(354) Eleonora
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Opposition	19 May 2025	10.3	2.767 AU	1.833 AU	16h11m	+07°27'	151.9°	9.9°
Today	17 Jun 2025	10.6	2.800 AU	1.948 AU	15h50m	+06°35'	139.6°	13.6°

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)                : 0.1117700
            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
2025-06-17 00:00 UT   15 50 08.1   +06 35 06     1.948    2.800  139.6   13.6   139   10.6 
2025-06-17 05:24 UT   15 50 00.2   +06 33 57     1.949    2.800  139.4   13.7   138   10.6 
2025-06-18 00:00 UT   15 49 33.3   +06 29 54     1.955    2.801  138.8   13.8   137   10.6 
2025-06-19 00:00 UT   15 48 59.7   +06 24 30     1.963    2.802  138.1   14.0   136   10.7 
2025-06-20 00:00 UT   15 48 27.1   +06 18 55     1.970    2.803  137.3   14.2   135   10.7 
2025-06-21 00:00 UT   15 47 55.8   +06 13 08     1.978    2.804  136.6   14.4   134   10.7 
2025-06-22 00:00 UT   15 47 25.7   +06 07 10     1.986    2.805  135.8   14.6   133   10.7 
2025-06-23 00:00 UT   15 46 56.7   +06 01 02     1.994    2.807  135.0   14.8   132   10.7 
2025-06-24 00:00 UT   15 46 29.0   +05 54 43     2.003    2.808  134.2   15.0   131   10.7 
2025-06-25 00:00 UT   15 46 02.6   +05 48 14     2.011    2.809  133.4   15.2   130   10.8 
2025-06-26 00:00 UT   15 45 37.4   +05 41 36     2.020    2.810  132.7   15.4   129   10.8 
2025-06-27 00:00 UT   15 45 13.6   +05 34 47     2.029    2.811  131.9   15.6   128   10.8 
2025-06-28 00:00 UT   15 44 51.0   +05 27 49     2.038    2.812  131.1   15.8   128   10.8 
2025-06-29 00:00 UT   15 44 29.8   +05 20 42     2.047    2.813  130.3   16.0   127   10.8 
2025-06-30 00:00 UT   15 44 09.9   +05 13 27     2.057    2.815  129.5   16.2   126   10.8 
2025-07-01 00:00 UT   15 43 51.3   +05 06 03     2.066    2.816  128.7   16.4   125   10.9 
2025-07-02 00:00 UT   15 43 34.1   +04 58 31     2.076    2.817  127.9   16.6   124   10.9 
2025-07-03 00:00 UT   15 43 18.2   +04 50 51     2.086    2.818  127.1   16.7   124   10.9 
2025-07-04 00:00 UT   15 43 03.7   +04 43 04     2.096    2.819  126.3   16.9   123   10.9 
2025-07-05 00:00 UT   15 42 50.6   +04 35 09     2.106    2.820  125.5   17.1   122   10.9 
2025-07-06 00:00 UT   15 42 38.8   +04 27 08     2.116    2.821  124.7   17.2   122   11.0 
2025-07-07 00:00 UT   15 42 28.3   +04 18 60     2.127    2.823  123.9   17.4   121   11.0 
2025-07-08 00:00 UT   15 42 19.3   +04 10 45     2.137    2.824  123.1   17.6   120   11.0 
2025-07-09 00:00 UT   15 42 11.5   +04 02 24     2.148    2.825  122.3   17.7   120   11.0 
2025-07-10 00:00 UT   15 42 05.2   +03 53 58     2.159    2.826  121.5   17.9   119   11.0 
2025-07-11 00:00 UT   15 42 00.2   +03 45 26     2.170    2.827  120.7   18.0   119   11.0 
2025-07-12 00:00 UT   15 41 56.5   +03 36 48     2.181    2.828  119.9   18.2   118   11.1 
2025-07-13 00:00 UT   15 41 54.2   +03 28 06     2.192    2.829  119.1   18.3   117   11.1 
2025-07-14 00:00 UT   15 41 53.2   +03 19 18     2.204    2.830  118.3   18.4   117   11.1 
2025-07-15 00:00 UT   15 41 53.6   +03 10 26     2.215    2.832  117.5   18.6   116   11.1 
2025-07-16 00:00 UT   15 41 55.3   +03 01 29     2.227    2.833  116.7   18.7   116   11.1 
2025-07-17 00:00 UT   15 41 58.3   +02 52 28     2.239    2.834  115.9   18.8   115   11.1 

    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.