(90377) Sedna
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	16 Apr 2024	20.8	83.582 AU	84.404 AU	03h58m	+08°29'	34.9°	0.4°
Opposition	21 Nov 2024	20.7	83.424 AU	82.458 AU	04h01m	+08°24'	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)                : 0.8607738
            a (Semimajor axis)              : 548.2991403
            i (Inclination)                 : 11.92870
            Ω (Longitude of ascending node) : 144.34667
            ω (Argument of perihelion)      : 310.84607
            M (Mean anomaly)                : 358.56637
            Epoch                           : 2024 Mar 31

            L (Longitude of perihelion)     : 95.81252
            B (Latitude of perihelion)      : -8.99556
            P (Orbital period in years)     : 12838.86            
        

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
2024-04-16 00:00 UT   03 58 28.8   +08 29 46    84.404   83.582   34.9    0.4    95   20.8 
2024-04-16 05:07 UT   03 58 29.3   +08 29 49    84.405   83.582   34.7    0.4    96   20.8 
2024-04-17 00:00 UT   03 58 31.4   +08 29 59    84.412   83.581   34.0    0.4    96   20.8 
2024-04-18 00:00 UT   03 58 34.1   +08 30 12    84.420   83.581   33.1    0.4    97   20.8 
2024-04-19 00:00 UT   03 58 36.8   +08 30 25    84.428   83.580   32.2    0.4    97   20.8 
2024-04-20 00:00 UT   03 58 39.5   +08 30 38    84.436   83.579   31.3    0.4    98   20.8 
2024-04-21 00:00 UT   03 58 42.2   +08 30 51    84.444   83.579   30.4    0.3    99   20.8 
2024-04-22 00:00 UT   03 58 45.0   +08 31 04    84.451   83.578   29.6    0.3   100   20.8 
2024-04-23 00:00 UT   03 58 47.7   +08 31 17    84.458   83.577   28.7    0.3   101   20.8 
2024-04-24 00:00 UT   03 58 50.5   +08 31 29    84.465   83.576   27.8    0.3   101   20.8 
2024-04-25 00:00 UT   03 58 53.3   +08 31 42    84.471   83.576   27.0    0.3   102   20.8 
2024-04-26 00:00 UT   03 58 56.2   +08 31 55    84.478   83.575   26.1    0.3   103   20.8 
2024-04-27 00:00 UT   03 58 59.1   +08 32 07    84.484   83.574   25.3    0.3   104   20.8 
2024-04-28 00:00 UT   03 59 01.9   +08 32 19    84.490   83.574   24.4    0.3   105   20.8 
2024-04-29 00:00 UT   03 59 04.8   +08 32 32    84.495   83.573   23.6    0.3   107   20.8 
2024-04-30 00:00 UT   03 59 07.8   +08 32 44    84.500   83.572   22.8    0.3   108   20.8 
2024-05-01 00:00 UT   03 59 10.7   +08 32 56    84.505   83.571   22.0    0.3   109   20.8 
2024-05-02 00:00 UT   03 59 13.6   +08 33 08    84.510   83.571   21.2    0.2   111   20.8 
2024-05-03 00:00 UT   03 59 16.6   +08 33 20    84.515   83.570   20.4    0.2   112   20.8 
2024-05-04 00:00 UT   03 59 19.6   +08 33 32    84.519   83.569   19.6    0.2   114   20.8 
2024-05-05 00:00 UT   03 59 22.6   +08 33 44    84.523   83.568   18.8    0.2   116   20.8 
2024-05-06 00:00 UT   03 59 25.6   +08 33 56    84.526   83.568   18.1    0.2   118   20.8 
2024-05-07 00:00 UT   03 59 28.6   +08 34 07    84.530   83.567   17.4    0.2   120   20.8 
2024-05-08 00:00 UT   03 59 31.7   +08 34 19    84.533   83.566   16.7    0.2   122   20.8 
2024-05-09 00:00 UT   03 59 34.7   +08 34 30    84.536   83.566   16.1    0.2   124   20.8 
2024-05-10 00:00 UT   03 59 37.8   +08 34 42    84.538   83.565   15.4    0.2   127   20.8 
2024-05-11 00:00 UT   03 59 40.9   +08 34 53    84.540   83.564   14.8    0.2   130   20.8 
2024-05-12 00:00 UT   03 59 43.9   +08 35 04    84.542   83.563   14.3    0.2   133   20.8 
2024-05-13 00:00 UT   03 59 47.0   +08 35 15    84.544   83.563   13.8    0.2   136   20.8 
2024-05-14 00:00 UT   03 59 50.1   +08 35 25    84.546   83.562   13.3    0.2   140   20.8 
2024-05-15 00:00 UT   03 59 53.2   +08 35 36    84.547   83.561   12.9    0.2   144   20.8 
2024-05-16 00:00 UT   03 59 56.3   +08 35 47    84.548   83.561   12.5    0.2   148   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.