(90377) Sedna
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	15 Nov 2025	20.7	83.281 AU	82.323 AU	04h03m	+08°29'	165.6°	0.2°
Opposition	22 Nov 2025	20.7	83.276 AU	82.310 AU	04h03m	+08°28'	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)                : 0.8613011
            a (Semimajor axis)              : 549.5528783
            i (Inclination)                 : 11.92592
            Ω (Longitude of ascending node) : 144.47859
            ω (Argument of perihelion)      : 311.01043
            M (Mean anomaly)                : 358.60729
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 96.10898
            B (Latitude of perihelion)      : -8.97095
            P (Orbital period in years)     : 12882.92            
        

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
2025-11-15 00:00 UT   04 03 21.0   +08 29 47    82.323   83.281  165.6    0.2   315   20.7 
2025-11-15 05:36 UT   04 03 20.5   +08 29 45    82.322   83.281  165.8    0.2   315   20.7 
2025-11-16 00:00 UT   04 03 18.6   +08 29 38    82.320   83.280  166.2    0.2   318   20.7 
2025-11-17 00:00 UT   04 03 16.2   +08 29 30    82.317   83.279  166.6    0.2   322   20.7 
2025-11-18 00:00 UT   04 03 13.7   +08 29 22    82.315   83.279  167.0    0.2   326   20.7 
2025-11-19 00:00 UT   04 03 11.2   +08 29 14    82.314   83.278  167.4    0.1   330   20.7 
2025-11-20 00:00 UT   04 03 08.8   +08 29 07    82.312   83.277  167.7    0.1   335   20.7 
2025-11-21 00:00 UT   04 03 06.3   +08 28 59    82.311   83.277  167.9    0.1   340   20.7 
2025-11-22 00:00 UT   04 03 03.8   +08 28 52    82.310   83.276  168.0    0.1   345   20.7 
2025-11-23 00:00 UT   04 03 01.3   +08 28 44    82.309   83.275  168.0    0.1   349   20.7 
2025-11-24 00:00 UT   04 02 58.9   +08 28 37    82.309   83.274  167.9    0.1   354   20.7 
2025-11-25 00:00 UT   04 02 56.4   +08 28 30    82.309   83.274  167.8    0.1   359   20.7 
2025-11-26 00:00 UT   04 02 53.9   +08 28 24    82.309   83.273  167.6    0.1     4   20.7 
2025-11-27 00:00 UT   04 02 51.4   +08 28 17    82.310   83.272  167.3    0.1     8   20.7 
2025-11-28 00:00 UT   04 02 48.9   +08 28 10    82.311   83.272  166.9    0.2    13   20.7 
2025-11-29 00:00 UT   04 02 46.5   +08 28 04    82.312   83.271  166.5    0.2    17   20.7 
2025-11-30 00:00 UT   04 02 44.0   +08 27 58    82.313   83.270  166.0    0.2    20   20.7 
2025-12-01 00:00 UT   04 02 41.5   +08 27 52    82.315   83.269  165.4    0.2    24   20.7 
2025-12-02 00:00 UT   04 02 39.1   +08 27 46    82.317   83.269  164.8    0.2    27   20.7 
2025-12-03 00:00 UT   04 02 36.6   +08 27 41    82.320   83.268  164.2    0.2    30   20.7 
2025-12-04 00:00 UT   04 02 34.2   +08 27 35    82.322   83.267  163.5    0.2    33   20.7 
2025-12-05 00:00 UT   04 02 31.7   +08 27 30    82.325   83.267  162.8    0.2    35   20.7 
2025-12-06 00:00 UT   04 02 29.3   +08 27 25    82.328   83.266  162.0    0.2    38   20.7 
2025-12-07 00:00 UT   04 02 26.9   +08 27 20    82.332   83.265  161.3    0.2    40   20.7 
2025-12-08 00:00 UT   04 02 24.5   +08 27 15    82.336   83.264  160.5    0.2    42   20.7 
2025-12-09 00:00 UT   04 02 22.1   +08 27 11    82.340   83.264  159.6    0.2    44   20.7 
2025-12-10 00:00 UT   04 02 19.7   +08 27 07    82.344   83.263  158.8    0.2    45   20.7 
2025-12-11 00:00 UT   04 02 17.3   +08 27 03    82.349   83.262  158.0    0.3    47   20.7 
2025-12-12 00:00 UT   04 02 14.9   +08 26 59    82.354   83.262  157.1    0.3    48   20.7 
2025-12-13 00:00 UT   04 02 12.6   +08 26 55    82.359   83.261  156.2    0.3    50   20.7 
2025-12-14 00:00 UT   04 02 10.3   +08 26 51    82.365   83.260  155.4    0.3    51   20.8 
2025-12-15 00:00 UT   04 02 08.0   +08 26 48    82.371   83.259  154.5    0.3    52   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.