(354) Eleonora
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	27 Dec 2025	11.9	2.998 AU	3.959 AU	18h46m	-14°30'	10.6°	3.4°
Opposition	15 Aug 2026	10.3	3.112 AU	2.099 AU	21h40m	-15°03'	179.0°	0.3°

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 Eleonora are:

            e (Eccentricity)                : 0.1118359
            a (Semimajor axis)              : 2.8006837
            i (Inclination)                 : 18.36129
            Ω (Longitude of ascending node) : 140.20579
            ω (Argument of perihelion)      : 8.12173
            M (Mean anomaly)                : 116.41401
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 147.91914
            B (Latitude of perihelion)      : 2.55069
            P (Orbital period in years)     : 4.69            
        

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
2025-12-27 00:00 UT   18 46 47.3   -14 30 49     3.959    2.998   10.6    3.4    32   11.9 
2025-12-27 20:59 UT   18 48 11.3   -14 31 06     3.961    2.998   10.2    3.3    30   11.9 
2025-12-28 00:00 UT   18 48 23.4   -14 31 08     3.961    2.998   10.2    3.3    29   11.9 
2025-12-29 00:00 UT   18 49 59.4   -14 31 23     3.964    2.999    9.8    3.2    26   11.9 
2025-12-30 00:00 UT   18 51 35.5   -14 31 32     3.966    3.000    9.4    3.1    23   11.9 
2025-12-31 00:00 UT   18 53 11.5   -14 31 37     3.968    3.001    9.1    3.0    19   11.9 
2026-01-01 00:00 UT   18 54 47.4   -14 31 37     3.970    3.002    8.9    2.9    16   11.8 
2026-01-02 00:00 UT   18 56 23.4   -14 31 32     3.971    3.003    8.6    2.8    12   11.8 
2026-01-03 00:00 UT   18 57 59.2   -14 31 23     3.973    3.003    8.4    2.7     7   11.8 
2026-01-04 00:00 UT   18 59 35.1   -14 31 09     3.974    3.004    8.3    2.7     3   11.8 
2026-01-05 00:00 UT   19 01 10.8   -14 30 50     3.975    3.005    8.2    2.7   359   11.8 
2026-01-06 00:00 UT   19 02 46.5   -14 30 27     3.976    3.006    8.1    2.6   354   11.8 
2026-01-07 00:00 UT   19 04 22.2   -14 29 60     3.977    3.007    8.1    2.6   349   11.8 
2026-01-08 00:00 UT   19 05 57.8   -14 29 27     3.978    3.007    8.1    2.6   345   11.8 
2026-01-09 00:00 UT   19 07 33.3   -14 28 51     3.978    3.008    8.2    2.7   340   11.8 
2026-01-10 00:00 UT   19 09 08.7   -14 28 10     3.979    3.009    8.3    2.7   336   11.8 
2026-01-11 00:00 UT   19 10 44.0   -14 27 24     3.979    3.010    8.5    2.8   331   11.9 
2026-01-12 00:00 UT   19 12 19.3   -14 26 34     3.979    3.011    8.7    2.8   327   11.9 
2026-01-13 00:00 UT   19 13 54.5   -14 25 40     3.979    3.011    9.0    2.9   323   11.9 
2026-01-14 00:00 UT   19 15 29.5   -14 24 41     3.979    3.012    9.3    3.0   320   11.9 
2026-01-15 00:00 UT   19 17 04.5   -14 23 38     3.978    3.013    9.6    3.1   316   11.9 
2026-01-16 00:00 UT   19 18 39.3   -14 22 31     3.978    3.014   10.0    3.2   313   11.9 
2026-01-17 00:00 UT   19 20 14.0   -14 21 20     3.977    3.015   10.4    3.4   310   11.9 
2026-01-18 00:00 UT   19 21 48.6   -14 20 04     3.976    3.015   10.8    3.5   307   11.9 

    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.