(90377) Sedna
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	5 Jul 2026	20.8	82.910 AU	83.660 AU	04h08m	+09°00'	42.2°	0.5°
Opposition	23 Nov 2026	20.7	82.811 AU	81.845 AU	04h07m	+08°43'	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)                : 0.8612949
            a (Semimajor axis)              : 549.5301384
            i (Inclination)                 : 11.92592
            Ω (Longitude of ascending node) : 144.47863
            ω (Argument of perihelion)      : 311.00992
            M (Mean anomaly)                : 358.60722
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 96.10851
            B (Latitude of perihelion)      : -8.97102
            P (Orbital period in years)     : 12882.12            
        

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
2026-07-05 00:00 UT   04 08 07.2   +09 00 11    83.660   82.910   42.2    0.5   246   20.8 
2026-07-05 19:40 UT   04 08 09.3   +09 00 13    83.650   82.909   43.0    0.5   246   20.8 
2026-07-06 00:00 UT   04 08 09.7   +09 00 13    83.648   82.909   43.1    0.5   246   20.8 
2026-07-07 00:00 UT   04 08 12.3   +09 00 15    83.636   82.908   44.1    0.5   247   20.8 
2026-07-08 00:00 UT   04 08 14.7   +09 00 16    83.624   82.908   45.0    0.5   247   20.8 
2026-07-09 00:00 UT   04 08 17.2   +09 00 17    83.612   82.907   45.9    0.5   247   20.8 
2026-07-10 00:00 UT   04 08 19.6   +09 00 18    83.600   82.906   46.8    0.5   248   20.8 
2026-07-11 00:00 UT   04 08 22.0   +09 00 19    83.587   82.906   47.7    0.5   248   20.8 
2026-07-12 00:00 UT   04 08 24.4   +09 00 20    83.574   82.905   48.6    0.5   248   20.8 
2026-07-13 00:00 UT   04 08 26.7   +09 00 20    83.561   82.904   49.5    0.5   249   20.8 
2026-07-14 00:00 UT   04 08 29.0   +09 00 20    83.548   82.903   50.4    0.5   249   20.8 
2026-07-15 00:00 UT   04 08 31.3   +09 00 20    83.535   82.903   51.3    0.5   249   20.8 
2026-07-16 00:00 UT   04 08 33.5   +09 00 20    83.521   82.902   52.2    0.6   250   20.8 
2026-07-17 00:00 UT   04 08 35.7   +09 00 20    83.507   82.901   53.1    0.6   250   20.8 
2026-07-18 00:00 UT   04 08 37.9   +09 00 19    83.494   82.901   54.1    0.6   250   20.8 
2026-07-19 00:00 UT   04 08 40.0   +09 00 19    83.479   82.900   55.0    0.6   251   20.8 
2026-07-20 00:00 UT   04 08 42.1   +09 00 18    83.465   82.899   55.9    0.6   251   20.8 
2026-07-21 00:00 UT   04 08 44.2   +09 00 16    83.451   82.899   56.8    0.6   251   20.8 
2026-07-22 00:00 UT   04 08 46.2   +09 00 15    83.436   82.898   57.7    0.6   252   20.8 
2026-07-23 00:00 UT   04 08 48.2   +09 00 14    83.422   82.897   58.6    0.6   252   20.8 
2026-07-24 00:00 UT   04 08 50.1   +09 00 12    83.407   82.896   59.6    0.6   252   20.8 
2026-07-25 00:00 UT   04 08 52.0   +09 00 10    83.392   82.896   60.5    0.6   252   20.8 
2026-07-26 00:00 UT   04 08 53.9   +09 00 08    83.377   82.895   61.4    0.6   253   20.8 
2026-07-27 00:00 UT   04 08 55.7   +09 00 06    83.361   82.894   62.3    0.6   253   20.8 
2026-07-28 00:00 UT   04 08 57.5   +09 00 03    83.346   82.894   63.2    0.6   253   20.8 
2026-07-29 00:00 UT   04 08 59.2   +09 00 00    83.331   82.893   64.2    0.6   253   20.8 
2026-07-30 00:00 UT   04 09 00.9   +08 59 58    83.315   82.892   65.1    0.6   254   20.8 
2026-07-31 00:00 UT   04 09 02.6   +08 59 55    83.299   82.892   66.0    0.6   254   20.8 
2026-08-01 00:00 UT   04 09 04.2   +08 59 51    83.283   82.891   66.9    0.6   254   20.8 
2026-08-02 00:00 UT   04 09 05.8   +08 59 48    83.267   82.890   67.9    0.6   254   20.8 
2026-08-03 00:00 UT   04 09 07.3   +08 59 45    83.251   82.889   68.8    0.7   254   20.8 
2026-08-04 00:00 UT   04 09 08.8   +08 59 41    83.235   82.889   69.7    0.7   255   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.