(90377) Sedna
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Opposition	22 Nov 2025	20.7	83.232 AU	82.266 AU	04h03m	+08°30'	168.0°	0.1°
Today	22 Jan 2026	20.8	83.188 AU	82.726 AU	04h01m	+08°28'	117.7°	0.6°

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
2026-01-22 00:00 UT   04 01 25.3   +08 28 42    82.726   83.188  117.7    0.6    72   20.8 
2026-01-22 16:14 UT   04 01 24.5   +08 28 45    82.736   83.188  117.1    0.6    72   20.8 
2026-01-23 00:00 UT   04 01 24.2   +08 28 47    82.740   83.188  116.7    0.6    72   20.8 
2026-01-24 00:00 UT   04 01 23.2   +08 28 52    82.755   83.187  115.7    0.6    73   20.8 
2026-01-25 00:00 UT   04 01 22.2   +08 28 58    82.770   83.186  114.8    0.6    73   20.8 
2026-01-26 00:00 UT   04 01 21.3   +08 29 03    82.784   83.185  113.8    0.6    73   20.8 
2026-01-27 00:00 UT   04 01 20.4   +08 29 09    82.799   83.185  112.8    0.6    73   20.8 
2026-01-28 00:00 UT   04 01 19.5   +08 29 15    82.814   83.184  111.8    0.6    74   20.8 
2026-01-29 00:00 UT   04 01 18.8   +08 29 21    82.829   83.183  110.8    0.6    74   20.8 
2026-01-30 00:00 UT   04 01 18.0   +08 29 28    82.844   83.183  109.8    0.6    74   20.8 
2026-01-31 00:00 UT   04 01 17.3   +08 29 34    82.860   83.182  108.8    0.6    74   20.8 
2026-02-01 00:00 UT   04 01 16.7   +08 29 41    82.875   83.181  107.8    0.6    75   20.8 
2026-02-02 00:00 UT   04 01 16.0   +08 29 48    82.890   83.180  106.8    0.6    75   20.8 
2026-02-03 00:00 UT   04 01 15.5   +08 29 55    82.906   83.180  105.8    0.7    75   20.8 
2026-02-04 00:00 UT   04 01 15.0   +08 30 02    82.922   83.179  104.8    0.7    75   20.8 
2026-02-05 00:00 UT   04 01 14.5   +08 30 10    82.937   83.178  103.8    0.7    75   20.8 
2026-02-06 00:00 UT   04 01 14.1   +08 30 18    82.953   83.178  102.8    0.7    76   20.8 
2026-02-07 00:00 UT   04 01 13.7   +08 30 25    82.969   83.177  101.8    0.7    76   20.8 
2026-02-08 00:00 UT   04 01 13.4   +08 30 34    82.985   83.176  100.9    0.7    76   20.8 
2026-02-09 00:00 UT   04 01 13.1   +08 30 42    83.001   83.175   99.9    0.7    76   20.8 
2026-02-10 00:00 UT   04 01 12.9   +08 30 50    83.017   83.175   98.9    0.7    77   20.8 
2026-02-11 00:00 UT   04 01 12.7   +08 30 59    83.033   83.174   97.9    0.7    77   20.8 
2026-02-12 00:00 UT   04 01 12.6   +08 31 07    83.049   83.173   96.9    0.7    77   20.8 
2026-02-13 00:00 UT   04 01 12.5   +08 31 16    83.066   83.173   95.9    0.7    77   20.8 
2026-02-14 00:00 UT   04 01 12.5   +08 31 25    83.082   83.172   94.9    0.7    77   20.8 
2026-02-15 00:00 UT   04 01 12.5   +08 31 35    83.098   83.171   93.9    0.7    78   20.8 
2026-02-16 00:00 UT   04 01 12.6   +08 31 44    83.114   83.170   92.9    0.7    78   20.8 
2026-02-17 00:00 UT   04 01 12.7   +08 31 54    83.131   83.170   92.0    0.7    78   20.8 
2026-02-18 00:00 UT   04 01 12.9   +08 32 03    83.147   83.169   91.0    0.7    78   20.8 
2026-02-19 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 

    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.