(386) Siegena
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Opposition	23 Nov 2025	11.4	2.471 AU	1.576 AU	04h24m	-10°33'	148.3°	12.1°
Today	23 Dec 2025	11.8	2.503 AU	1.707 AU	04h03m	-10°10'	135.2°	16.1°

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.

Ephemerides:

Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2025-12-23 00:00 UT   04 03 11.1   -10 10 06     1.707    2.503  135.2   16.1    41   11.8 
2025-12-23 10:40 UT   04 02 58.2   -10 07 41     1.711    2.503  134.9   16.2    42   11.8 
2025-12-24 00:00 UT   04 02 42.3   -10 04 35     1.715    2.504  134.4   16.3    42   11.8 
2025-12-25 00:00 UT   04 02 14.9   -09 58 49     1.723    2.505  133.7   16.5    43   11.8 
2025-12-26 00:00 UT   04 01 49.0   -09 52 47     1.731    2.506  133.0   16.7    45   11.8 
2025-12-27 00:00 UT   04 01 24.5   -09 46 31     1.739    2.508  132.2   16.9    46   11.8 
2025-12-28 00:00 UT   04 01 01.4   -09 40 01     1.747    2.509  131.5   17.1    47   11.9 
2025-12-29 00:00 UT   04 00 39.9   -09 33 18     1.755    2.510  130.7   17.3    48   11.9 
2025-12-30 00:00 UT   04 00 19.9   -09 26 21     1.764    2.511  129.9   17.5    49   11.9 
2025-12-31 00:00 UT   04 00 01.3   -09 19 11     1.773    2.512  129.2   17.7    50   11.9 
2026-01-01 00:00 UT   03 59 44.4   -09 11 49     1.782    2.514  128.4   17.9    51   11.9 
2026-01-02 00:00 UT   03 59 28.9   -09 04 15     1.791    2.515  127.6   18.0    52   12.0 
2026-01-03 00:00 UT   03 59 15.0   -08 56 29     1.800    2.516  126.9   18.2    52   12.0 
2026-01-04 00:00 UT   03 59 02.6   -08 48 32     1.810    2.517  126.1   18.4    53   12.0 
2026-01-05 00:00 UT   03 58 51.8   -08 40 25     1.819    2.519  125.3   18.6    54   12.0 
2026-01-06 00:00 UT   03 58 42.6   -08 32 07     1.829    2.520  124.5   18.8    55   12.0 
2026-01-07 00:00 UT   03 58 34.9   -08 23 40     1.839    2.521  123.7   18.9    56   12.0 
2026-01-08 00:00 UT   03 58 28.8   -08 15 02     1.849    2.522  123.0   19.1    57   12.1 
2026-01-09 00:00 UT   03 58 24.2   -08 06 16     1.859    2.524  122.2   19.3    57   12.1 
2026-01-10 00:00 UT   03 58 21.2   -07 57 21     1.869    2.525  121.4   19.4    58   12.1 
2026-01-11 00:00 UT   03 58 19.8   -07 48 17     1.879    2.526  120.6   19.6    59   12.1 
2026-01-12 00:00 UT   03 58 19.9   -07 39 05     1.890    2.528  119.8   19.7    59   12.1 
2026-01-13 00:00 UT   03 58 21.7   -07 29 46     1.901    2.529  119.1   19.9    60   12.2 
2026-01-14 00:00 UT   03 58 24.9   -07 20 19     1.911    2.530  118.3   20.0    61   12.2 
2026-01-15 00:00 UT   03 58 29.7   -07 10 46     1.922    2.531  117.5   20.2    62   12.2 
2026-01-16 00:00 UT   03 58 36.1   -07 01 05     1.933    2.533  116.7   20.3    62   12.2 
2026-01-17 00:00 UT   03 58 44.0   -06 51 19     1.944    2.534  115.9   20.4    63   12.2 
2026-01-18 00:00 UT   03 58 53.5   -06 41 26     1.955    2.535  115.2   20.6    63   12.2 
2026-01-19 00:00 UT   03 59 04.5   -06 31 28     1.967    2.537  114.4   20.7    64   12.3 
2026-01-20 00:00 UT   03 59 17.0   -06 21 25     1.978    2.538  113.6   20.8    65   12.3 
2026-01-21 00:00 UT   03 59 31.0   -06 11 17     1.990    2.539  112.9   20.9    65   12.3 
2026-01-22 00:00 UT   03 59 46.6   -06 01 05     2.001    2.541  112.1   21.0    66   12.3 

    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.