(90377) Sedna
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	19 Apr 2026	20.8	82.964 AU	83.795 AU	04h04m	+08°49'	34.0°	0.4°
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
2026-04-19 00:00 UT   04 04 17.7   +08 49 31    83.795   82.964   34.0    0.4    97   20.8 
2026-04-19 12:26 UT   04 04 19.1   +08 49 37    83.799   82.964   33.6    0.4    97   20.8 
2026-04-20 00:00 UT   04 04 20.4   +08 49 44    83.803   82.963   33.1    0.4    97   20.8 
2026-04-21 00:00 UT   04 04 23.1   +08 49 56    83.811   82.963   32.2    0.4    98   20.8 
2026-04-22 00:00 UT   04 04 25.9   +08 50 09    83.819   82.962   31.4    0.4    99   20.8 
2026-04-23 00:00 UT   04 04 28.6   +08 50 22    83.826   82.961   30.5    0.4    99   20.8 
2026-04-24 00:00 UT   04 04 31.4   +08 50 34    83.834   82.960   29.6    0.3   100   20.8 
2026-04-25 00:00 UT   04 04 34.2   +08 50 47    83.841   82.960   28.7    0.3   101   20.8 
2026-04-26 00:00 UT   04 04 37.1   +08 50 59    83.848   82.959   27.8    0.3   102   20.8 
2026-04-27 00:00 UT   04 04 39.9   +08 51 12    83.854   82.958   27.0    0.3   103   20.8 
2026-04-28 00:00 UT   04 04 42.8   +08 51 24    83.860   82.958   26.1    0.3   104   20.8 
2026-04-29 00:00 UT   04 04 45.7   +08 51 36    83.867   82.957   25.3    0.3   105   20.8 
2026-04-30 00:00 UT   04 04 48.6   +08 51 48    83.872   82.956   24.4    0.3   106   20.8 
2026-05-01 00:00 UT   04 04 51.5   +08 52 01    83.878   82.955   23.6    0.3   107   20.8 
2026-05-02 00:00 UT   04 04 54.5   +08 52 13    83.883   82.955   22.8    0.3   108   20.8 
2026-05-03 00:00 UT   04 04 57.4   +08 52 24    83.888   82.954   22.0    0.3   110   20.8 
2026-05-04 00:00 UT   04 05 00.4   +08 52 36    83.893   82.953   21.2    0.3   111   20.8 
2026-05-05 00:00 UT   04 05 03.4   +08 52 48    83.897   82.953   20.4    0.2   113   20.8 
2026-05-06 00:00 UT   04 05 06.5   +08 52 60    83.902   82.952   19.6    0.2   114   20.8 
2026-05-07 00:00 UT   04 05 09.5   +08 53 11    83.906   82.951   18.9    0.2   116   20.8 
2026-05-08 00:00 UT   04 05 12.5   +08 53 22    83.909   82.951   18.1    0.2   118   20.8 
2026-05-09 00:00 UT   04 05 15.6   +08 53 34    83.913   82.950   17.4    0.2   120   20.8 
2026-05-10 00:00 UT   04 05 18.7   +08 53 45    83.916   82.949   16.7    0.2   122   20.8 
2026-05-11 00:00 UT   04 05 21.7   +08 53 56    83.919   82.948   16.1    0.2   125   20.8 
2026-05-12 00:00 UT   04 05 24.8   +08 54 07    83.921   82.948   15.4    0.2   127   20.8 
2026-05-13 00:00 UT   04 05 27.9   +08 54 18    83.924   82.947   14.8    0.2   130   20.8 
2026-05-14 00:00 UT   04 05 31.1   +08 54 29    83.926   82.946   14.3    0.2   133   20.8 
2026-05-15 00:00 UT   04 05 34.2   +08 54 39    83.927   82.946   13.8    0.2   137   20.8 
2026-05-16 00:00 UT   04 05 37.3   +08 54 50    83.929   82.945   13.3    0.2   140   20.8 
2026-05-17 00:00 UT   04 05 40.4   +08 55 00    83.930   82.944   12.9    0.2   144   20.8 
2026-05-18 00:00 UT   04 05 43.6   +08 55 10    83.931   82.944   12.5    0.2   148   20.8 
2026-05-19 00:00 UT   04 05 46.7   +08 55 20    83.932   82.943   12.2    0.1   152   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.