(90377) Sedna
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	18 Feb 2026	20.8	83.169 AU	83.147 AU	04h01m	+08°32'	91.0°	0.7°
Opposition	23 Nov 2026	20.7	82.972 AU	82.006 AU	04h05m	+08°38'	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)                : 0.8612998
            a (Semimajor axis)              : 549.5480838
            i (Inclination)                 : 11.92592
            Ω (Longitude of ascending node) : 144.47861
            ω (Argument of perihelion)      : 311.01037
            M (Mean anomaly)                : 358.60728
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 96.10894
            B (Latitude of perihelion)      : -8.97096
            P (Orbital period in years)     : 12882.75            
        

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
2026-02-18 00:00 UT   04 01 12.9   +08 32 03    83.147   83.169   91.0    0.7    78   20.8 
2026-02-18 10:54 UT   04 01 13.0   +08 32 08    83.154   83.169   90.5    0.7    78   20.8 
2026-02-19 00:00 UT   04 01 13.1   +08 32 13    83.163   83.168   90.0    0.7    78   20.8 
2026-02-20 00:00 UT   04 01 13.4   +08 32 23    83.179   83.168   89.0    0.7    79   20.8 
2026-02-21 00:00 UT   04 01 13.7   +08 32 33    83.196   83.167   88.0    0.7    79   20.8 
2026-02-22 00:00 UT   04 01 14.1   +08 32 44    83.212   83.166   87.0    0.7    79   20.8 
2026-02-23 00:00 UT   04 01 14.5   +08 32 54    83.228   83.165   86.0    0.7    79   20.8 
2026-02-24 00:00 UT   04 01 15.0   +08 33 05    83.244   83.165   85.1    0.7    79   20.8 
2026-02-25 00:00 UT   04 01 15.5   +08 33 15    83.261   83.164   84.1    0.7    80   20.8 
2026-02-26 00:00 UT   04 01 16.1   +08 33 26    83.277   83.163   83.1    0.7    80   20.8 
2026-02-27 00:00 UT   04 01 16.7   +08 33 37    83.293   83.163   82.1    0.7    80   20.8 
2026-02-28 00:00 UT   04 01 17.3   +08 33 48    83.309   83.162   81.1    0.7    80   20.8 
2026-03-01 00:00 UT   04 01 18.1   +08 33 59    83.325   83.161   80.2    0.7    80   20.8 
2026-03-02 00:00 UT   04 01 18.8   +08 34 11    83.341   83.160   79.2    0.7    81   20.8 
2026-03-03 00:00 UT   04 01 19.6   +08 34 22    83.357   83.160   78.2    0.7    81   20.8 
2026-03-04 00:00 UT   04 01 20.5   +08 34 34    83.373   83.159   77.2    0.7    81   20.8 
2026-03-05 00:00 UT   04 01 21.4   +08 34 45    83.389   83.158   76.3    0.7    81   20.8 
2026-03-06 00:00 UT   04 01 22.4   +08 34 57    83.404   83.158   75.3    0.7    82   20.8 
2026-03-07 00:00 UT   04 01 23.4   +08 35 09    83.420   83.157   74.3    0.7    82   20.8 
2026-03-08 00:00 UT   04 01 24.4   +08 35 21    83.436   83.156   73.3    0.7    82   20.8 
2026-03-09 00:00 UT   04 01 25.5   +08 35 33    83.451   83.155   72.4    0.7    82   20.8 
2026-03-10 00:00 UT   04 01 26.6   +08 35 45    83.467   83.155   71.4    0.6    82   20.8 
2026-03-11 00:00 UT   04 01 27.8   +08 35 57    83.482   83.154   70.4    0.6    83   20.8 
2026-03-12 00:00 UT   04 01 29.1   +08 36 09    83.497   83.153   69.5    0.6    83   20.8 
2026-03-13 00:00 UT   04 01 30.4   +08 36 22    83.512   83.153   68.5    0.6    83   20.8 
2026-03-14 00:00 UT   04 01 31.7   +08 36 34    83.527   83.152   67.5    0.6    83   20.8 
2026-03-15 00:00 UT   04 01 33.1   +08 36 47    83.542   83.151   66.6    0.6    84   20.8 
2026-03-16 00:00 UT   04 01 34.5   +08 36 59    83.557   83.151   65.6    0.6    84   20.8 
2026-03-17 00:00 UT   04 01 35.9   +08 37 12    83.572   83.150   64.6    0.6    84   20.8 
2026-03-18 00:00 UT   04 01 37.4   +08 37 25    83.586   83.149   63.7    0.6    84   20.8 
2026-03-19 00:00 UT   04 01 39.0   +08 37 38    83.601   83.148   62.7    0.6    85   20.8 
2026-03-20 00:00 UT   04 01 40.6   +08 37 51    83.615   83.148   61.7    0.6    85   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.