(136199) Eris
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	11 Feb 2026	18.7	95.515 AU	95.960 AU	01h45m	-00°19'	62.9°	0.5°
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
2026-02-11 00:00 UT   01 45 29.5   +00 19 45    95.960   95.515   62.9    0.5    74   18.7 
2026-02-11 06:55 UT   01 45 29.8   +00 19 41    95.964   95.515   62.7    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 34.9   +00 18 31    96.034   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 
2026-02-18 00:00 UT   01 45 37.4   +00 18 01    96.062   95.513   56.1    0.5    76   18.7 
2026-02-19 00:00 UT   01 45 38.6   +00 17 45    96.076   95.513   55.1    0.5    76   18.7 
2026-02-20 00:00 UT   01 45 39.9   +00 17 30    96.089   95.513   54.1    0.5    76   18.7 
2026-02-21 00:00 UT   01 45 41.3   +00 17 14    96.103   95.513   53.1    0.5    77   18.7 
2026-02-22 00:00 UT   01 45 42.6   +00 16 58    96.116   95.512   52.2    0.5    77   18.7 
2026-02-23 00:00 UT   01 45 44.0   +00 16 42    96.129   95.512   51.2    0.5    77   18.6 
2026-02-24 00:00 UT   01 45 45.4   +00 16 26    96.142   95.512   50.2    0.5    78   18.6 
2026-02-25 00:00 UT   01 45 46.9   +00 16 10    96.155   95.512   49.2    0.4    78   18.6 
2026-02-26 00:00 UT   01 45 48.4   +00 15 54    96.168   95.511   48.3    0.4    78   18.6 
2026-02-27 00:00 UT   01 45 49.9   +00 15 38    96.180   95.511   47.3    0.4    79   18.6 
2026-02-28 00:00 UT   01 45 51.5   +00 15 21    96.192   95.511   46.3    0.4    79   18.6 
2026-03-01 00:00 UT   01 45 53.0   +00 15 05    96.204   95.511   45.4    0.4    79   18.6 
2026-03-02 00:00 UT   01 45 54.7   +00 14 48    96.216   95.510   44.4    0.4    80   18.6 
2026-03-03 00:00 UT   01 45 56.3   +00 14 32    96.227   95.510   43.5    0.4    80   18.6 
2026-03-04 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 

    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.