     1.612    2.485  141.0   14.9   244   11.5 
2025-07-30 00:00 UT   22 59 36.9   -03 48 56     1.603    2.484  142.1   14.6   244   11.4 
2025-07-31 00:00 UT   22 59 25.1   -03 59 50     1.595    2.483  143.1   14.2   244   11.4 
2025-08-01 00:00 UT   22 59 12.0   -04 10 60     1.586    2.482  144.2   13.8   244   11.4 
2025-08-02 00:00 UT   22 58 57.5   -04 22 25     1.578    2.481  145.3   13.5   245   11.4 
2025-08-03 00:00 UT   22 58 41.6   -04 34 07     1.570    2.480  146.4   13.1   245   11.3 
2025-08-04 00:00 UT   22 58 24.4   -04 46 03     1.562    2.479  147.5   12.7   245   11.3 
2025-08-05 00:00 UT   22 58 05.9   -04 58 15     1.555    2.478  148.6   12.3   245   11.3 
2025-08-06 00:00 UT   22 57 46.1   -05 10 42     1.547    2.477  149.8   11.9   245   11.3 
2025-08-07 00:00 UT   22 57 25.0   -05 23 23     1.540    2.476  150.9   11.5   245   11.2 
2025-08-08 00:00 UT   22 57 02.6   -05 36 18     1.533    2.475  152.0   11.1   246   11.2 
2025-08-09 00:00 UT   22 56 39.0   -05 49 26     1.527    2.474  153.1   10.7   246   11.2 
2025-08-10 00:00 UT   22 56 14.1   -06 02 49     1.520    2.473  154.3   10.2   246   11.2 
2025-08-11 00:00 UT   22 55 48.1   -06 16 24     1.514    2.472  155.4    9.8   246   11.1 

    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.