(13) Egeria
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	18 Nov 2025	12.1	2.418 AU	2.964 AU	12h47m	+06°35'	48.1°	17.7°
Opposition	19 Apr 2026	10.2	2.544 AU	1.544 AU	13h57m	-04°45'	173.2°	2.7°

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 Egeria are:

            e (Eccentricity)                : 0.0846820
            a (Semimajor axis)              : 2.5762588
            i (Inclination)                 : 16.52553
            Ω (Longitude of ascending node) : 43.17717
            ω (Argument of perihelion)      : 79.06456
            M (Mean anomaly)                : 40.99101
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 121.78264
            B (Latitude of perihelion)      : 16.21709
            P (Orbital period in years)     : 4.14            
        

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
2025-11-18 00:00 UT   12 47 56.7   +06 35 34     2.964    2.418   48.1   17.7   303   12.1 
2025-11-18 11:44 UT   12 48 42.7   +06 30 33     2.960    2.419   48.3   17.8   303   12.1 
2025-11-19 00:00 UT   12 49 30.6   +06 25 20     2.956    2.419   48.6   17.9   303   12.1 
2025-11-20 00:00 UT   12 51 04.2   +06 15 09     2.947    2.420   49.2   18.0   303   12.1 
2025-11-21 00:00 UT   12 52 37.4   +06 05 01     2.938    2.420   49.7   18.2   303   12.1 
2025-11-22 00:00 UT   12 54 10.3   +05 54 57     2.929    2.421   50.3   18.3   302   12.1 
2025-11-23 00:00 UT   12 55 42.8   +05 44 56     2.920    2.422   50.9   18.4   302   12.1 
2025-11-24 00:00 UT   12 57 14.9   +05 34 59     2.911    2.422   51.4   18.6   302   12.1 
2025-11-25 00:00 UT   12 58 46.7   +05 25 06     2.902    2.423   52.0   18.7   302   12.1 
2025-11-26 00:00 UT   13 00 18.1   +05 15 17     2.893    2.424   52.6   18.9   301   12.1 
2025-11-27 00:00 UT   13 01 49.1   +05 05 31     2.884    2.424   53.2   19.0   301   12.1 
2025-11-28 00:00 UT   13 03 19.7   +04 55 50     2.874    2.425   53.7   19.2   301   12.1 
2025-11-29 00:00 UT   13 04 49.9   +04 46 12     2.865    2.426   54.3   19.3   301   12.1 
2025-11-30 00:00 UT   13 06 19.7   +04 36 38     2.855    2.427   54.9   19.4   301   12.1 
2025-12-01 00:00 UT   13 07 49.0   +04 27 08     2.846    2.427   55.5   19.6   300   12.1 
2025-12-02 00:00 UT   13 09 18.0   +04 17 42     2.836    2.428   56.1   19.7   300   12.1 
2025-12-03 00:00 UT   13 10 46.6   +04 08 20     2.826    2.429   56.7   19.8   300   12.1 
2025-12-04 00:00 UT   13 12 14.7   +03 59 02     2.816    2.429   57.3   20.0   300   12.1 
2025-12-05 00:00 UT   13 13 42.4   +03 49 48     2.806    2.430   57.9   20.1   299   12.1 
2025-12-06 00:00 UT   13 15 09.7   +03 40 39     2.796    2.431   58.5   20.2   299   12.1 
2025-12-07 00:00 UT   13 16 36.5   +03 31 33     2.786    2.432   59.1   20.3   299   12.1 
2025-12-08 00:00 UT   13 18 02.9   +03 22 32     2.776    2.432   59.7   20.5   299   12.1 

    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.