(90377) Sedna
ephemeris date magn radius delta ra dec elong phase
Today27 Sep 202220.983.790 AU83.240 AU04h00m+08°23'123.0°0.6°
Opposition21 Nov 202220.883.749 AU82.783 AU03h58m+08°14'168.0°0.1°
(90377) Sedna - 2022-09-27
astro.vanbuitenen.nl


 
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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)                : 0.8503769
            a (Semimajor axis)              : 510.4082945
            i (Inclination)                 : 11.93112
            Ω (Longitude of ascending node) : 144.21125
            ω (Argument of perihelion)      : 311.02122
            M (Mean anomaly)                : 358.32835
            Epoch                           : 2022 Jan 21

            L (Longitude of perihelion)     : 95.85300
            B (Latitude of perihelion)      : -8.97335
            P (Orbital period in years)     : 11531.26            
        

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
2022-09-27 00:00 UT   04 00 29.8   +08 23 23    83.240   83.790  123.0    0.6   266   20.9 
2022-09-27 01:18 UT   04 00 29.7   +08 23 23    83.239   83.790  123.0    0.6   266   20.9 
2022-09-28 00:00 UT   04 00 28.6   +08 23 13    83.226   83.789  123.9    0.6   267   20.9 
2022-09-29 00:00 UT   04 00 27.5   +08 23 02    83.211   83.788  124.9    0.6   267   20.9 
2022-09-30 00:00 UT   04 00 26.3   +08 22 51    83.197   83.787  125.9    0.6   267   20.9 
2022-10-01 00:00 UT   04 00 25.0   +08 22 41    83.183   83.787  126.8    0.5   267   20.9 
2022-10-02 00:00 UT   04 00 23.7   +08 22 30    83.170   83.786  127.8    0.5   268   20.9 
2022-10-03 00:00 UT   04 00 22.4   +08 22 19    83.156   83.785  128.7    0.5   268   20.9 
2022-10-04 00:00 UT   04 00 21.1   +08 22 08    83.143   83.785  129.7    0.5   268   20.9 
2022-10-05 00:00 UT   04 00 19.7   +08 21 57    83.130   83.784  130.6    0.5   269   20.9 
2022-10-06 00:00 UT   04 00 18.2   +08 21 46    83.117   83.783  131.6    0.5   269   20.9 
2022-10-07 00:00 UT   04 00 16.7   +08 21 35    83.104   83.782  132.5    0.5   270   20.9 
2022-10-08 00:00 UT   04 00 15.2   +08 21 24    83.091   83.782  133.5    0.5   270   20.9 
2022-10-09 00:00 UT   04 00 13.7   +08 21 13    83.079   83.781  134.4    0.5   270   20.9 
2022-10-10 00:00 UT   04 00 12.1   +08 21 03    83.067   83.780  135.4    0.5   271   20.9 
2022-10-11 00:00 UT   04 00 10.5   +08 20 52    83.055   83.780  136.3    0.5   271   20.9 
2022-10-12 00:00 UT   04 00 08.8   +08 20 41    83.043   83.779  137.3    0.5   272   20.9 
2022-10-13 00:00 UT   04 00 07.1   +08 20 30    83.032   83.778  138.2    0.5   272   20.9 
2022-10-14 00:00 UT   04 00 05.4   +08 20 19    83.020   83.777  139.2    0.4   273   20.9 
2022-10-15 00:00 UT   04 00 03.6   +08 20 08    83.009   83.777  140.1    0.4   273   20.9 
2022-10-16 00:00 UT   04 00 01.9   +08 19 57    82.998   83.776  141.1    0.4   274   20.9 
2022-10-17 00:00 UT   04 00 00.0   +08 19 46    82.988   83.775  142.0    0.4   274   20.9 
2022-10-18 00:00 UT   03 59 58.2   +08 19 36    82.977   83.774  142.9    0.4   275   20.9 
2022-10-19 00:00 UT   03 59 56.3   +08 19 25    82.967   83.774  143.9    0.4   275   20.9 
2022-10-20 00:00 UT   03 59 54.4   +08 19 14    82.957   83.773  144.8    0.4   276   20.9 
2022-10-21 00:00 UT   03 59 52.4   +08 19 03    82.948   83.772  145.7    0.4   276   20.9 
2022-10-22 00:00 UT   03 59 50.5   +08 18 53    82.938   83.772  146.7    0.4   277   20.9 
2022-10-23 00:00 UT   03 59 48.5   +08 18 42    82.929   83.771  147.6    0.4   278   20.9 
2022-10-24 00:00 UT   03 59 46.5   +08 18 32    82.920   83.770  148.5    0.4   279   20.8 
2022-10-25 00:00 UT   03 59 44.4   +08 18 21    82.912   83.769  149.4    0.3   279   20.8 
2022-10-26 00:00 UT   03 59 42.3   +08 18 11    82.903   83.769  150.4    0.3   280   20.8 
2022-10-27 00:00 UT   03 59 40.2   +08 18 00    82.895   83.768  151.3    0.3   281   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.