(136199) Eris
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	25 Aug 2026	18.6	95.467 AU	94.880 AU	01h49m	+00°04'	125.3°	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)                : 0.4382363
            a (Semimajor axis)              : 67.9347765
            i (Inclination)                 : 43.92596
            Ω (Longitude of ascending node) : 36.00471
            ω (Argument of perihelion)      : 150.79205
            M (Mean anomaly)                : 211.78075
            Epoch                           : 2026 Jun 09

            L (Longitude of perihelion)     : 14.07214
            B (Latitude of perihelion)      : 19.78710
            P (Orbital period in years)     : 559.94            
        

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
2026-08-25 00:00 UT   01 49 43.2   +00 04 13    94.880   95.467  125.3    0.5   256   18.6 
2026-08-25 13:43 UT   01 49 42.5   +00 04 07    94.872   95.467  125.8    0.5   257   18.6 
2026-08-26 00:00 UT   01 49 42.0   +00 04 03    94.866   95.467  126.2    0.5   257   18.6 
2026-08-27 00:00 UT   01 49 40.8   +00 03 52    94.853   95.467  127.2    0.5   257   18.6 
2026-08-28 00:00 UT   01 49 39.6   +00 03 42    94.840   95.467  128.1    0.5   257   18.6 
2026-08-29 00:00 UT   01 49 38.3   +00 03 31    94.827   95.466  129.1    0.5   258   18.6 
2026-08-30 00:00 UT   01 49 37.0   +00 03 20    94.814   95.466  130.0    0.5   258   18.6 
2026-08-31 00:00 UT   01 49 35.7   +00 03 09    94.801   95.466  131.0    0.5   258   18.6 
2026-09-01 00:00 UT   01 49 34.3   +00 02 58    94.789   95.466  131.9    0.5   259   18.6 
2026-09-02 00:00 UT   01 49 32.9   +00 02 47    94.776   95.465  132.8    0.4   259   18.6 
2026-09-03 00:00 UT   01 49 31.4   +00 02 35    94.764   95.465  133.8    0.4   259   18.6 
2026-09-04 00:00 UT   01 49 30.0   +00 02 24    94.752   95.465  134.7    0.4   260   18.6 
2026-09-05 00:00 UT   01 49 28.5   +00 02 13    94.741   95.465  135.7    0.4   260   18.6 
2026-09-06 00:00 UT   01 49 27.0   +00 02 01    94.729   95.464  136.6    0.4   260   18.6 
2026-09-07 00:00 UT   01 49 25.4   +00 01 49    94.718   95.464  137.6    0.4   261   18.6 
2026-09-08 00:00 UT   01 49 23.8   +00 01 38    94.707   95.464  138.5    0.4   261   18.6 
2026-09-09 00:00 UT   01 49 22.2   +00 01 26    94.696   95.464  139.4    0.4   261   18.6 
2026-09-10 00:00 UT   01 49 20.6   +00 01 14    94.686   95.463  140.4    0.4   262   18.6 
2026-09-11 00:00 UT   01 49 18.9   +00 01 02    94.675   95.463  141.3    0.4   262   18.6 
2026-09-12 00:00 UT   01 49 17.2   +00 00 50    94.665   95.463  142.2    0.4   263   18.6 
2026-09-13 00:00 UT   01 49 15.5   +00 00 38    94.655   95.463  143.2    0.4   263   18.6 
2026-09-14 00:00 UT   01 49 13.8   +00 00 26    94.645   95.462  144.1    0.4   264   18.6 
2026-09-15 00:00 UT   01 49 12.0   +00 00 14    94.636   95.462  145.1    0.3   264   18.6 
2026-09-16 00:00 UT   01 49 10.2   +00 00 02    94.627   95.462  146.0    0.3   265   18.6 
2026-09-17 00:00 UT   01 49 08.4   +00 00 10    94.618   95.462  146.9    0.3   265   18.6 
2026-09-18 00:00 UT   01 49 06.5   +00 00 22    94.609   95.461  147.8    0.3   266   18.6 
2026-09-19 00:00 UT   01 49 04.7   +00 00 34    94.601   95.461  148.8    0.3   267   18.6 
2026-09-20 00:00 UT   01 49 02.8   +00 00 47    94.593   95.461  149.7    0.3   267   18.6 
2026-09-21 00:00 UT   01 49 00.9   +00 00 59    94.585   95.461  150.6    0.3   268   18.6 
2026-09-22 00:00 UT   01 48 59.0   +00 01 11    94.577   95.460  151.5    0.3   269   18.6 
2026-09-23 00:00 UT   01 48 57.0   +00 01 23    94.570   95.460  152.4    0.3   270   18.6 
2026-09-24 00:00 UT   01 48 55.0   +00 01 36    94.562   95.460  153.3    0.3   271   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.