(90377) Sedna
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	4 Oct 2026	20.8	82.785 AU	82.176 AU	04h09m	+08°53'	127.3°	0.6°
Opposition	23 Nov 2026	20.7	82.750 AU	81.784 AU	04h08m	+08°45'	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)                : 0.8598806
            a (Semimajor axis)              : 543.7115274
            i (Inclination)                 : 11.92528
            Ω (Longitude of ascending node) : 144.50580
            ω (Argument of perihelion)      : 311.09926
            M (Mean anomaly)                : 358.59566
            Epoch                           : 2026 Jun 09

            L (Longitude of perihelion)     : 96.22520
            B (Latitude of perihelion)      : -8.95827
            P (Orbital period in years)     : 12678.06            
        

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
2026-10-04 00:00 UT   04 09 48.3   +08 53 26    82.176   82.785  127.3    0.6   268   20.8 
2026-10-04 02:15 UT   04 09 48.1   +08 53 25    82.174   82.785  127.4    0.6   268   20.8 
2026-10-05 00:00 UT   04 09 46.9   +08 53 16    82.162   82.785  128.2    0.5   269   20.8 
2026-10-06 00:00 UT   04 09 45.6   +08 53 05    82.149   82.784  129.2    0.5   269   20.8 
2026-10-07 00:00 UT   04 09 44.1   +08 52 55    82.135   82.783  130.2    0.5   269   20.8 
2026-10-08 00:00 UT   04 09 42.7   +08 52 44    82.122   82.782  131.1    0.5   270   20.8 
2026-10-09 00:00 UT   04 09 41.2   +08 52 33    82.109   82.782  132.1    0.5   270   20.8 
2026-10-10 00:00 UT   04 09 39.7   +08 52 23    82.097   82.781  133.0    0.5   271   20.8 
2026-10-11 00:00 UT   04 09 38.1   +08 52 12    82.084   82.780  134.0    0.5   271   20.8 
2026-10-12 00:00 UT   04 09 36.5   +08 52 01    82.072   82.780  134.9    0.5   271   20.8 
2026-10-13 00:00 UT   04 09 34.9   +08 51 51    82.060   82.779  135.9    0.5   272   20.8 
2026-10-14 00:00 UT   04 09 33.2   +08 51 40    82.048   82.778  136.8    0.5   272   20.8 
2026-10-15 00:00 UT   04 09 31.5   +08 51 30    82.037   82.778  137.8    0.5   273   20.8 
2026-10-16 00:00 UT   04 09 29.8   +08 51 19    82.025   82.777  138.7    0.5   273   20.8 
2026-10-17 00:00 UT   04 09 28.0   +08 51 08    82.014   82.776  139.7    0.4   274   20.8 
2026-10-18 00:00 UT   04 09 26.2   +08 50 58    82.003   82.776  140.6    0.4   274   20.8 
2026-10-19 00:00 UT   04 09 24.4   +08 50 47    81.992   82.775  141.6    0.4   275   20.7 
2026-10-20 00:00 UT   04 09 22.5   +08 50 37    81.982   82.774  142.5    0.4   275   20.7 
2026-10-21 00:00 UT   04 09 20.6   +08 50 27    81.972   82.773  143.5    0.4   276   20.7 
2026-10-22 00:00 UT   04 09 18.6   +08 50 16    81.962   82.773  144.4    0.4   276   20.7 
2026-10-23 00:00 UT   04 09 16.7   +08 50 06    81.952   82.772  145.3    0.4   277   20.7 
2026-10-24 00:00 UT   04 09 14.7   +08 49 56    81.943   82.771  146.3    0.4   278   20.7 
2026-10-25 00:00 UT   04 09 12.7   +08 49 45    81.933   82.771  147.2    0.4   278   20.7 
2026-10-26 00:00 UT   04 09 10.6   +08 49 35    81.924   82.770  148.1    0.4   279   20.7 
2026-10-27 00:00 UT   04 09 08.6   +08 49 25    81.916   82.769  149.0    0.4   280   20.7 
2026-10-28 00:00 UT   04 09 06.5   +08 49 15    81.907   82.769  150.0    0.3   281   20.7 
2026-10-29 00:00 UT   04 09 04.3   +08 49 05    81.899   82.768  150.9    0.3   281   20.7 
2026-10-30 00:00 UT   04 09 02.2   +08 48 55    81.891   82.767  151.8    0.3   282   20.7 
2026-10-31 00:00 UT   04 09 00.0   +08 48 45    81.883   82.766  152.7    0.3   283   20.7 
2026-11-01 00:00 UT   04 08 57.8   +08 48 35    81.876   82.766  153.6    0.3   284   20.7 
2026-11-02 00:00 UT   04 08 55.6   +08 48 26    81.869   82.765  154.5    0.3   285   20.7 
2026-11-03 00:00 UT   04 08 53.4   +08 48 16    81.862   82.764  155.4    0.3   287   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.