(386) Siegena
ephemeris date magn radius delta ra dec elong phase
Today15 Jul 202512.82.407 AU2.636 AU03h11m+05°54'65.9°22.7°
Opposition23 Nov 202511.42.471 AU1.576 AU04h24m-10°33'148.3°12.1°
(386) Siegena - 2025-07-15
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 Siegena are:

            e (Eccentricity)                : 0.1691797
            a (Semimajor axis)              : 2.8969678
            i (Inclination)                 : 20.21985
            Ω (Longitude of ascending node) : 166.61523
            ω (Argument of perihelion)      : 221.10647
            M (Mean anomaly)                : 344.35936
            Epoch                           : 2025 May 05

            L (Longitude of perihelion)     : 205.92522
            B (Latitude of perihelion)      : -13.13426
            P (Orbital period in years)     : 4.93            
        

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
2025-07-15 00:00 UT   03 11 17.2   +05 54 24     2.636    2.407   65.9   22.7   249   12.8 
2025-07-15 21:52 UT   03 12 46.5   +05 53 56     2.626    2.407   66.4   22.8   249   12.8 
2025-07-16 00:00 UT   03 12 55.1   +05 53 53     2.625    2.407   66.5   22.8   249   12.8 
2025-07-17 00:00 UT   03 14 32.7   +05 53 13     2.614    2.407   67.0   22.9   249   12.8 
2025-07-18 00:00 UT   03 16 09.9   +05 52 25     2.604    2.407   67.6   23.0   250   12.8 
2025-07-19 00:00 UT   03 17 46.7   +05 51 28     2.593    2.407   68.1   23.1   250   12.8 
2025-07-20 00:00 UT   03 19 23.0   +05 50 24     2.582    2.407   68.7   23.2   250   12.8 
2025-07-21 00:00 UT   03 20 58.9   +05 49 10     2.571    2.407   69.3   23.3   250   12.8 
2025-07-22 00:00 UT   03 22 34.3   +05 47 49     2.560    2.407   69.8   23.3   250   12.8 
2025-07-23 00:00 UT   03 24 09.3   +05 46 19     2.549    2.407   70.4   23.4   251   12.8 
2025-07-24 00:00 UT   03 25 43.8   +05 44 40     2.538    2.407   71.0   23.5   251   12.8 
2025-07-25 00:00 UT   03 27 17.8   +05 42 53     2.527    2.407   71.5   23.6   251   12.8 
2025-07-26 00:00 UT   03 28 51.3   +05 40 57     2.516    2.407   72.1   23.7   251   12.8 
2025-07-27 00:00 UT   03 30 24.3   +05 38 53     2.505    2.407   72.7   23.8   252   12.8 
2025-07-28 00:00 UT   03 31 56.7   +05 36 40     2.494    2.407   73.3   23.8   252   12.8 
2025-07-29 00:00 UT   03 33 28.6   +05 34 18     2.483    2.407   73.8   23.9   252   12.8 
2025-07-30 00:00 UT   03 34 60.0   +05 31 47     2.472    2.407   74.4   24.0   252   12.7 
2025-07-31 00:00 UT   03 36 30.8   +05 29 08     2.461    2.407   75.0   24.0   252   12.7 
2025-08-01 00:00 UT   03 38 01.0   +05 26 20     2.450    2.407   75.6   24.1   253   12.7 
2025-08-02 00:00 UT   03 39 30.6   +05 23 23     2.439    2.407   76.2   24.2   253   12.7 
2025-08-03 00:00 UT   03 40 59.7   +05 20 17     2.428    2.407   76.8   24.2   253   12.7 
2025-08-04 00:00 UT   03 42 28.1   +05 17 02     2.417    2.408   77.4   24.3   253   12.7 
2025-08-05 00:00 UT   03 43 55.9   +05 13 39     2.406    2.408   78.0   24.3   254   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.