(15) Eunomia
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	16 Sep 2025	11.0	2.802 AU	3.740 AU	10h22m	+04°29'	18.1°	6.4°
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)                : 0.1877168
            a (Semimajor axis)              : 2.6432479
            i (Inclination)                 : 11.76051
            Ω (Longitude of ascending node) : 292.87955
            ω (Argument of perihelion)      : 98.63439
            M (Mean anomaly)                : 67.71314
            Epoch                           : 2025 May 05

            L (Longitude of perihelion)     : 211.69620
            B (Latitude of perihelion)      : 11.62535
            P (Orbital period in years)     : 4.30            
        

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
2025-09-16 00:00 UT   10 22 12.0   +04 29 11     3.740    2.802   18.1    6.4   275   11.0 
2025-09-16 16:08 UT   10 23 09.5   +04 22 14     3.738    2.803   18.5    6.5   275   11.0 
2025-09-17 00:00 UT   10 23 37.4   +04 18 50     3.737    2.804   18.7    6.6   275   11.0 
2025-09-18 00:00 UT   10 25 02.6   +04 08 27     3.735    2.805   19.2    6.8   276   11.0 
2025-09-19 00:00 UT   10 26 27.6   +03 58 03     3.732    2.807   19.8    7.0   276   11.0 
2025-09-20 00:00 UT   10 27 52.3   +03 47 39     3.729    2.809   20.4    7.1   277   11.0 
2025-09-21 00:00 UT   10 29 16.7   +03 37 13     3.725    2.811   20.9    7.3   277   11.1 
2025-09-22 00:00 UT   10 30 40.9   +03 26 46     3.722    2.812   21.5    7.5   278   11.1 
2025-09-23 00:00 UT   10 32 04.8   +03 16 19     3.719    2.814   22.1    7.7   278   11.1 
2025-09-24 00:00 UT   10 33 28.5   +03 05 51     3.715    2.816   22.7    7.9   278   11.1 
2025-09-25 00:00 UT   10 34 51.9   +02 55 22     3.711    2.818   23.2    8.1   279   11.1 
2025-09-26 00:00 UT   10 36 15.0   +02 44 52     3.707    2.819   23.8    8.3   279   11.1 
2025-09-27 00:00 UT   10 37 37.9   +02 34 22     3.703    2.821   24.4    8.4   279   11.1 
2025-09-28 00:00 UT   10 39 00.5   +02 23 51     3.699    2.823   25.0    8.6   280   11.1 
2025-09-29 00:00 UT   10 40 22.9   +02 13 19     3.695    2.825   25.6    8.8   280   11.1 
2025-09-30 00:00 UT   10 41 44.9   +02 02 47     3.690    2.826   26.2    9.0   280   11.1 
2025-10-01 00:00 UT   10 43 06.7   +01 52 14     3.686    2.828   26.8    9.2   281   11.1 
2025-10-02 00:00 UT   10 44 28.2   +01 41 41     3.681    2.830   27.4    9.4   281   11.1 
2025-10-03 00:00 UT   10 45 49.4   +01 31 07     3.676    2.831   28.0    9.5   281   11.1 
2025-10-04 00:00 UT   10 47 10.3   +01 20 33     3.671    2.833   28.5    9.7   281   11.1 
2025-10-05 00:00 UT   10 48 31.0   +01 09 59     3.666    2.835   29.1    9.9   282   11.1 
2025-10-06 00:00 UT   10 49 51.3   +00 59 24     3.661    2.837   29.7   10.1   282   11.2 
2025-10-07 00:00 UT   10 51 11.4   +00 48 49     3.656    2.838   30.3   10.2   282   11.2 
2025-10-08 00:00 UT   10 52 31.2   +00 38 13     3.650    2.840   30.9   10.4   282   11.2 

    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.