(354) Eleonora
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	8 Aug 2025	11.5	2.858 AU	2.517 AU	15h48m	-00°36'	99.1°	20.5°
Opposition	15 Aug 2026	10.3	3.111 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)                : 0.1117701
            a (Semimajor axis)              : 2.8004273
            i (Inclination)                 : 18.36042
            Ω (Longitude of ascending node) : 140.21125
            ω (Argument of perihelion)      : 8.06410
            M (Mean anomaly)                : 74.41705
            Epoch                           : 2025 May 05

            L (Longitude of perihelion)     : 147.86984
            B (Latitude of perihelion)      : 2.53259
            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. 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
2025-08-08 00:00 UT   15 48 25.0   +00 36 49     2.517    2.858   99.1   20.5   106   11.5 
2025-08-08 08:37 UT   15 48 36.0   +00 40 18     2.522    2.859   98.8   20.5   106   11.5 
2025-08-09 00:00 UT   15 48 56.1   +00 46 32     2.531    2.860   98.3   20.5   106   11.5 
2025-08-10 00:00 UT   15 49 28.4   +00 56 16     2.544    2.861   97.6   20.6   106   11.5 
2025-08-11 00:00 UT   15 50 01.7   -01 05 59     2.558    2.862   96.9   20.6   105   11.5 
2025-08-12 00:00 UT   15 50 36.1   -01 15 42     2.571    2.863   96.1   20.6   105   11.5 
2025-08-13 00:00 UT   15 51 11.5   -01 25 24     2.585    2.864   95.4   20.6   105   11.5 
2025-08-14 00:00 UT   15 51 47.9   -01 35 06     2.598    2.865   94.7   20.6   104   11.5 
2025-08-15 00:00 UT   15 52 25.4   -01 44 47     2.612    2.866   94.0   20.6   104   11.6 
2025-08-16 00:00 UT   15 53 03.9   -01 54 28     2.626    2.867   93.3   20.6   104   11.6 
2025-08-17 00:00 UT   15 53 43.3   -02 04 07     2.639    2.868   92.5   20.6   103   11.6 
2025-08-18 00:00 UT   15 54 23.8   -02 13 45     2.653    2.869   91.8   20.6   103   11.6 
2025-08-19 00:00 UT   15 55 05.3   -02 23 23     2.667    2.871   91.1   20.6   103   11.6 
2025-08-20 00:00 UT   15 55 47.7   -02 32 59     2.680    2.872   90.4   20.6   103   11.6 
2025-08-21 00:00 UT   15 56 31.1   -02 42 34     2.694    2.873   89.7   20.6   102   11.6 
2025-08-22 00:00 UT   15 57 15.4   -02 52 07     2.708    2.874   89.0   20.6   102   11.6 
2025-08-23 00:00 UT   15 58 00.7   -03 01 39     2.722    2.875   88.3   20.6   102   11.6 
2025-08-24 00:00 UT   15 58 46.9   -03 11 09     2.736    2.876   87.6   20.6   101   11.7 
2025-08-25 00:00 UT   15 59 34.0   -03 20 38     2.749    2.877   86.9   20.5   101   11.7 
2025-08-26 00:00 UT   16 00 22.1   -03 30 04     2.763    2.878   86.2   20.5   101   11.7 
2025-08-27 00:00 UT   16 01 11.0   -03 39 29     2.777    2.879   85.5   20.5   101   11.7 
2025-08-28 00:00 UT   16 02 00.8   -03 48 52     2.791    2.880   84.8   20.4   100   11.7 
2025-08-29 00:00 UT   16 02 51.5   -03 58 12     2.804    2.881   84.1   20.4   100   11.7 
2025-08-30 00:00 UT   16 03 43.0   -04 07 31     2.818    2.883   83.4   20.4   100   11.7 
2025-08-31 00:00 UT   16 04 35.4   -04 16 47     2.832    2.884   82.7   20.3    99   11.7 
2025-09-01 00:00 UT   16 05 28.6   -04 26 00     2.846    2.885   82.0   20.3    99   11.7 
2025-09-02 00:00 UT   16 06 22.6   -04 35 12     2.860    2.886   81.4   20.2    99   11.7 
2025-09-03 00:00 UT   16 07 17.5   -04 44 20     2.873    2.887   80.7   20.2    99   11.8 
2025-09-04 00:00 UT   16 08 13.1   -04 53 26     2.887    2.888   80.0   20.1    98   11.8 
2025-09-05 00:00 UT   16 09 09.5   -05 02 30     2.901    2.889   79.3   20.1    98   11.8 
2025-09-06 00:00 UT   16 10 06.7   -05 11 30     2.914    2.890   78.6   20.0    98   11.8 
2025-09-07 00:00 UT   16 11 04.7   -05 20 28     2.928    2.891   78.0   19.9    98   11.8 

    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.