(15) Eunomia
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	20 Jul 2025	10.8	2.694 AU	3.661 AU	08h53m	+13°40'	15.2°	5.7°
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
2025-07-20 00:00 UT   08 53 39.5   +13 40 59     3.661    2.694   15.2    5.7   119   10.8 
2025-07-20 05:47 UT   08 54 02.8   +13 38 58     3.662    2.694   15.1    5.6   120   10.8 
2025-07-21 00:00 UT   08 55 16.2   +13 32 35     3.666    2.696   14.7    5.5   120   10.8 
2025-07-22 00:00 UT   08 56 52.8   +13 24 08     3.671    2.698   14.2    5.3   121   10.8 
2025-07-23 00:00 UT   08 58 29.3   +13 15 38     3.676    2.700   13.7    5.1   122   10.8 
2025-07-24 00:00 UT   09 00 05.6   +13 07 05     3.681    2.701   13.2    4.9   123   10.8 
2025-07-25 00:00 UT   09 01 41.7   +12 58 29     3.685    2.703   12.7    4.7   124   10.8 
2025-07-26 00:00 UT   09 03 17.7   +12 49 50     3.690    2.705   12.2    4.5   125   10.8 
2025-07-27 00:00 UT   09 04 53.5   +12 41 09     3.694    2.707   11.7    4.3   126   10.8 
2025-07-28 00:00 UT   09 06 29.2   +12 32 25     3.698    2.709   11.2    4.2   127   10.8 
2025-07-29 00:00 UT   09 08 04.7   +12 23 38     3.702    2.711   10.7    4.0   128   10.8 
2025-07-30 00:00 UT   09 09 40.0   +12 14 49     3.706    2.713   10.2    3.8   129   10.8 
2025-07-31 00:00 UT   09 11 15.2   +12 05 57     3.710    2.715    9.7    3.6   131   10.8 
2025-08-01 00:00 UT   09 12 50.2   +11 57 02     3.714    2.717    9.2    3.4   133   10.8 
2025-08-02 00:00 UT   09 14 25.0   +11 48 05     3.717    2.719    8.7    3.3   134   10.8 
2025-08-03 00:00 UT   09 15 59.6   +11 39 06     3.721    2.721    8.3    3.1   136   10.8 
2025-08-04 00:00 UT   09 17 34.1   +11 30 04     3.724    2.723    7.8    2.9   139   10.7 
2025-08-05 00:00 UT   09 19 08.4   +11 20 59     3.727    2.724    7.4    2.7   141   10.7 
2025-08-06 00:00 UT   09 20 42.5   +11 11 52     3.730    2.726    6.9    2.6   144   10.7 
2025-08-07 00:00 UT   09 22 16.4   +11 02 42     3.733    2.728    6.5    2.4   147   10.7 
2025-08-08 00:00 UT   09 23 50.1   +10 53 31     3.736    2.730    6.1    2.3   151   10.7 
2025-08-09 00:00 UT   09 25 23.7   +10 44 17     3.739    2.732    5.8    2.1   155   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.