(90377) Sedna
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	22 May 2026	20.8	82.941 AU	83.932 AU	04h05m	+08°55'	11.7°	0.1°
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
2026-05-22 00:00 UT   04 05 56.2   +08 55 50    83.932   82.941   11.7    0.1   166   20.8 
2026-05-22 17:00 UT   04 05 58.4   +08 55 57    83.932   82.940   11.7    0.1   169   20.8 
2026-05-23 00:00 UT   04 05 59.4   +08 55 59    83.931   82.940   11.7    0.1   170   20.8 
2026-05-24 00:00 UT   04 06 02.5   +08 56 09    83.931   82.939   11.8    0.1   175   20.8 
2026-05-25 00:00 UT   04 06 05.7   +08 56 18    83.930   82.939   11.9    0.1   180   20.8 
2026-05-26 00:00 UT   04 06 08.9   +08 56 27    83.928   82.938   12.1    0.1   184   20.8 
2026-05-27 00:00 UT   04 06 12.0   +08 56 36    83.927   82.937   12.4    0.2   188   20.8 
2026-05-28 00:00 UT   04 06 15.2   +08 56 45    83.925   82.936   12.7    0.2   192   20.8 
2026-05-29 00:00 UT   04 06 18.4   +08 56 53    83.923   82.936   13.1    0.2   196   20.8 
2026-05-30 00:00 UT   04 06 21.5   +08 57 02    83.920   82.935   13.6    0.2   200   20.8 
2026-05-31 00:00 UT   04 06 24.7   +08 57 10    83.918   82.934   14.1    0.2   203   20.8 
2026-06-01 00:00 UT   04 06 27.8   +08 57 18    83.915   82.934   14.6    0.2   206   20.8 
2026-06-02 00:00 UT   04 06 31.0   +08 57 26    83.911   82.933   15.2    0.2   209   20.8 
2026-06-03 00:00 UT   04 06 34.1   +08 57 34    83.908   82.932   15.8    0.2   212   20.8 
2026-06-04 00:00 UT   04 06 37.2   +08 57 42    83.904   82.932   16.5    0.2   214   20.8 
2026-06-05 00:00 UT   04 06 40.4   +08 57 49    83.900   82.931   17.1    0.2   217   20.8 
2026-06-06 00:00 UT   04 06 43.5   +08 57 57    83.896   82.930   17.8    0.2   219   20.8 
2026-06-07 00:00 UT   04 06 46.6   +08 58 04    83.891   82.929   18.6    0.2   221   20.8 
2026-06-08 00:00 UT   04 06 49.7   +08 58 11    83.886   82.929   19.3    0.2   223   20.8 
2026-06-09 00:00 UT   04 06 52.8   +08 58 18    83.881   82.928   20.0    0.2   224   20.8 
2026-06-10 00:00 UT   04 06 55.9   +08 58 25    83.876   82.927   20.8    0.2   226   20.8 
2026-06-11 00:00 UT   04 06 58.9   +08 58 31    83.870   82.927   21.6    0.3   227   20.8 
2026-06-12 00:00 UT   04 07 02.0   +08 58 37    83.864   82.926   22.4    0.3   229   20.8 
2026-06-13 00:00 UT   04 07 05.0   +08 58 44    83.858   82.925   23.2    0.3   230   20.8 
2026-06-14 00:00 UT   04 07 08.0   +08 58 49    83.852   82.925   24.0    0.3   231   20.8 
2026-06-15 00:00 UT   04 07 11.1   +08 58 55    83.845   82.924   24.8    0.3   232   20.8 
2026-06-16 00:00 UT   04 07 14.1   +08 59 01    83.838   82.923   25.7    0.3   233   20.8 
2026-06-17 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 

    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.