(354) Eleonora
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	3 Apr 2026	12.2	3.066 AU	3.497 AU	21h08m	-10°34'	56.8°	15.8°
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)                 : 18.36128
            Ω (Longitude of ascending node) : 140.20579
            ω (Argument of perihelion)      : 8.12172
            M (Mean anomaly)                : 116.41401
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 147.91913
            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
2026-04-03 00:00 UT   21 08 03.5   -10 34 49     3.497    3.066   56.8   15.8   257   12.2 
2026-04-03 23:34 UT   21 09 12.9   -10 31 13     3.486    3.066   57.5   16.0   257   12.2 
2026-04-04 00:00 UT   21 09 14.2   -10 31 09     3.486    3.066   57.5   16.0   257   12.2 
2026-04-05 00:00 UT   21 10 24.3   -10 27 29     3.474    3.067   58.2   16.1   256   12.2 
2026-04-06 00:00 UT   21 11 33.9   -10 23 51     3.463    3.067   58.9   16.2   256   12.2 
2026-04-07 00:00 UT   21 12 43.0   -10 20 13     3.451    3.068   59.5   16.3   256   12.2 
2026-04-08 00:00 UT   21 13 51.5   -10 16 37     3.440    3.068   60.2   16.5   256   12.2 
2026-04-09 00:00 UT   21 14 59.5   -10 13 02     3.428    3.069   60.9   16.6   256   12.2 
2026-04-10 00:00 UT   21 16 07.0   -10 09 29     3.416    3.070   61.6   16.7   255   12.2 
2026-04-11 00:00 UT   21 17 13.9   -10 05 57     3.405    3.070   62.3   16.8   255   12.2 
2026-04-12 00:00 UT   21 18 20.3   -10 02 26     3.393    3.071   63.0   16.9   255   12.2 
2026-04-13 00:00 UT   21 19 26.1   -09 58 57     3.381    3.071   63.7   17.0   255   12.2 
2026-04-14 00:00 UT   21 20 31.4   -09 55 30     3.369    3.072   64.4   17.1   255   12.2 
2026-04-15 00:00 UT   21 21 36.0   -09 52 05     3.356    3.072   65.1   17.2   255   12.1 
2026-04-16 00:00 UT   21 22 40.1   -09 48 42     3.344    3.073   65.8   17.3   254   12.1 
2026-04-17 00:00 UT   21 23 43.6   -09 45 20     3.332    3.073   66.5   17.4   254   12.1 
2026-04-18 00:00 UT   21 24 46.4   -09 42 01     3.319    3.074   67.2   17.5   254   12.1 
2026-04-19 00:00 UT   21 25 48.7   -09 38 45     3.307    3.074   68.0   17.6   254   12.1 
2026-04-20 00:00 UT   21 26 50.3   -09 35 30     3.294    3.075   68.7   17.7   254   12.1 
2026-04-21 00:00 UT   21 27 51.3   -09 32 19     3.282    3.075   69.4   17.8   254   12.1 
2026-04-22 00:00 UT   21 28 51.6   -09 29 10     3.269    3.076   70.1   17.9   253   12.1 
2026-04-23 00:00 UT   21 29 51.4   -09 26 03     3.256    3.076   70.8   18.0   253   12.1 
2026-04-24 00:00 UT   21 30 50.4   -09 22 59     3.243    3.077   71.5   18.1   253   12.1 
2026-04-25 00:00 UT   21 31 48.8   -09 19 59     3.231    3.077   72.3   18.1   253   12.1 
2026-04-26 00:00 UT   21 32 46.6   -09 17 01     3.218    3.078   73.0   18.2   253   12.1 
2026-04-27 00:00 UT   21 33 43.7   -09 14 06     3.205    3.078   73.7   18.3   253   12.1 
2026-04-28 00:00 UT   21 34 40.1   -09 11 15     3.192    3.079   74.5   18.4   253   12.1 
2026-04-29 00:00 UT   21 35 35.8   -09 08 27     3.178    3.079   75.2   18.4   252   12.1 
2026-04-30 00:00 UT   21 36 30.9   -09 05 42     3.165    3.080   75.9   18.5   252   12.1 
2026-05-01 00:00 UT   21 37 25.2   -09 03 01     3.152    3.080   76.7   18.6   252   12.1 
2026-05-02 00:00 UT   21 38 18.8   -09 00 23     3.139    3.081   77.4   18.6   252   12.1 
2026-05-03 00:00 UT   21 39 11.7   -08 57 50     3.126    3.081   78.2   18.7   252   12.0 

    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.