(136199) Eris
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	20 Apr 2024	18.7	95.674 AU	96.656 AU	01h46m	-00°32'	12.1°	0.1°
Opposition	17 Oct 2024	18.6	95.632 AU	94.654 AU	01h47m	-00°38'	169.1°	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)                : 0.4323164
            a (Semimajor axis)              : 68.1551275
            i (Inclination)                 : 43.74509
            Ω (Longitude of ascending node) : 36.07712
            ω (Argument of perihelion)      : 150.86731
            M (Mean anomaly)                : 209.40544
            Epoch                           : 2023 Sep 13

            L (Longitude of perihelion)     : 14.14565
            B (Latitude of perihelion)      : 19.67119
            P (Orbital period in years)     : 562.66            
        

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. A more printer-friendly version of the same chart can be found below.

Ephemerides:

Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2024-04-20 00:00 UT   01 46 38.6   +00 32 12    96.656   95.674   12.1    0.1   186   18.7 
2024-04-20 09:05 UT   01 46 39.5   +00 32 06    96.656   95.674   12.3    0.1   188   18.7 
2024-04-21 00:00 UT   01 46 40.9   +00 31 57    96.654   95.674   12.6    0.1   190   18.7 
2024-04-22 00:00 UT   01 46 43.3   +00 31 42    96.652   95.674   13.1    0.1   194   18.7 
2024-04-23 00:00 UT   01 46 45.6   +00 31 27    96.650   95.673   13.7    0.1   197   18.7 
2024-04-24 00:00 UT   01 46 48.0   +00 31 12    96.648   95.673   14.3    0.1   200   18.7 
2024-04-25 00:00 UT   01 46 50.4   +00 30 58    96.645   95.673   14.9    0.2   203   18.7 
2024-04-26 00:00 UT   01 46 52.7   +00 30 43    96.642   95.673   15.6    0.2   206   18.7 
2024-04-27 00:00 UT   01 46 55.0   +00 30 29    96.638   95.672   16.3    0.2   208   18.7 
2024-04-28 00:00 UT   01 46 57.4   +00 30 15    96.635   95.672   17.0    0.2   210   18.7 
2024-04-29 00:00 UT   01 46 59.7   +00 30 01    96.631   95.672   17.8    0.2   212   18.7 
2024-04-30 00:00 UT   01 47 02.0   +00 29 47    96.626   95.672   18.5    0.2   214   18.7 
2024-05-01 00:00 UT   01 47 04.3   +00 29 33    96.622   95.671   19.3    0.2   216   18.7 
2024-05-02 00:00 UT   01 47 06.7   +00 29 20    96.617   95.671   20.1    0.2   217   18.7 
2024-05-03 00:00 UT   01 47 09.0   +00 29 06    96.612   95.671   20.9    0.2   219   18.7 
2024-05-04 00:00 UT   01 47 11.2   +00 28 53    96.607   95.671   21.7    0.2   220   18.7 
2024-05-05 00:00 UT   01 47 13.5   +00 28 40    96.601   95.671   22.6    0.2   222   18.7 
2024-05-06 00:00 UT   01 47 15.8   +00 28 27    96.595   95.670   23.4    0.2   223   18.7 
2024-05-07 00:00 UT   01 47 18.1   +00 28 15    96.589   95.670   24.3    0.2   224   18.7 
2024-05-08 00:00 UT   01 47 20.3   +00 28 02    96.583   95.670   25.1    0.3   225   18.7 
2024-05-09 00:00 UT   01 47 22.5   +00 27 50    96.576   95.670   26.0    0.3   226   18.7 
2024-05-10 00:00 UT   01 47 24.8   +00 27 38    96.569   95.669   26.9    0.3   227   18.7 
2024-05-11 00:00 UT   01 47 27.0   +00 27 26    96.562   95.669   27.7    0.3   228   18.7 
2024-05-12 00:00 UT   01 47 29.2   +00 27 14    96.555   95.669   28.6    0.3   228   18.7 
2024-05-13 00:00 UT   01 47 31.4   +00 27 03    96.547   95.669   29.5    0.3   229   18.7 
2024-05-14 00:00 UT   01 47 33.5   +00 26 51    96.539   95.669   30.4    0.3   230   18.7 
2024-05-15 00:00 UT   01 47 35.7   +00 26 40    96.531   95.668   31.3    0.3   231   18.7 
2024-05-16 00:00 UT   01 47 37.8   +00 26 29    96.523   95.668   32.2    0.3   231   18.7 
2024-05-17 00:00 UT   01 47 39.9   +00 26 18    96.514   95.668   33.1    0.3   232   18.7 
2024-05-18 00:00 UT   01 47 42.0   +00 26 08    96.505   95.668   34.0    0.3   232   18.7 
2024-05-19 00:00 UT   01 47 44.1   +00 25 58    96.496   95.667   34.9    0.3   233   18.7 
2024-05-20 00:00 UT   01 47 46.2   +00 25 48    96.487   95.667   35.8    0.4   234   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.