(386) Siegena
ephemeris date magn radius delta ra dec elong phase
Today10 Oct 202511.92.434 AU1.735 AU04h43m-03°42'123.5°20.0°
Opposition23 Nov 202511.42.471 AU1.576 AU04h24m-10°33'148.3°12.1°
(386) Siegena - 2025-10-10
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)                : 0.1692815
            a (Semimajor axis)              : 2.8973697
            i (Inclination)                 : 20.21922
            Ω (Longitude of ascending node) : 166.61219
            ω (Argument of perihelion)      : 221.15380
            M (Mean anomaly)                : 24.30067
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 205.96913
            B (Latitude of perihelion)      : -13.14651
            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
2025-10-10 00:00 UT   04 43 41.5   -03 42 36     1.735    2.434  123.5   20.0   280   11.9 
2025-10-10 04:45 UT   04 43 43.1   -03 44 52     1.734    2.434  123.7   20.0   280   11.9 
2025-10-11 00:00 UT   04 43 49.1   -03 54 07     1.728    2.435  124.3   19.8   281   11.9 
2025-10-12 00:00 UT   04 43 54.9   -04 05 39     1.721    2.435  125.1   19.6   282   11.8 
2025-10-13 00:00 UT   04 43 59.0   -04 17 12     1.713    2.436  125.8   19.4   283   11.8 
2025-10-14 00:00 UT   04 44 01.3   -04 28 44     1.706    2.437  126.6   19.2   283   11.8 
2025-10-15 00:00 UT   04 44 01.9   -04 40 16     1.699    2.437  127.4   19.0   284   11.8 
2025-10-16 00:00 UT   04 44 00.8   -04 51 48     1.692    2.438  128.2   18.8   285   11.8 
2025-10-17 00:00 UT   04 43 57.9   -05 03 17     1.686    2.439  128.9   18.5   286   11.8 
2025-10-18 00:00 UT   04 43 53.2   -05 14 45     1.679    2.439  129.7   18.3   287   11.8 
2025-10-19 00:00 UT   04 43 46.9   -05 26 11     1.673    2.440  130.5   18.1   288   11.7 
2025-10-20 00:00 UT   04 43 38.8   -05 37 33     1.667    2.441  131.2   17.9   289   11.7 
2025-10-21 00:00 UT   04 43 28.9   -05 48 52     1.661    2.442  132.0   17.6   290   11.7 
2025-10-22 00:00 UT   04 43 17.4   -06 00 08     1.655    2.442  132.7   17.4   291   11.7 
2025-10-23 00:00 UT   04 43 04.2   -06 11 18     1.649    2.443  133.5   17.2   292   11.7 
2025-10-24 00:00 UT   04 42 49.2   -06 22 24     1.644    2.444  134.2   17.0   293   11.7 
2025-10-25 00:00 UT   04 42 32.6   -06 33 24     1.639    2.445  134.9   16.7   294   11.7 
2025-10-26 00:00 UT   04 42 14.4   -06 44 17     1.634    2.445  135.7   16.5   295   11.6 
2025-10-27 00:00 UT   04 41 54.6   -06 55 04     1.629    2.446  136.4   16.3   297   11.6 
2025-10-28 00:00 UT   04 41 33.1   -07 05 44     1.624    2.447  137.1   16.1   298   11.6 
2025-10-29 00:00 UT   04 41 10.1   -07 16 16     1.620    2.448  137.8   15.8   299   11.6 
2025-10-30 00:00 UT   04 40 45.5   -07 26 39     1.615    2.449  138.4   15.6   300   11.6 
2025-10-31 00:00 UT   04 40 19.4   -07 36 54     1.611    2.450  139.1   15.4   302   11.6 
2025-11-01 00:00 UT   04 39 51.8   -07 46 59     1.607    2.450  139.8   15.2   303   11.6 
2025-11-02 00:00 UT   04 39 22.8   -07 56 54     1.603    2.451  140.4   14.9   305   11.6 
2025-11-03 00:00 UT   04 38 52.4   -08 06 38     1.600    2.452  141.0   14.7   306   11.5 
2025-11-04 00:00 UT   04 38 20.6   -08 16 12     1.597    2.453  141.7   14.5   308   11.5 
2025-11-05 00:00 UT   04 37 47.4   -08 25 33     1.593    2.454  142.2   14.3   309   11.5 
2025-11-06 00:00 UT   04 37 12.9   -08 34 43     1.591    2.455  142.8   14.1   311   11.5 
2025-11-07 00:00 UT   04 36 37.2   -08 43 40     1.588    2.455  143.4   13.9   313   11.5 
2025-11-08 00:00 UT   04 36 00.2   -08 52 23     1.585    2.456  143.9   13.8   315   11.5 
2025-11-09 00:00 UT   04 35 22.1   -09 00 54     1.583    2.457  144.4   13.6   316   11.5 


    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.