(90377) Sedna
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Opposition	21 Nov 2024	20.7	83.430 AU	82.464 AU	04h01m	+08°24'	168.0°	0.1°
Today	19 Dec 2024	20.8	83.410 AU	82.555 AU	04h00m	+08°21'	150.2°	0.3°

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)                : 0.8607712
            a (Semimajor axis)              : 548.2997125
            i (Inclination)                 : 11.92869
            Ω (Longitude of ascending node) : 144.34714
            ω (Argument of perihelion)      : 310.84306
            M (Mean anomaly)                : 358.56644
            Epoch                           : 2024 Mar 31

            L (Longitude of perihelion)     : 95.80997
            B (Latitude of perihelion)      : -8.99596
            P (Orbital period in years)     : 12838.88            
        

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
2024-12-19 00:00 UT   04 00 31.5   +08 21 45    82.555   83.410  150.2    0.3    57   20.8 
2024-12-19 00:05 UT   04 00 31.4   +08 21 45    82.555   83.410  150.2    0.3    57   20.8 
2024-12-20 00:00 UT   04 00 29.3   +08 21 43    82.562   83.409  149.3    0.3    57   20.8 
2024-12-21 00:00 UT   04 00 27.1   +08 21 41    82.570   83.409  148.3    0.4    58   20.8 
2024-12-22 00:00 UT   04 00 24.9   +08 21 39    82.578   83.408  147.4    0.4    59   20.8 
2024-12-23 00:00 UT   04 00 22.8   +08 21 37    82.586   83.407  146.4    0.4    60   20.8 
2024-12-24 00:00 UT   04 00 20.7   +08 21 36    82.595   83.407  145.5    0.4    60   20.8 
2024-12-25 00:00 UT   04 00 18.6   +08 21 35    82.603   83.406  144.5    0.4    61   20.8 
2024-12-26 00:00 UT   04 00 16.6   +08 21 34    82.612   83.405  143.6    0.4    62   20.8 
2024-12-27 00:00 UT   04 00 14.6   +08 21 33    82.621   83.404  142.6    0.4    62   20.8 
2024-12-28 00:00 UT   04 00 12.6   +08 21 32    82.631   83.404  141.6    0.4    63   20.8 
2024-12-29 00:00 UT   04 00 10.6   +08 21 32    82.640   83.403  140.7    0.4    63   20.8 
2024-12-30 00:00 UT   04 00 08.7   +08 21 32    82.650   83.402  139.7    0.4    64   20.8 
2024-12-31 00:00 UT   04 00 06.8   +08 21 32    82.660   83.402  138.7    0.4    64   20.8 
2025-01-01 00:00 UT   04 00 04.9   +08 21 32    82.671   83.401  137.8    0.5    65   20.8 
2025-01-02 00:00 UT   04 00 03.1   +08 21 33    82.681   83.400  136.8    0.5    65   20.8 
2025-01-03 00:00 UT   04 00 01.3   +08 21 34    82.692   83.399  135.8    0.5    66   20.8 
2025-01-04 00:00 UT   03 59 59.5   +08 21 35    82.703   83.399  134.8    0.5    66   20.8 
2025-01-05 00:00 UT   03 59 57.7   +08 21 36    82.714   83.398  133.8    0.5    67   20.8 
2025-01-06 00:00 UT   03 59 56.0   +08 21 37    82.726   83.397  132.8    0.5    67   20.8 
2025-01-07 00:00 UT   03 59 54.4   +08 21 39    82.737   83.397  131.9    0.5    67   20.8 
2025-01-08 00:00 UT   03 59 52.7   +08 21 41    82.749   83.396  130.9    0.5    68   20.8 
2025-01-09 00:00 UT   03 59 51.1   +08 21 43    82.761   83.395  129.9    0.5    68   20.8 
2025-01-10 00:00 UT   03 59 49.6   +08 21 45    82.774   83.394  128.9    0.5    68   20.8 
2025-01-11 00:00 UT   03 59 48.0   +08 21 48    82.786   83.394  127.9    0.5    69   20.8 
2025-01-12 00:00 UT   03 59 46.6   +08 21 51    82.799   83.393  126.9    0.5    69   20.8 
2025-01-13 00:00 UT   03 59 45.1   +08 21 54    82.812   83.392  125.9    0.5    69   20.8 
2025-01-14 00:00 UT   03 59 43.7   +08 21 57    82.825   83.391  124.9    0.6    70   20.8 
2025-01-15 00:00 UT   03 59 42.3   +08 22 00    82.838   83.391  124.0    0.6    70   20.8 
2025-01-16 00:00 UT   03 59 41.0   +08 22 04    82.851   83.390  123.0    0.6    70   20.8 
2025-01-17 00:00 UT   03 59 39.7   +08 22 08    82.865   83.389  122.0    0.6    71   20.8 
2025-01-18 00:00 UT   03 59 38.5   +08 22 12    82.878   83.389  121.0    0.6    71   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.