(90377) Sedna
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	5 Nov 2025	20.7	82.875 AU	81.958 AU	04h07m	+08°44'	157.5°	0.3°
Opposition	23 Nov 2025	20.7	82.862 AU	81.896 AU	04h06m	+08°41'	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)                : 0.8613017
            a (Semimajor axis)              : 549.5551805
            i (Inclination)                 : 11.92592
            Ω (Longitude of ascending node) : 144.47858
            ω (Argument of perihelion)      : 311.01049
            M (Mean anomaly)                : 358.60730
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 96.10903
            B (Latitude of perihelion)      : -8.97094
            P (Orbital period in years)     : 12883.00            
        

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
2025-11-05 00:00 UT   04 07 42.7   +08 44 21    81.958   82.875  157.5    0.3   290   20.7 
2025-11-05 00:49 UT   04 07 42.7   +08 44 21    81.957   82.874  157.6    0.3   290   20.7 
2025-11-06 00:00 UT   04 07 40.4   +08 44 12    81.952   82.874  158.4    0.3   291   20.7 
2025-11-07 00:00 UT   04 07 38.1   +08 44 02    81.946   82.873  159.2    0.2   293   20.7 
2025-11-08 00:00 UT   04 07 35.8   +08 43 53    81.941   82.872  160.0    0.2   295   20.7 
2025-11-09 00:00 UT   04 07 33.4   +08 43 44    81.936   82.872  160.8    0.2   297   20.7 
2025-11-10 00:00 UT   04 07 31.1   +08 43 35    81.931   82.871  161.6    0.2   299   20.7 
2025-11-11 00:00 UT   04 07 28.7   +08 43 26    81.927   82.870  162.3    0.2   301   20.7 
2025-11-12 00:00 UT   04 07 26.3   +08 43 18    81.922   82.870  163.1    0.2   303   20.7 
2025-11-13 00:00 UT   04 07 23.9   +08 43 09    81.919   82.869  163.8    0.2   306   20.7 
2025-11-14 00:00 UT   04 07 21.4   +08 43 01    81.915   82.868  164.4    0.2   309   20.7 
2025-11-15 00:00 UT   04 07 19.0   +08 42 52    81.912   82.868  165.1    0.2   312   20.7 
2025-11-16 00:00 UT   04 07 16.5   +08 42 44    81.909   82.867  165.6    0.2   315   20.7 
2025-11-17 00:00 UT   04 07 14.1   +08 42 36    81.906   82.866  166.2    0.2   318   20.7 
2025-11-18 00:00 UT   04 07 11.6   +08 42 28    81.904   82.865  166.6    0.2   322   20.7 
2025-11-19 00:00 UT   04 07 09.2   +08 42 20    81.901   82.865  167.1    0.2   326   20.7 
2025-11-20 00:00 UT   04 07 06.7   +08 42 13    81.900   82.864  167.4    0.1   331   20.7 
2025-11-21 00:00 UT   04 07 04.2   +08 42 05    81.898   82.863  167.7    0.1   335   20.7 
2025-11-22 00:00 UT   04 07 01.7   +08 41 58    81.897   82.863  167.9    0.1   340   20.7 
2025-11-23 00:00 UT   04 06 59.2   +08 41 51    81.896   82.862  168.0    0.1   345   20.7 
2025-11-24 00:00 UT   04 06 56.7   +08 41 44    81.895   82.861  168.0    0.1   350   20.7 
2025-11-25 00:00 UT   04 06 54.2   +08 41 37    81.895   82.861  168.0    0.1   355   20.7 
2025-11-26 00:00 UT   04 06 51.7   +08 41 30    81.895   82.860  167.8    0.1   360   20.7 
2025-11-27 00:00 UT   04 06 49.2   +08 41 23    81.895   82.859  167.6    0.1     4   20.7 
2025-11-28 00:00 UT   04 06 46.7   +08 41 17    81.896   82.858  167.3    0.2     9   20.7 
2025-11-29 00:00 UT   04 06 44.2   +08 41 11    81.897   82.858  166.9    0.2    13   20.7 
2025-11-30 00:00 UT   04 06 41.7   +08 41 05    81.898   82.857  166.5    0.2    17   20.7 
2025-12-01 00:00 UT   04 06 39.3   +08 40 59    81.900   82.856  166.0    0.2    21   20.7 
2025-12-02 00:00 UT   04 06 36.8   +08 40 53    81.901   82.856  165.4    0.2    24   20.7 
2025-12-03 00:00 UT   04 06 34.3   +08 40 48    81.903   82.855  164.8    0.2    27   20.7 
2025-12-04 00:00 UT   04 06 31.8   +08 40 42    81.906   82.854  164.2    0.2    30   20.7 
2025-12-05 00:00 UT   04 06 29.4   +08 40 37    81.908   82.854  163.5    0.2    33   20.7 

    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.