(90482) Orcus
ephemeris date magn radius delta ra dec elong phase
Today27 Sep 202219.348.047 AU48.934 AU10h30m-11°43'27.4°0.6°
Opposition4 Mar 202319.248.041 AU47.111 AU10h29m-12°29'159.6°0.4°
(90482) Orcus - 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 Orcus are:

            e (Eccentricity)                : 0.2293150
            a (Semimajor axis)              : 39.0979380
            i (Inclination)                 : 20.57912
            Ω (Longitude of ascending node) : 268.66479
            ω (Argument of perihelion)      : 72.96812
            M (Mean anomaly)                : 183.33691
            Epoch                           : 2022 Jan 21

            L (Longitude of perihelion)     : 340.54567
            B (Latitude of perihelion)      : 19.63849
            P (Orbital period in years)     : 244.47            
        

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   10 30 34.7   -11 43 16    48.934   48.047   27.4    0.6   250   19.3 
2022-09-27 02:25 UT   10 30 35.2   -11 43 20    48.934   48.047   27.5    0.6   250   19.3 
2022-09-28 00:00 UT   10 30 39.3   -11 43 55    48.928   48.047   28.1    0.6   251   19.3 
2022-09-29 00:00 UT   10 30 43.8   -11 44 34    48.922   48.047   28.8    0.6   253   19.3 
2022-09-30 00:00 UT   10 30 48.3   -11 45 13    48.916   48.047   29.5    0.6   254   19.3 
2022-10-01 00:00 UT   10 30 52.7   -11 45 52    48.909   48.047   30.2    0.6   255   19.3 
2022-10-02 00:00 UT   10 30 57.1   -11 46 32    48.903   48.046   30.9    0.6   257   19.3 
2022-10-03 00:00 UT   10 31 01.5   -11 47 11    48.895   48.046   31.7    0.6   258   19.3 
2022-10-04 00:00 UT   10 31 05.8   -11 47 51    48.888   48.046   32.4    0.6   259   19.3 
2022-10-05 00:00 UT   10 31 10.1   -11 48 31    48.881   48.046   33.2    0.7   260   19.3 
2022-10-06 00:00 UT   10 31 14.3   -11 49 11    48.873   48.046   33.9    0.7   261   19.3 
2022-10-07 00:00 UT   10 31 18.5   -11 49 51    48.865   48.046   34.7    0.7   262   19.3 
2022-10-08 00:00 UT   10 31 22.6   -11 50 31    48.856   48.046   35.5    0.7   263   19.3 
2022-10-09 00:00 UT   10 31 26.7   -11 51 11    48.848   48.046   36.3    0.7   264   19.3 
2022-10-10 00:00 UT   10 31 30.7   -11 51 52    48.839   48.046   37.1    0.7   265   19.3 
2022-10-11 00:00 UT   10 31 34.7   -11 52 32    48.830   48.046   37.9    0.7   266   19.3 
2022-10-12 00:00 UT   10 31 38.7   -11 53 13    48.821   48.046   38.7    0.7   267   19.3 
2022-10-13 00:00 UT   10 31 42.6   -11 53 53    48.812   48.046   39.5    0.8   267   19.3 
2022-10-14 00:00 UT   10 31 46.4   -11 54 34    48.802   48.046   40.4    0.8   268   19.3 
2022-10-15 00:00 UT   10 31 50.2   -11 55 14    48.792   48.046   41.2    0.8   269   19.3 
2022-10-16 00:00 UT   10 31 53.9   -11 55 55    48.782   48.046   42.0    0.8   270   19.3 
2022-10-17 00:00 UT   10 31 57.6   -11 56 36    48.772   48.046   42.9    0.8   270   19.3 
2022-10-18 00:00 UT   10 32 01.2   -11 57 17    48.761   48.046   43.7    0.8   271   19.3 
2022-10-19 00:00 UT   10 32 04.8   -11 57 57    48.750   48.046   44.6    0.8   272   19.3 
2022-10-20 00:00 UT   10 32 08.3   -11 58 38    48.739   48.046   45.5    0.8   273   19.3 
2022-10-21 00:00 UT   10 32 11.7   -11 59 19    48.728   48.046   46.3    0.9   273   19.3 
2022-10-22 00:00 UT   10 32 15.1   -11 59 59    48.717   48.046   47.2    0.9   274   19.3 
2022-10-23 00:00 UT   10 32 18.4   -12 00 40    48.705   48.046   48.1    0.9   274   19.3 
2022-10-24 00:00 UT   10 32 21.7   -12 01 21    48.694   48.046   48.9    0.9   275   19.3 
2022-10-25 00:00 UT   10 32 24.9   -12 02 01    48.682   48.046   49.8    0.9   276   19.3 
2022-10-26 00:00 UT   10 32 28.0   -12 02 41    48.669   48.046   50.7    0.9   276   19.3 
2022-10-27 00:00 UT   10 32 31.1   -12 03 22    48.657   48.046   51.6    0.9   277   19.3 


    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.