(579) Sidonia
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	27 Oct 2025	12.3	2.977 AU	2.000 AU	02h44m	+03°39'	166.7°	4.4°
Opposition	31 Oct 2025	12.3	2.980 AU	2.001 AU	02h40m	+03°31'	168.4°	3.8°

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 Sidonia are:

            e (Eccentricity)                : 0.0761880
            a (Semimajor axis)              : 3.0118595
            i (Inclination)                 : 11.01735
            Ω (Longitude of ascending node) : 82.62080
            ω (Argument of perihelion)      : 229.09026
            M (Mean anomaly)                : 81.53748
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 131.18289
            B (Latitude of perihelion)      : -8.30410
            P (Orbital period in years)     : 5.23            
        

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.

Ephemerides:

Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2025-10-27 00:00 UT   02 44 34.6   +03 39 48     2.000    2.977  166.7    4.4   313   12.3 
2025-10-27 21:38 UT   02 43 48.7   +03 38 01     2.000    2.977  167.2    4.2   317   12.3 
2025-10-28 00:00 UT   02 43 43.7   +03 37 50     2.000    2.977  167.3    4.2   318   12.3 
2025-10-29 00:00 UT   02 42 52.5   +03 35 57     2.000    2.978  167.7    4.1   323   12.3 
2025-10-30 00:00 UT   02 42 01.1   +03 34 08     2.000    2.979  168.1    3.9   329   12.3 
2025-10-31 00:00 UT   02 41 09.5   +03 32 25     2.000    2.980  168.4    3.9   334   12.3 
2025-11-01 00:00 UT   02 40 17.8   +03 30 48     2.001    2.980  168.5    3.8   340   12.3 
2025-11-02 00:00 UT   02 39 26.0   +03 29 15     2.002    2.981  168.5    3.8   346   12.3 
2025-11-03 00:00 UT   02 38 34.2   +03 27 49     2.003    2.982  168.4    3.8   352   12.3 
2025-11-04 00:00 UT   02 37 42.4   +03 26 28     2.005    2.983  168.2    3.9   358   12.3 
2025-11-05 00:00 UT   02 36 50.7   +03 25 14     2.007    2.983  167.8    4.0     4   12.3 
2025-11-06 00:00 UT   02 35 59.1   +03 24 05     2.009    2.984  167.4    4.2     9   12.3 
2025-11-07 00:00 UT   02 35 07.7   +03 23 03     2.011    2.985  166.8    4.3    14   12.3 
2025-11-08 00:00 UT   02 34 16.6   +03 22 08     2.014    2.986  166.2    4.5    18   12.3 
2025-11-09 00:00 UT   02 33 25.7   +03 21 19     2.017    2.986  165.5    4.8    22   12.3 
2025-11-10 00:00 UT   02 32 35.1   +03 20 37     2.020    2.987  164.7    5.0    26   12.3 
2025-11-11 00:00 UT   02 31 45.0   +03 20 02     2.024    2.988  163.9    5.3    29   12.4 
2025-11-12 00:00 UT   02 30 55.3   +03 19 34     2.028    2.989  163.1    5.5    32   12.4 
2025-11-13 00:00 UT   02 30 06.1   +03 19 13     2.032    2.989  162.2    5.8    35   12.4 
2025-11-14 00:00 UT   02 29 17.4   +03 18 59     2.036    2.990  161.2    6.1    37   12.4 
2025-11-15 00:00 UT   02 28 29.3   +03 18 53     2.041    2.991  160.3    6.4    39   12.4 
2025-11-16 00:00 UT   02 27 41.9   +03 18 55     2.046    2.992  159.3    6.7    41   12.5 
2025-11-17 00:00 UT   02 26 55.1   +03 19 04     2.051    2.992  158.3    7.0    43   12.5 
2025-11-18 00:00 UT   02 26 09.1   +03 19 21     2.057    2.993  157.3    7.3    45   12.5 
2025-11-19 00:00 UT   02 25 23.8   +03 19 46     2.062    2.994  156.3    7.6    46   12.5 
2025-11-20 00:00 UT   02 24 39.4   +03 20 18     2.069    2.995  155.2    7.9    47   12.5 
2025-11-21 00:00 UT   02 23 55.8   +03 20 59     2.075    2.995  154.2    8.3    49   12.6 
2025-11-22 00:00 UT   02 23 13.2   +03 21 47     2.081    2.996  153.1    8.6    50   12.6 
2025-11-23 00:00 UT   02 22 31.5   +03 22 44     2.088    2.997  152.1    8.9    51   12.6 
2025-11-24 00:00 UT   02 21 50.7   +03 23 49     2.095    2.998  151.0    9.2    52   12.6 
2025-11-25 00:00 UT   02 21 11.0   +03 25 02     2.103    2.998  150.0    9.5    53   12.6 
2025-11-26 00:00 UT   02 20 32.4   +03 26 22     2.110    2.999  148.9    9.8    54   12.7 

    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.