(90377) Sedna
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	16 Jun 2026	20.8	82.923 AU	83.838 AU	04h07m	+08°59'	25.7°	0.3°
Opposition	23 Nov 2026	20.7	82.811 AU	81.845 AU	04h07m	+08°43'	168.0°	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 Sedna are:

            e (Eccentricity)                : 0.8612949
            a (Semimajor axis)              : 549.5301384
            i (Inclination)                 : 11.92592
            Ω (Longitude of ascending node) : 144.47863
            ω (Argument of perihelion)      : 311.00992
            M (Mean anomaly)                : 358.60722
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 96.10851
            B (Latitude of perihelion)      : -8.97102
            P (Orbital period in years)     : 12882.12            
        

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
2026-06-16 00:00 UT   04 07 14.1   +08 59 01    83.838   82.923   25.7    0.3   233   20.8 
2026-06-16 17:50 UT   04 07 16.3   +08 59 05    83.833   82.923   26.3    0.3   234   20.8 
2026-06-17 00:00 UT   04 07 17.0   +08 59 06    83.831   82.922   26.5    0.3   234   20.8 
2026-06-18 00:00 UT   04 07 20.0   +08 59 11    83.823   82.922   27.3    0.3   235   20.8 
2026-06-19 00:00 UT   04 07 23.0   +08 59 16    83.816   82.921   28.2    0.3   236   20.8 
2026-06-20 00:00 UT   04 07 25.9   +08 59 21    83.808   82.920   29.0    0.3   237   20.8 
2026-06-21 00:00 UT   04 07 28.8   +08 59 26    83.799   82.920   29.9    0.3   238   20.8 
2026-06-22 00:00 UT   04 07 31.7   +08 59 30    83.791   82.919   30.8    0.4   239   20.8 
2026-06-23 00:00 UT   04 07 34.6   +08 59 35    83.782   82.918   31.6    0.4   239   20.8 
2026-06-24 00:00 UT   04 07 37.4   +08 59 39    83.773   82.918   32.5    0.4   240   20.8 
2026-06-25 00:00 UT   04 07 40.2   +08 59 43    83.764   82.917   33.4    0.4   241   20.8 
2026-06-26 00:00 UT   04 07 43.0   +08 59 46    83.755   82.916   34.2    0.4   241   20.8 
2026-06-27 00:00 UT   04 07 45.8   +08 59 50    83.745   82.915   35.1    0.4   242   20.8 
2026-06-28 00:00 UT   04 07 48.6   +08 59 53    83.735   82.915   36.0    0.4   242   20.8 
2026-06-29 00:00 UT   04 07 51.3   +08 59 56    83.725   82.914   36.9    0.4   243   20.8 
2026-06-30 00:00 UT   04 07 54.0   +08 59 59    83.715   82.913   37.8    0.4   243   20.8 
2026-07-01 00:00 UT   04 07 56.7   +09 00 02    83.704   82.913   38.7    0.4   244   20.8 
2026-07-02 00:00 UT   04 07 59.4   +09 00 05    83.693   82.912   39.6    0.4   244   20.8 
2026-07-03 00:00 UT   04 08 02.0   +09 00 07    83.682   82.911   40.5    0.5   245   20.8 
2026-07-04 00:00 UT   04 08 04.6   +09 00 09    83.671   82.911   41.4    0.5   245   20.8 
2026-07-05 00:00 UT   04 08 07.2   +09 00 11    83.660   82.910   42.2    0.5   246   20.8 
2026-07-06 00:00 UT   04 08 09.7   +09 00 13    83.648   82.909   43.1    0.5   246   20.8 
2026-07-07 00:00 UT   04 08 12.3   +09 00 15    83.636   82.908   44.1    0.5   247   20.8 
2026-07-08 00:00 UT   04 08 14.7   +09 00 16    83.624   82.908   45.0    0.5   247   20.8 
2026-07-09 00:00 UT   04 08 17.2   +09 00 17    83.612   82.907   45.9    0.5   247   20.8 
2026-07-10 00:00 UT   04 08 19.6   +09 00 18    83.600   82.906   46.8    0.5   248   20.8 
2026-07-11 00:00 UT   04 08 22.0   +09 00 19    83.587   82.906   47.7    0.5   248   20.8 
2026-07-12 00:00 UT   04 08 24.4   +09 00 20    83.574   82.905   48.6    0.5   248   20.8 
2026-07-13 00:00 UT   04 08 26.7   +09 00 20    83.561   82.904   49.5    0.5   249   20.8 
2026-07-14 00:00 UT   04 08 29.0   +09 00 20    83.548   82.903   50.4    0.5   249   20.8 
2026-07-15 00:00 UT   04 08 31.3   +09 00 20    83.535   82.903   51.3    0.5   249   20.8 
2026-07-16 00:00 UT   04 08 33.5   +09 00 20    83.521   82.902   52.2    0.6   250   20.8 

    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.