(136199) Eris
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	22 Jun 2026	18.7	95.483 AU	95.905 AU	01h49m	+00°09'	65.2°	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)                : 0.4369635
            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
2026-06-22 00:00 UT   01 49 41.8   +00 09 03    95.905   95.483   65.2    0.6   244   18.7 
2026-06-22 02:54 UT   01 49 42.0   +00 09 03    95.903   95.483   65.3    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 
2026-06-26 00:00 UT   01 49 46.3   +00 09 11    95.843   95.482   68.9    0.6   245   18.7 
2026-06-27 00:00 UT   01 49 47.4   +00 09 13    95.827   95.482   69.8    0.6   245   18.7 
2026-06-28 00:00 UT   01 49 48.4   +00 09 14    95.812   95.482   70.8    0.6   245   18.7 
2026-06-29 00:00 UT   01 49 49.4   +00 09 15    95.796   95.481   71.7    0.6   245   18.7 
2026-06-30 00:00 UT   01 49 50.3   +00 09 16    95.780   95.481   72.6    0.6   246   18.7 
2026-07-01 00:00 UT   01 49 51.2   +00 09 17    95.764   95.481   73.6    0.6   246   18.7 
2026-07-02 00:00 UT   01 49 52.1   +00 09 17    95.747   95.481   74.5    0.6   246   18.7 
2026-07-03 00:00 UT   01 49 52.9   +00 09 17    95.731   95.480   75.4    0.6   246   18.7 
2026-07-04 00:00 UT   01 49 53.7   +00 09 17    95.715   95.480   76.4    0.6   246   18.7 
2026-07-05 00:00 UT   01 49 54.5   +00 09 17    95.698   95.480   77.3    0.6   247   18.7 
2026-07-06 00:00 UT   01 49 55.2   +00 09 16    95.682   95.480   78.2    0.6   247   18.7 
2026-07-07 00:00 UT   01 49 55.9   +00 09 15    95.665   95.479   79.2    0.6   247   18.7 
2026-07-08 00:00 UT   01 49 56.6   +00 09 14    95.649   95.479   80.1    0.6   247   18.7 
2026-07-09 00:00 UT   01 49 57.2   +00 09 13    95.632   95.479   81.0    0.6   247   18.7 
2026-07-10 00:00 UT   01 49 57.8   +00 09 11    95.615   95.479   82.0    0.6   247   18.7 
2026-07-11 00:00 UT   01 49 58.3   +00 09 10    95.599   95.478   82.9    0.6   248   18.7 
2026-07-12 00:00 UT   01 49 58.8   +00 09 08    95.582   95.478   83.8    0.6   248   18.7 
2026-07-13 00:00 UT   01 49 59.3   +00 09 05    95.565   95.478   84.8    0.6   248   18.7 
2026-07-14 00:00 UT   01 49 59.7   +00 09 03    95.548   95.478   85.7    0.6   248   18.7 
2026-07-15 00:00 UT   01 50 00.1   +00 09 00    95.531   95.477   86.7    0.6   248   18.7 
2026-07-16 00:00 UT   01 50 00.5   +00 08 57    95.514   95.477   87.6    0.6   249   18.7 
2026-07-17 00:00 UT   01 50 00.8   +00 08 54    95.498   95.477   88.5    0.6   249   18.7 
2026-07-18 00:00 UT   01 50 01.1   +00 08 51    95.481   95.477   89.5    0.6   249   18.7 
2026-07-19 00:00 UT   01 50 01.3   +00 08 47    95.464   95.476   90.4    0.6   249   18.7 
2026-07-20 00:00 UT   01 50 01.5   +00 08 43    95.447   95.476   91.3    0.6   249   18.7 
2026-07-21 00:00 UT   01 50 01.6   +00 08 39    95.430   95.476   92.3    0.6   249   18.7 
2026-07-22 00:00 UT   01 50 01.8   +00 08 35    95.413   95.476   93.2    0.6   250   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.