(136199) Eris
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	18 Jan 2026	18.7	95.521 AU	95.571 AU	01h45m	-00°24'	86.8°	0.6°
Opposition	18 Oct 2026	18.6	95.454 AU	94.474 AU	01h48m	-00°06'	169.5°	0.1°

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 Eris are:

            e (Eccentricity)                : 0.4369644
            a (Semimajor axis)              : 67.9971685
            i (Inclination)                 : 43.86903
            Ω (Longitude of ascending node) : 36.02712
            ω (Argument of perihelion)      : 150.72903
            M (Mean anomaly)                : 211.45661
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 14.02425
            B (Latitude of perihelion)      : 19.80632
            P (Orbital period in years)     : 560.71            
        

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
2026-01-18 00:00 UT   01 45 16.9   +00 24 38    95.571   95.521   86.8    0.6    69   18.7 
2026-01-18 04:50 UT   01 45 16.9   +00 24 36    95.575   95.521   86.6    0.6    69   18.7 
2026-01-19 00:00 UT   01 45 17.0   +00 24 28    95.588   95.521   85.8    0.6    70   18.7 
2026-01-20 00:00 UT   01 45 17.1   +00 24 18    95.605   95.520   84.8    0.6    70   18.7 
2026-01-21 00:00 UT   01 45 17.2   +00 24 08    95.622   95.520   83.8    0.6    70   18.7 
2026-01-22 00:00 UT   01 45 17.4   +00 23 57    95.639   95.520   82.8    0.6    70   18.7 
2026-01-23 00:00 UT   01 45 17.7   +00 23 47    95.655   95.520   81.8    0.6    70   18.7 
2026-01-24 00:00 UT   01 45 17.9   +00 23 36    95.672   95.520   80.8    0.6    70   18.7 
2026-01-25 00:00 UT   01 45 18.2   +00 23 25    95.689   95.519   79.8    0.6    71   18.7 
2026-01-26 00:00 UT   01 45 18.6   +00 23 13    95.706   95.519   78.8    0.6    71   18.7 
2026-01-27 00:00 UT   01 45 19.0   +00 23 02    95.722   95.519   77.8    0.6    71   18.7 
2026-01-28 00:00 UT   01 45 19.4   +00 22 50    95.739   95.519   76.8    0.6    71   18.7 
2026-01-29 00:00 UT   01 45 19.9   +00 22 38    95.755   95.518   75.8    0.6    71   18.7 
2026-01-30 00:00 UT   01 45 20.4   +00 22 26    95.771   95.518   74.8    0.6    72   18.7 
2026-01-31 00:00 UT   01 45 20.9   +00 22 13    95.788   95.518   73.8    0.6    72   18.7 
2026-02-01 00:00 UT   01 45 21.5   +00 22 01    95.804   95.518   72.8    0.6    72   18.7 
2026-02-02 00:00 UT   01 45 22.1   +00 21 48    95.820   95.517   71.8    0.6    72   18.7 
2026-02-03 00:00 UT   01 45 22.8   +00 21 35    95.836   95.517   70.8    0.6    72   18.7 
2026-02-04 00:00 UT   01 45 23.5   +00 21 22    95.852   95.517   69.9    0.6    73   18.7 
2026-02-05 00:00 UT   01 45 24.3   +00 21 08    95.868   95.517   68.9    0.6    73   18.7 
2026-02-06 00:00 UT   01 45 25.0   +00 20 55    95.883   95.516   67.9    0.5    73   18.7 
2026-02-07 00:00 UT   01 45 25.9   +00 20 41    95.899   95.516   66.9    0.5    73   18.7 
2026-02-08 00:00 UT   01 45 26.7   +00 20 28    95.914   95.516   65.9    0.5    74   18.7 
2026-02-09 00:00 UT   01 45 27.6   +00 20 14    95.930   95.516   64.9    0.5    74   18.7 
2026-02-10 00:00 UT   01 45 28.6   +00 19 59    95.945   95.515   63.9    0.5    74   18.7 
2026-02-11 00:00 UT   01 45 29.5   +00 19 45    95.960   95.515   62.9    0.5    74   18.7 
2026-02-12 00:00 UT   01 45 30.5   +00 19 31    95.975   95.515   62.0    0.5    74   18.7 
2026-02-13 00:00 UT   01 45 31.6   +00 19 16    95.990   95.515   61.0    0.5    75   18.7 
2026-02-14 00:00 UT   01 45 32.7   +00 19 01    96.005   95.514   60.0    0.5    75   18.7 
2026-02-15 00:00 UT   01 45 33.8   +00 18 46    96.019   95.514   59.0    0.5    75   18.7 
2026-02-16 00:00 UT   01 45 35.0   +00 18 31    96.033   95.514   58.0    0.5    75   18.7 
2026-02-17 00:00 UT   01 45 36.1   +00 18 16    96.048   95.514   57.0    0.5    76   18.7 

    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.