(136199) Eris
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	3 Mar 2026	18.6	95.510 AU	96.227 AU	01h45m	-00°14'	43.5°	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)                : 0.4369641
            a (Semimajor axis)              : 67.9971866
            i (Inclination)                 : 43.86903
            Ω (Longitude of ascending node) : 36.02712
            ω (Argument of perihelion)      : 150.72905
            M (Mean anomaly)                : 211.45654
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 14.02426
            B (Latitude of perihelion)      : 19.80631
            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
2026-03-03 00:00 UT   01 45 56.3   +00 14 32    96.227   95.510   43.5    0.4    80   18.6 
2026-03-03 08:45 UT   01 45 56.9   +00 14 26    96.232   95.510   43.1    0.4    80   18.6 
2026-03-04 00:00 UT   01 45 58.0   +00 14 15    96.239   95.510   42.5    0.4    80   18.6 
2026-03-05 00:00 UT   01 45 59.7   +00 13 58    96.250   95.510   41.5    0.4    81   18.6 
2026-03-06 00:00 UT   01 46 01.4   +00 13 41    96.261   95.510   40.6    0.4    81   18.6 
2026-03-07 00:00 UT   01 46 03.1   +00 13 24    96.271   95.509   39.6    0.4    82   18.6 
2026-03-08 00:00 UT   01 46 04.9   +00 13 07    96.282   95.509   38.7    0.4    82   18.6 
2026-03-09 00:00 UT   01 46 06.7   +00 12 50    96.292   95.509   37.7    0.4    83   18.6 
2026-03-10 00:00 UT   01 46 08.6   +00 12 33    96.302   95.509   36.8    0.4    83   18.6 
2026-03-11 00:00 UT   01 46 10.4   +00 12 16    96.312   95.508   35.8    0.3    84   18.6 
2026-03-12 00:00 UT   01 46 12.3   +00 11 59    96.321   95.508   34.9    0.3    84   18.6 
2026-03-13 00:00 UT   01 46 14.2   +00 11 42    96.331   95.508   34.0    0.3    85   18.6 
2026-03-14 00:00 UT   01 46 16.1   +00 11 25    96.340   95.508   33.0    0.3    85   18.6 
2026-03-15 00:00 UT   01 46 18.1   +00 11 07    96.348   95.507   32.1    0.3    86   18.6 
2026-03-16 00:00 UT   01 46 20.1   +00 10 50    96.357   95.507   31.2    0.3    86   18.6 
2026-03-17 00:00 UT   01 46 22.1   +00 10 33    96.365   95.507   30.3    0.3    87   18.6 
2026-03-18 00:00 UT   01 46 24.1   +00 10 16    96.373   95.507   29.3    0.3    88   18.6 
2026-03-19 00:00 UT   01 46 26.1   +00 09 58    96.381   95.506   28.4    0.3    89   18.6 
2026-03-20 00:00 UT   01 46 28.2   +00 09 41    96.388   95.506   27.5    0.3    89   18.6 
2026-03-21 00:00 UT   01 46 30.2   +00 09 24    96.395   95.506   26.6    0.3    90   18.6 
2026-03-22 00:00 UT   01 46 32.3   +00 09 06    96.402   95.506   25.7    0.3    91   18.6 
2026-03-23 00:00 UT   01 46 34.5   +00 08 49    96.409   95.505   24.8    0.3    92   18.6 
2026-03-24 00:00 UT   01 46 36.6   +00 08 32    96.415   95.505   23.9    0.2    93   18.6 
2026-03-25 00:00 UT   01 46 38.7   +00 08 14    96.422   95.505   23.1    0.2    94   18.6 
2026-03-26 00:00 UT   01 46 40.9   +00 07 57    96.427   95.505   22.2    0.2    96   18.6 
2026-03-27 00:00 UT   01 46 43.1   +00 07 40    96.433   95.504   21.3    0.2    97   18.6 
2026-03-28 00:00 UT   01 46 45.3   +00 07 23    96.438   95.504   20.5    0.2    98   18.6 
2026-03-29 00:00 UT   01 46 47.5   +00 07 06    96.443   95.504   19.7    0.2   100   18.6 
2026-03-30 00:00 UT   01 46 49.7   +00 06 48    96.448   95.504   18.8    0.2   101   18.6 
2026-03-31 00:00 UT   01 46 52.0   +00 06 31    96.453   95.503   18.0    0.2   103   18.6 
2026-04-01 00:00 UT   01 46 54.2   +00 06 14    96.457   95.503   17.3    0.2   105   18.6 
2026-04-02 00:00 UT   01 46 56.5   +00 05 57    96.461   95.503   16.5    0.2   107   18.6 

    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.