(90377) Sedna
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Opposition	22 Nov 2025	20.7	83.259 AU	82.293 AU	04h03m	+08°29'	168.0°	0.1°
Today	12 Jan 2026	20.8	83.223 AU	82.620 AU	04h01m	+08°27'	127.6°	0.5°

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)                : 0.8613006
            a (Semimajor axis)              : 549.5510676
            i (Inclination)                 : 11.92592
            Ω (Longitude of ascending node) : 144.47860
            ω (Argument of perihelion)      : 311.01040
            M (Mean anomaly)                : 358.60729
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 96.10896
            B (Latitude of perihelion)      : -8.97095
            P (Orbital period in years)     : 12882.85            
        

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
2026-01-12 00:00 UT   04 01 22.8   +08 27 12    82.620   83.223  127.6    0.5    69   20.8 
2026-01-12 06:38 UT   04 01 22.4   +08 27 13    82.623   83.223  127.3    0.5    69   20.8 
2026-01-13 00:00 UT   04 01 21.4   +08 27 15    82.632   83.222  126.6    0.5    69   20.8 
2026-01-14 00:00 UT   04 01 19.9   +08 27 18    82.645   83.221  125.6    0.6    70   20.8 
2026-01-15 00:00 UT   04 01 18.5   +08 27 22    82.658   83.221  124.6    0.6    70   20.8 
2026-01-16 00:00 UT   04 01 17.2   +08 27 25    82.671   83.220  123.6    0.6    70   20.8 
2026-01-17 00:00 UT   04 01 15.8   +08 27 29    82.685   83.219  122.6    0.6    71   20.8 
2026-01-18 00:00 UT   04 01 14.6   +08 27 33    82.698   83.218  121.6    0.6    71   20.8 
2026-01-19 00:00 UT   04 01 13.3   +08 27 37    82.712   83.218  120.6    0.6    71   20.8 
2026-01-20 00:00 UT   04 01 12.1   +08 27 41    82.726   83.217  119.7    0.6    71   20.8 
2026-01-21 00:00 UT   04 01 11.0   +08 27 46    82.740   83.216  118.7    0.6    72   20.8 
2026-01-22 00:00 UT   04 01 09.9   +08 27 51    82.754   83.216  117.7    0.6    72   20.8 
2026-01-23 00:00 UT   04 01 08.8   +08 27 56    82.769   83.215  116.7    0.6    72   20.8 
2026-01-24 00:00 UT   04 01 07.8   +08 28 01    82.783   83.214  115.7    0.6    73   20.8 
2026-01-25 00:00 UT   04 01 06.8   +08 28 06    82.798   83.213  114.7    0.6    73   20.8 
2026-01-26 00:00 UT   04 01 05.9   +08 28 12    82.813   83.213  113.7    0.6    73   20.8 
2026-01-27 00:00 UT   04 01 05.0   +08 28 18    82.827   83.212  112.7    0.6    73   20.8 
2026-01-28 00:00 UT   04 01 04.2   +08 28 24    82.842   83.211  111.7    0.6    74   20.8 
2026-01-29 00:00 UT   04 01 03.4   +08 28 30    82.857   83.211  110.7    0.6    74   20.8 
2026-01-30 00:00 UT   04 01 02.7   +08 28 36    82.873   83.210  109.7    0.6    74   20.8 
2026-01-31 00:00 UT   04 01 02.0   +08 28 43    82.888   83.209  108.7    0.6    74   20.8 
2026-02-01 00:00 UT   04 01 01.3   +08 28 50    82.903   83.208  107.7    0.6    75   20.8 
2026-02-02 00:00 UT   04 01 00.7   +08 28 56    82.919   83.208  106.7    0.6    75   20.8 
2026-02-03 00:00 UT   04 01 00.2   +08 29 04    82.934   83.207  105.8    0.7    75   20.8 
2026-02-04 00:00 UT   04 00 59.6   +08 29 11    82.950   83.206  104.8    0.7    75   20.8 
2026-02-05 00:00 UT   04 00 59.2   +08 29 18    82.966   83.206  103.8    0.7    75   20.8 
2026-02-06 00:00 UT   04 00 58.8   +08 29 26    82.982   83.205  102.8    0.7    76   20.8 
2026-02-07 00:00 UT   04 00 58.4   +08 29 34    82.997   83.204  101.8    0.7    76   20.8 
2026-02-08 00:00 UT   04 00 58.1   +08 29 42    83.013   83.203  100.8    0.7    76   20.8 
2026-02-09 00:00 UT   04 00 57.8   +08 29 50    83.029   83.203   99.8    0.7    76   20.8 
2026-02-10 00:00 UT   04 00 57.6   +08 29 59    83.045   83.202   98.8    0.7    76   20.8 
2026-02-11 00:00 UT   04 00 57.4   +08 30 07    83.062   83.201   97.8    0.7    77   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.