(136199) Eris
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	30 May 2023	18.7	95.748 AU	96.469 AU	01h47m	-00°40'	44.4°	0.4°
Opposition	18 Oct 2023	18.6	95.716 AU	94.739 AU	01h46m	-00°54'	168.9°	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)                : 0.4319604
            a (Semimajor axis)              : 68.1460186
            i (Inclination)                 : 43.76068
            Ω (Longitude of ascending node) : 36.07060
            ω (Argument of perihelion)      : 150.99379
            M (Mean anomaly)                : 208.76911
            Epoch                           : 2023 Feb 25

            L (Longitude of perihelion)     : 14.24728
            B (Latitude of perihelion)      : 19.59583
            P (Orbital period in years)     : 562.55            
        

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
2023-05-30 00:00 UT   01 47 33.6   +00 40 04    96.469   95.748   44.4    0.4   237   18.7 
2023-05-30 11:14 UT   01 47 34.4   +00 39 60    96.464   95.748   44.9    0.4   238   18.7 
2023-05-31 00:00 UT   01 47 35.4   +00 39 56    96.458   95.748   45.4    0.4   238   18.7 
2023-06-01 00:00 UT   01 47 37.2   +00 39 48    96.446   95.748   46.3    0.4   238   18.7 
2023-06-02 00:00 UT   01 47 39.0   +00 39 41    96.434   95.747   47.2    0.4   238   18.7 
2023-06-03 00:00 UT   01 47 40.8   +00 39 34    96.422   95.747   48.1    0.5   239   18.7 
2023-06-04 00:00 UT   01 47 42.5   +00 39 27    96.409   95.747   49.0    0.5   239   18.7 
2023-06-05 00:00 UT   01 47 44.2   +00 39 21    96.397   95.747   49.9    0.5   239   18.7 
2023-06-06 00:00 UT   01 47 45.9   +00 39 15    96.384   95.747   50.9    0.5   240   18.7 
2023-06-07 00:00 UT   01 47 47.6   +00 39 09    96.371   95.746   51.8    0.5   240   18.7 
2023-06-08 00:00 UT   01 47 49.2   +00 39 03    96.358   95.746   52.7    0.5   240   18.7 
2023-06-09 00:00 UT   01 47 50.8   +00 38 57    96.344   95.746   53.6    0.5   241   18.7 
2023-06-10 00:00 UT   01 47 52.4   +00 38 52    96.331   95.746   54.6    0.5   241   18.7 
2023-06-11 00:00 UT   01 47 54.0   +00 38 47    96.317   95.745   55.5    0.5   241   18.7 
2023-06-12 00:00 UT   01 47 55.5   +00 38 42    96.304   95.745   56.4    0.5   241   18.7 
2023-06-13 00:00 UT   01 47 57.0   +00 38 37    96.290   95.745   57.3    0.5   242   18.7 
2023-06-14 00:00 UT   01 47 58.4   +00 38 33    96.275   95.745   58.3    0.5   242   18.7 
2023-06-15 00:00 UT   01 47 59.9   +00 38 29    96.261   95.745   59.2    0.5   242   18.7 
2023-06-16 00:00 UT   01 48 01.3   +00 38 25    96.247   95.744   60.1    0.5   242   18.7 
2023-06-17 00:00 UT   01 48 02.6   +00 38 21    96.232   95.744   61.0    0.5   243   18.7 
2023-06-18 00:00 UT   01 48 04.0   +00 38 18    96.217   95.744   62.0    0.5   243   18.7 
2023-06-19 00:00 UT   01 48 05.3   +00 38 15    96.203   95.744   62.9    0.5   243   18.7 
2023-06-20 00:00 UT   01 48 06.6   +00 38 12    96.188   95.743   63.8    0.5   243   18.7 
2023-06-21 00:00 UT   01 48 07.8   +00 38 09    96.173   95.743   64.7    0.5   244   18.7 
2023-06-22 00:00 UT   01 48 09.0   +00 38 07    96.157   95.743   65.7    0.6   244   18.7 
2023-06-23 00:00 UT   01 48 10.2   +00 38 05    96.142   95.743   66.6    0.6   244   18.7 
2023-06-24 00:00 UT   01 48 11.3   +00 38 03    96.127   95.743   67.5    0.6   244   18.7 
2023-06-25 00:00 UT   01 48 12.4   +00 38 01    96.111   95.742   68.5    0.6   244   18.7 
2023-06-26 00:00 UT   01 48 13.5   +00 37 60    96.095   95.742   69.4    0.6   245   18.7 
2023-06-27 00:00 UT   01 48 14.5   +00 37 59    96.080   95.742   70.3    0.6   245   18.7 
2023-06-28 00:00 UT   01 48 15.5   +00 37 58    96.064   95.742   71.2    0.6   245   18.7 
2023-06-29 00:00 UT   01 48 16.5   +00 37 57    96.048   95.741   72.2    0.6   245   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.