(90377) Sedna
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	30 May 2023	20.8	83.783 AU	84.764 AU	03h58m	+08°30'	14.6°	0.2°
Opposition	22 Nov 2023	20.8	83.655 AU	82.689 AU	03h59m	+08°16'	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)                : 0.8565261
            a (Semimajor axis)              : 532.3723510
            i (Inclination)                 : 11.93034
            Ω (Longitude of ascending node) : 144.25836
            ω (Argument of perihelion)      : 310.87040
            M (Mean anomaly)                : 358.46965
            Epoch                           : 2023 Feb 25

            L (Longitude of perihelion)     : 95.74878
            B (Latitude of perihelion)      : -8.99346
            P (Orbital period in years)     : 12283.53            
        

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. A more printer-friendly version of the same chart can be found below.

Ephemerides:

Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2023-05-30 00:00 UT   03 58 32.0   +08 30 46    84.764   83.783   14.6    0.2   205   20.8 
2023-05-30 04:06 UT   03 58 32.6   +08 30 48    84.764   83.783   14.7    0.2   206   20.8 
2023-05-31 00:00 UT   03 58 35.2   +08 30 55    84.761   83.783   15.2    0.2   208   20.8 
2023-06-01 00:00 UT   03 58 38.2   +08 31 03    84.757   83.782   15.8    0.2   211   20.8 
2023-06-02 00:00 UT   03 58 41.3   +08 31 11    84.754   83.781   16.4    0.2   213   20.8 
2023-06-03 00:00 UT   03 58 44.4   +08 31 19    84.750   83.780   17.1    0.2   216   20.8 
2023-06-04 00:00 UT   03 58 47.5   +08 31 27    84.745   83.780   17.8    0.2   218   20.8 
2023-06-05 00:00 UT   03 58 50.6   +08 31 34    84.741   83.779   18.5    0.2   220   20.8 
2023-06-06 00:00 UT   03 58 53.6   +08 31 42    84.736   83.778   19.3    0.2   222   20.8 
2023-06-07 00:00 UT   03 58 56.7   +08 31 49    84.731   83.778   20.0    0.2   223   20.8 
2023-06-08 00:00 UT   03 58 59.7   +08 31 56    84.725   83.777   20.8    0.2   225   20.8 
2023-06-09 00:00 UT   03 59 02.7   +08 32 03    84.720   83.776   21.6    0.3   226   20.8 
2023-06-10 00:00 UT   03 59 05.7   +08 32 10    84.714   83.775   22.3    0.3   228   20.8 
2023-06-11 00:00 UT   03 59 08.7   +08 32 17    84.708   83.775   23.1    0.3   229   20.8 
2023-06-12 00:00 UT   03 59 11.7   +08 32 23    84.701   83.774   24.0    0.3   230   20.8 
2023-06-13 00:00 UT   03 59 14.7   +08 32 29    84.694   83.773   24.8    0.3   231   20.8 
2023-06-14 00:00 UT   03 59 17.7   +08 32 35    84.688   83.772   25.6    0.3   232   20.8 
2023-06-15 00:00 UT   03 59 20.6   +08 32 41    84.680   83.772   26.4    0.3   233   20.8 
2023-06-16 00:00 UT   03 59 23.5   +08 32 47    84.673   83.771   27.3    0.3   234   20.8 
2023-06-17 00:00 UT   03 59 26.4   +08 32 52    84.665   83.770   28.1    0.3   235   20.9 
2023-06-18 00:00 UT   03 59 29.3   +08 32 58    84.657   83.770   29.0    0.3   236   20.9 
2023-06-19 00:00 UT   03 59 32.2   +08 33 03    84.649   83.769   29.8    0.3   237   20.9 
2023-06-20 00:00 UT   03 59 35.1   +08 33 08    84.641   83.768   30.7    0.4   238   20.9 
2023-06-21 00:00 UT   03 59 37.9   +08 33 13    84.632   83.767   31.6    0.4   238   20.9 
2023-06-22 00:00 UT   03 59 40.7   +08 33 17    84.623   83.767   32.4    0.4   239   20.9 
2023-06-23 00:00 UT   03 59 43.5   +08 33 21    84.614   83.766   33.3    0.4   240   20.9 
2023-06-24 00:00 UT   03 59 46.3   +08 33 26    84.604   83.765   34.2    0.4   240   20.9 
2023-06-25 00:00 UT   03 59 49.0   +08 33 30    84.595   83.764   35.1    0.4   241   20.9 
2023-06-26 00:00 UT   03 59 51.7   +08 33 33    84.585   83.764   36.0    0.4   242   20.9 
2023-06-27 00:00 UT   03 59 54.4   +08 33 37    84.575   83.763   36.8    0.4   242   20.9 
2023-06-28 00:00 UT   03 59 57.1   +08 33 40    84.564   83.762   37.7    0.4   243   20.9 
2023-06-29 00:00 UT   03 59 59.8   +08 33 43    84.554   83.762   38.6    0.4   243   20.9 

    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.