(90482) Orcus
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Opposition	6 Mar 2025	19.0	48.013 AU	47.082 AU	10h36m	-13°22'	159.5°	0.4°
Today	31 Mar 2025	19.0	48.011 AU	47.158 AU	10h34m	-13°10'	148.3°	0.6°

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)                : 0.2231445
            a (Semimajor axis)              : 39.2890662
            i (Inclination)                 : 20.55553
            Ω (Longitude of ascending node) : 268.38605
            ω (Argument of perihelion)      : 73.79654
            M (Mean anomaly)                : 187.21826
            Epoch                           : 2025 May 05

            L (Longitude of perihelion)     : 341.14423
            B (Latitude of perihelion)      : 19.70440
            P (Orbital period in years)     : 246.27            
        

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
2025-03-31 00:00 UT   10 34 36.5   -13 10 47    47.158   48.011  148.3    0.6    76   19.0 
2025-03-31 00:54 UT   10 34 36.4   -13 10 46    47.159   48.011  148.3    0.6    76   19.0 
2025-04-01 00:00 UT   10 34 33.1   -13 10 14    47.165   48.011  147.6    0.6    77   19.1 
2025-04-02 00:00 UT   10 34 29.7   -13 09 41    47.172   48.011  146.8    0.7    78   19.1 
2025-04-03 00:00 UT   10 34 26.3   -13 09 09    47.179   48.011  146.0    0.7    80   19.1 
2025-04-04 00:00 UT   10 34 23.0   -13 08 35    47.186   48.011  145.3    0.7    81   19.1 
2025-04-05 00:00 UT   10 34 19.8   -13 08 02    47.194   48.011  144.5    0.7    82   19.1 
2025-04-06 00:00 UT   10 34 16.6   -13 07 29    47.202   48.011  143.7    0.7    83   19.1 
2025-04-07 00:00 UT   10 34 13.5   -13 06 56    47.210   48.011  142.9    0.7    84   19.1 
2025-04-08 00:00 UT   10 34 10.4   -13 06 22    47.218   48.011  142.0    0.7    85   19.1 
2025-04-09 00:00 UT   10 34 07.3   -13 05 49    47.226   48.011  141.2    0.7    86   19.1 
2025-04-10 00:00 UT   10 34 04.4   -13 05 15    47.235   48.011  140.4    0.8    86   19.1 
2025-04-11 00:00 UT   10 34 01.4   -13 04 42    47.244   48.011  139.5    0.8    87   19.1 
2025-04-12 00:00 UT   10 33 58.6   -13 04 08    47.253   48.011  138.7    0.8    88   19.1 
2025-04-13 00:00 UT   10 33 55.8   -13 03 35    47.263   48.011  137.9    0.8    89   19.1 
2025-04-14 00:00 UT   10 33 53.0   -13 03 01    47.272   48.011  137.0    0.8    90   19.1 
2025-04-15 00:00 UT   10 33 50.4   -13 02 27    47.282   48.011  136.2    0.8    90   19.1 
2025-04-16 00:00 UT   10 33 47.8   -13 01 54    47.292   48.011  135.3    0.8    91   19.1 
2025-04-17 00:00 UT   10 33 45.2   -13 01 20    47.303   48.011  134.4    0.9    92   19.1 
2025-04-18 00:00 UT   10 33 42.7   -13 00 47    47.313   48.011  133.6    0.9    92   19.1 
2025-04-19 00:00 UT   10 33 40.3   -13 00 13    47.324   48.011  132.7    0.9    93   19.1 
2025-04-20 00:00 UT   10 33 37.9   -12 59 40    47.335   48.010  131.8    0.9    94   19.1 
2025-04-21 00:00 UT   10 33 35.6   -12 59 07    47.346   48.010  131.0    0.9    94   19.1 
2025-04-22 00:00 UT   10 33 33.4   -12 58 33    47.357   48.010  130.1    0.9    95   19.1 
2025-04-23 00:00 UT   10 33 31.2   -12 58 00    47.369   48.010  129.2    0.9    96   19.1 
2025-04-24 00:00 UT   10 33 29.1   -12 57 27    47.380   48.010  128.3    0.9    96   19.1 
2025-04-25 00:00 UT   10 33 27.1   -12 56 54    47.392   48.010  127.4    1.0    97   19.1 
2025-04-26 00:00 UT   10 33 25.2   -12 56 22    47.404   48.010  126.6    1.0    97   19.1 
2025-04-27 00:00 UT   10 33 23.3   -12 55 49    47.416   48.010  125.7    1.0    98   19.1 
2025-04-28 00:00 UT   10 33 21.5   -12 55 16    47.429   48.010  124.8    1.0    98   19.1 
2025-04-29 00:00 UT   10 33 19.7   -12 54 44    47.441   48.010  123.9    1.0    99   19.1 
2025-04-30 00:00 UT   10 33 18.1   -12 54 12    47.454   48.010  123.0    1.0    99   19.1 

    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.