(15) Eunomia
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	28 Dec 2025	11.0	2.964 AU	2.839 AU	12h15m	-12°50'	87.5°	19.4°
Opposition	24 Mar 2026	9.9	3.062 AU	2.093 AU	11h49m	-16°50'	163.5°	5.3°

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 Eunomia are:

            e (Eccentricity)                : 0.1877813
            a (Semimajor axis)              : 2.6421861
            i (Inclination)                 : 11.76143
            Ω (Longitude of ascending node) : 292.88123
            ω (Argument of perihelion)      : 98.50720
            M (Mean anomaly)                : 113.72578
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 211.56812
            B (Latitude of perihelion)      : 11.63020
            P (Orbital period in years)     : 4.29            
        

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
2025-12-28 00:00 UT   12 15 22.3   -12 50 05     2.839    2.964   87.5   19.4   293   11.0 
2025-12-28 18:58 UT   12 15 48.7   -12 56 42     2.829    2.965   88.2   19.4   293   11.0 
2025-12-29 00:00 UT   12 15 55.5   -12 58 27     2.826    2.965   88.3   19.4   293   11.0 
2025-12-30 00:00 UT   12 16 27.8   -13 06 45     2.813    2.967   89.2   19.4   294   11.0 
2025-12-31 00:00 UT   12 16 59.0   -13 14 58     2.800    2.968   90.0   19.3   294   11.0 
2026-01-01 00:00 UT   12 17 29.2   -13 23 07     2.788    2.969   90.8   19.3   294   11.0 
2026-01-02 00:00 UT   12 17 58.3   -13 31 12     2.775    2.970   91.7   19.3   294   11.0 
2026-01-03 00:00 UT   12 18 26.3   -13 39 12     2.762    2.972   92.5   19.3   294   11.0 
2026-01-04 00:00 UT   12 18 53.3   -13 47 07     2.749    2.973   93.4   19.3   294   11.0 
2026-01-05 00:00 UT   12 19 19.2   -13 54 57     2.736    2.974   94.2   19.3   295   11.0 
2026-01-06 00:00 UT   12 19 44.0   -14 02 42     2.723    2.976   95.1   19.2   295   10.9 
2026-01-07 00:00 UT   12 20 07.6   -14 10 23     2.710    2.977   95.9   19.2   295   10.9 
2026-01-08 00:00 UT   12 20 30.1   -14 17 58     2.698    2.978   96.8   19.1   295   10.9 
2026-01-09 00:00 UT   12 20 51.4   -14 25 28     2.685    2.980   97.6   19.1   295   10.9 
2026-01-10 00:00 UT   12 21 11.6   -14 32 52     2.672    2.981   98.5   19.0   296   10.9 
2026-01-11 00:00 UT   12 21 30.6   -14 40 11     2.659    2.982   99.4   19.0   296   10.9 
2026-01-12 00:00 UT   12 21 48.3   -14 47 24     2.647    2.984  100.3   18.9   296   10.9 
2026-01-13 00:00 UT   12 22 04.9   -14 54 31     2.634    2.985  101.2   18.9   296   10.9 
2026-01-14 00:00 UT   12 22 20.2   -15 01 33     2.621    2.986  102.1   18.8   296   10.9 
2026-01-15 00:00 UT   12 22 34.2   -15 08 28     2.609    2.987  103.0   18.7   297   10.8 
2026-01-16 00:00 UT   12 22 47.0   -15 15 17     2.596    2.989  103.9   18.6   297   10.8 
2026-01-17 00:00 UT   12 22 58.5   -15 21 59     2.584    2.990  104.8   18.6   297   10.8 
2026-01-18 00:00 UT   12 23 08.7   -15 28 35     2.571    2.991  105.7   18.5   297   10.8 
2026-01-19 00:00 UT   12 23 17.6   -15 35 04     2.559    2.992  106.6   18.4   297   10.8 
2026-01-20 00:00 UT   12 23 25.2   -15 41 26     2.547    2.994  107.5   18.3   298   10.8 
2026-01-21 00:00 UT   12 23 31.4   -15 47 41     2.535    2.995  108.4   18.2   298   10.8 
2026-01-22 00:00 UT   12 23 36.3   -15 53 49     2.522    2.996  109.3   18.1   298   10.8 
2026-01-23 00:00 UT   12 23 39.9   -15 59 50     2.510    2.997  110.3   17.9   299   10.7 
2026-01-24 00:00 UT   12 23 42.1   -16 05 43     2.498    2.998  111.2   17.8   299   10.7 
2026-01-25 00:00 UT   12 23 43.0   -16 11 29     2.487    3.000  112.1   17.7   299   10.7 
2026-01-26 00:00 UT   12 23 42.5   -16 17 07     2.475    3.001  113.1   17.6   299   10.7 
2026-01-27 00:00 UT   12 23 40.6   -16 22 37     2.463    3.002  114.0   17.4   300   10.7 

    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.