(354) Eleonora
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	19 Apr 2025	10.6	2.732 AU	1.919 AU	16h31m	+05°03'	136.0°	14.8°
Opposition	19 May 2025	10.3	2.767 AU	1.833 AU	16h11m	+07°27'	151.9°	9.9°

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
2025-04-19 00:00 UT   16 31 57.2   +05 03 15     1.919    2.732  136.0   14.8   248   10.6 
2025-04-19 20:40 UT   16 31 37.7   +05 09 13     1.914    2.733  136.6   14.6   247   10.6 
2025-04-20 00:00 UT   16 31 34.5   +05 10 11     1.913    2.733  136.7   14.6   247   10.6 
2025-04-21 00:00 UT   16 31 10.3   +05 17 01     1.907    2.734  137.5   14.4   246   10.5 
2025-04-22 00:00 UT   16 30 44.7   +05 23 46     1.902    2.735  138.3   14.2   245   10.5 
2025-04-23 00:00 UT   16 30 17.7   +05 30 25     1.896    2.736  139.1   13.9   244   10.5 
2025-04-24 00:00 UT   16 29 49.3   +05 36 57     1.891    2.737  139.8   13.7   243   10.5 
2025-04-25 00:00 UT   16 29 19.6   +05 43 22     1.886    2.739  140.6   13.5   241   10.5 
2025-04-26 00:00 UT   16 28 48.6   +05 49 40     1.881    2.740  141.3   13.3   240   10.5 
2025-04-27 00:00 UT   16 28 16.3   +05 55 50     1.877    2.741  142.0   13.1   239   10.5 
2025-04-28 00:00 UT   16 27 42.7   +06 01 51     1.872    2.742  142.7   12.9   237   10.5 
2025-04-29 00:00 UT   16 27 07.9   +06 07 44     1.868    2.743  143.4   12.6   236   10.4 
2025-04-30 00:00 UT   16 26 32.0   +06 13 29     1.864    2.744  144.1   12.4   234   10.4 
2025-05-01 00:00 UT   16 25 54.9   +06 19 03     1.861    2.745  144.7   12.2   233   10.4 
2025-05-02 00:00 UT   16 25 16.7   +06 24 28     1.857    2.747  145.4   12.0   231   10.4 
2025-05-03 00:00 UT   16 24 37.4   +06 29 43     1.854    2.748  146.0   11.8   229   10.4 
2025-05-04 00:00 UT   16 23 57.1   +06 34 47     1.851    2.749  146.6   11.7   228   10.4 
2025-05-05 00:00 UT   16 23 15.8   +06 39 41     1.848    2.750  147.2   11.5   226   10.4 
2025-05-06 00:00 UT   16 22 33.7   +06 44 23     1.845    2.751  147.7   11.3   224   10.4 
2025-05-07 00:00 UT   16 21 50.6   +06 48 54     1.843    2.752  148.2   11.1   222   10.4 
2025-05-08 00:00 UT   16 21 06.7   +06 53 14     1.841    2.754  148.7   11.0   220   10.4 
2025-05-09 00:00 UT   16 20 21.9   +06 57 21     1.839    2.755  149.2   10.8   218   10.4 
2025-05-10 00:00 UT   16 19 36.5   +07 01 16     1.837    2.756  149.6   10.7   216   10.3 
2025-05-11 00:00 UT   16 18 50.3   +07 04 58     1.836    2.757  150.0   10.5   214   10.3 
2025-05-12 00:00 UT   16 18 03.5   +07 08 28     1.834    2.758  150.4   10.4   212   10.3 
2025-05-13 00:00 UT   16 17 16.1   +07 11 45     1.833    2.759  150.7   10.3   209   10.3 
2025-05-14 00:00 UT   16 16 28.1   +07 14 48     1.833    2.760  151.0   10.2   207   10.3 
2025-05-15 00:00 UT   16 15 39.7   +07 17 38     1.832    2.762  151.3   10.1   205   10.3 
2025-05-16 00:00 UT   16 14 50.8   +07 20 14     1.832    2.763  151.5   10.1   202   10.3 
2025-05-17 00:00 UT   16 14 01.4   +07 22 36     1.832    2.764  151.7   10.0   200   10.3 
2025-05-18 00:00 UT   16 13 11.8   +07 24 45     1.832    2.765  151.8   10.0   197   10.3 
2025-05-19 00:00 UT   16 12 21.8   +07 26 38     1.833    2.766  151.9    9.9   195   10.3 

    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.