(136199) Eris
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	26 May 2026	18.6	95.490 AU	96.261 AU	01h48m	+00°06'	40.2°	0.4°
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)                : 0.4369635
            a (Semimajor axis)              : 67.9971911
            i (Inclination)                 : 43.86902
            Ω (Longitude of ascending node) : 36.02712
            ω (Argument of perihelion)      : 150.72925
            M (Mean anomaly)                : 211.45607
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 14.02442
            B (Latitude of perihelion)      : 19.80618
            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
2026-05-26 00:00 UT   01 48 58.5   +00 06 24    96.261   95.490   40.2    0.4   236   18.6 
2026-05-26 09:01 UT   01 48 59.3   +00 06 27    96.257   95.490   40.6    0.4   237   18.6 
2026-05-27 00:00 UT   01 49 00.5   +00 06 33    96.250   95.489   41.1    0.4   237   18.6 
2026-05-28 00:00 UT   01 49 02.4   +00 06 41    96.239   95.489   42.1    0.4   237   18.6 
2026-05-29 00:00 UT   01 49 04.3   +00 06 50    96.228   95.489   43.0    0.4   238   18.6 
2026-05-30 00:00 UT   01 49 06.2   +00 06 58    96.217   95.489   43.9    0.4   238   18.6 
2026-05-31 00:00 UT   01 49 08.0   +00 07 06    96.205   95.488   44.8    0.4   238   18.6 
2026-06-01 00:00 UT   01 49 09.8   +00 07 14    96.193   95.488   45.7    0.4   239   18.6 
2026-06-02 00:00 UT   01 49 11.6   +00 07 21    96.181   95.488   46.7    0.4   239   18.6 
2026-06-03 00:00 UT   01 49 13.4   +00 07 29    96.169   95.488   47.6    0.4   239   18.6 
2026-06-04 00:00 UT   01 49 15.2   +00 07 36    96.157   95.487   48.5    0.5   240   18.6 
2026-06-05 00:00 UT   01 49 16.9   +00 07 43    96.144   95.487   49.4    0.5   240   18.6 
2026-06-06 00:00 UT   01 49 18.6   +00 07 49    96.131   95.487   50.3    0.5   240   18.6 
2026-06-07 00:00 UT   01 49 20.3   +00 07 56    96.118   95.487   51.3    0.5   240   18.7 
2026-06-08 00:00 UT   01 49 21.9   +00 08 02    96.105   95.486   52.2    0.5   241   18.7 
2026-06-09 00:00 UT   01 49 23.5   +00 08 08    96.092   95.486   53.1    0.5   241   18.7 
2026-06-10 00:00 UT   01 49 25.1   +00 08 13    96.079   95.486   54.0    0.5   241   18.7 
2026-06-11 00:00 UT   01 49 26.7   +00 08 19    96.065   95.486   55.0    0.5   242   18.7 
2026-06-12 00:00 UT   01 49 28.2   +00 08 24    96.051   95.485   55.9    0.5   242   18.7 
2026-06-13 00:00 UT   01 49 29.7   +00 08 29    96.037   95.485   56.8    0.5   242   18.7 
2026-06-14 00:00 UT   01 49 31.2   +00 08 34    96.023   95.485   57.8    0.5   242   18.7 
2026-06-15 00:00 UT   01 49 32.6   +00 08 38    96.009   95.485   58.7    0.5   243   18.7 
2026-06-16 00:00 UT   01 49 34.0   +00 08 43    95.995   95.484   59.6    0.5   243   18.7 
2026-06-17 00:00 UT   01 49 35.4   +00 08 47    95.980   95.484   60.5    0.5   243   18.7 
2026-06-18 00:00 UT   01 49 36.7   +00 08 50    95.965   95.484   61.5    0.5   243   18.7 
2026-06-19 00:00 UT   01 49 38.1   +00 08 54    95.950   95.484   62.4    0.5   243   18.7 
2026-06-20 00:00 UT   01 49 39.3   +00 08 57    95.935   95.483   63.3    0.5   244   18.7 
2026-06-21 00:00 UT   01 49 40.6   +00 09 00    95.920   95.483   64.3    0.5   244   18.7 
2026-06-22 00:00 UT   01 49 41.8   +00 09 03    95.905   95.483   65.2    0.6   244   18.7 
2026-06-23 00:00 UT   01 49 43.0   +00 09 05    95.890   95.483   66.1    0.6   244   18.7 
2026-06-24 00:00 UT   01 49 44.1   +00 09 08    95.874   95.482   67.0    0.6   245   18.7 
2026-06-25 00:00 UT   01 49 45.3   +00 09 10    95.859   95.482   68.0    0.6   245   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.