(90377) Sedna
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	7 Mar 2026	20.8	82.994 AU	83.251 AU	04h02m	+08°40'	74.7°	0.7°
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
2026-03-07 00:00 UT   04 02 55.2   +08 40 17    83.251   82.994   74.7    0.7    82   20.8 
2026-03-07 17:42 UT   04 02 56.0   +08 40 25    83.263   82.994   74.0    0.7    82   20.8 
2026-03-08 00:00 UT   04 02 56.2   +08 40 28    83.267   82.994   73.7    0.7    82   20.8 
2026-03-09 00:00 UT   04 02 57.3   +08 40 40    83.282   82.993   72.7    0.7    82   20.8 
2026-03-10 00:00 UT   04 02 58.5   +08 40 53    83.298   82.992   71.8    0.7    82   20.8 
2026-03-11 00:00 UT   04 02 59.6   +08 41 05    83.313   82.991   70.8    0.6    83   20.8 
2026-03-12 00:00 UT   04 03 00.9   +08 41 17    83.328   82.991   69.8    0.6    83   20.8 
2026-03-13 00:00 UT   04 03 02.1   +08 41 29    83.343   82.990   68.9    0.6    83   20.8 
2026-03-14 00:00 UT   04 03 03.4   +08 41 42    83.358   82.989   67.9    0.6    83   20.8 
2026-03-15 00:00 UT   04 03 04.8   +08 41 54    83.373   82.989   66.9    0.6    84   20.8 
2026-03-16 00:00 UT   04 03 06.2   +08 42 07    83.388   82.988   66.0    0.6    84   20.8 
2026-03-17 00:00 UT   04 03 07.7   +08 42 19    83.403   82.987   65.0    0.6    84   20.8 
2026-03-18 00:00 UT   04 03 09.2   +08 42 32    83.418   82.986   64.0    0.6    84   20.8 
2026-03-19 00:00 UT   04 03 10.7   +08 42 45    83.432   82.986   63.1    0.6    85   20.8 
2026-03-20 00:00 UT   04 03 12.3   +08 42 58    83.446   82.985   62.1    0.6    85   20.8 
2026-03-21 00:00 UT   04 03 13.9   +08 43 10    83.461   82.984   61.2    0.6    85   20.8 
2026-03-22 00:00 UT   04 03 15.6   +08 43 23    83.475   82.984   60.2    0.6    85   20.8 
2026-03-23 00:00 UT   04 03 17.3   +08 43 36    83.489   82.983   59.2    0.6    86   20.8 
2026-03-24 00:00 UT   04 03 19.0   +08 43 49    83.502   82.982   58.3    0.6    86   20.8 
2026-03-25 00:00 UT   04 03 20.8   +08 44 02    83.516   82.982   57.3    0.6    86   20.8 
2026-03-26 00:00 UT   04 03 22.7   +08 44 15    83.529   82.981   56.4    0.6    87   20.8 
2026-03-27 00:00 UT   04 03 24.6   +08 44 29    83.543   82.980   55.4    0.6    87   20.8 
2026-03-28 00:00 UT   04 03 26.5   +08 44 42    83.556   82.979   54.5    0.6    87   20.8 
2026-03-29 00:00 UT   04 03 28.4   +08 44 55    83.569   82.979   53.5    0.6    87   20.8 
2026-03-30 00:00 UT   04 03 30.4   +08 45 08    83.581   82.978   52.6    0.5    88   20.8 
2026-03-31 00:00 UT   04 03 32.5   +08 45 21    83.594   82.977   51.6    0.5    88   20.8 
2026-04-01 00:00 UT   04 03 34.5   +08 45 34    83.606   82.977   50.7    0.5    88   20.8 
2026-04-02 00:00 UT   04 03 36.7   +08 45 48    83.618   82.976   49.7    0.5    89   20.8 
2026-04-03 00:00 UT   04 03 38.8   +08 46 01    83.631   82.975   48.8    0.5    89   20.8 
2026-04-04 00:00 UT   04 03 41.0   +08 46 14    83.642   82.974   47.9    0.5    89   20.8 
2026-04-05 00:00 UT   04 03 43.2   +08 46 27    83.654   82.974   46.9    0.5    90   20.8 
2026-04-06 00:00 UT   04 03 45.5   +08 46 41    83.665   82.973   46.0    0.5    90   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.