(90377) Sedna
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	27 Jul 2024	20.8	83.514 AU	83.951 AU	04h03m	+08°40'	64.3°	0.6°
Opposition	21 Nov 2024	20.7	83.430 AU	82.464 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)                : 0.8607712
            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
2024-07-27 00:00 UT   04 03 07.0   +08 40 47    83.951   83.514   64.3    0.6   253   20.8 
2024-07-27 00:14 UT   04 03 07.0   +08 40 47    83.950   83.514   64.3    0.6   253   20.8 
2024-07-28 00:00 UT   04 03 08.7   +08 40 45    83.935   83.514   65.2    0.6   253   20.8 
2024-07-29 00:00 UT   04 03 10.4   +08 40 42    83.919   83.513   66.1    0.6   253   20.8 
2024-07-30 00:00 UT   04 03 12.0   +08 40 39    83.903   83.512   67.0    0.6   253   20.8 
2024-07-31 00:00 UT   04 03 13.5   +08 40 36    83.887   83.511   68.0    0.6   254   20.8 
2024-08-01 00:00 UT   04 03 15.0   +08 40 32    83.871   83.511   68.9    0.6   254   20.8 
2024-08-02 00:00 UT   04 03 16.5   +08 40 29    83.855   83.510   69.8    0.7   254   20.8 
2024-08-03 00:00 UT   04 03 18.0   +08 40 25    83.839   83.509   70.8    0.7   254   20.8 
2024-08-04 00:00 UT   04 03 19.4   +08 40 21    83.822   83.509   71.7    0.7   255   20.8 
2024-08-05 00:00 UT   04 03 20.7   +08 40 17    83.806   83.508   72.6    0.7   255   20.8 
2024-08-06 00:00 UT   04 03 22.0   +08 40 12    83.789   83.507   73.5    0.7   255   20.8 
2024-08-07 00:00 UT   04 03 23.3   +08 40 08    83.773   83.506   74.5    0.7   255   20.8 
2024-08-08 00:00 UT   04 03 24.5   +08 40 03    83.756   83.506   75.4    0.7   255   20.8 
2024-08-09 00:00 UT   04 03 25.7   +08 39 58    83.739   83.505   76.3    0.7   256   20.8 
2024-08-10 00:00 UT   04 03 26.8   +08 39 53    83.722   83.504   77.3    0.7   256   20.8 
2024-08-11 00:00 UT   04 03 27.9   +08 39 48    83.705   83.504   78.2    0.7   256   20.8 
2024-08-12 00:00 UT   04 03 28.9   +08 39 43    83.688   83.503   79.1    0.7   256   20.8 
2024-08-13 00:00 UT   04 03 29.9   +08 39 37    83.671   83.502   80.1    0.7   256   20.8 
2024-08-14 00:00 UT   04 03 30.9   +08 39 32    83.654   83.501   81.0    0.7   257   20.8 
2024-08-15 00:00 UT   04 03 31.8   +08 39 26    83.637   83.501   81.9    0.7   257   20.8 
2024-08-16 00:00 UT   04 03 32.6   +08 39 20    83.620   83.500   82.9    0.7   257   20.8 
2024-08-17 00:00 UT   04 03 33.4   +08 39 14    83.602   83.499   83.8    0.7   257   20.8 
2024-08-18 00:00 UT   04 03 34.2   +08 39 07    83.585   83.499   84.8    0.7   257   20.8 
2024-08-19 00:00 UT   04 03 34.9   +08 39 01    83.568   83.498   85.7    0.7   258   20.8 
2024-08-20 00:00 UT   04 03 35.6   +08 38 54    83.551   83.497   86.6    0.7   258   20.8 
2024-08-21 00:00 UT   04 03 36.2   +08 38 47    83.533   83.496   87.6    0.7   258   20.8 
2024-08-22 00:00 UT   04 03 36.8   +08 38 40    83.516   83.496   88.5    0.7   258   20.8 
2024-08-23 00:00 UT   04 03 37.3   +08 38 33    83.499   83.495   89.5    0.7   258   20.8 
2024-08-24 00:00 UT   04 03 37.8   +08 38 26    83.481   83.494   90.4    0.7   259   20.8 
2024-08-25 00:00 UT   04 03 38.2   +08 38 19    83.464   83.493   91.3    0.7   259   20.8 
2024-08-26 00:00 UT   04 03 38.6   +08 38 11    83.447   83.493   92.3    0.7   259   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.