(13) Egeria
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	19 Dec 2025	12.0	2.440 AU	2.660 AU	13h33m	+01°48'	66.5°	21.7°
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
2025-12-19 00:00 UT   13 33 21.2   +01 48 17     2.660    2.440   66.5   21.7   297   12.0 
2025-12-19 09:50 UT   13 33 54.2   +01 44 57     2.655    2.441   66.8   21.7   296   12.0 
2025-12-20 00:00 UT   13 34 41.5   +01 40 11     2.649    2.441   67.1   21.8   296   12.0 
2025-12-21 00:00 UT   13 36 01.2   +01 32 10     2.638    2.442   67.8   21.9   296   12.0 
2025-12-22 00:00 UT   13 37 20.3   +01 24 14     2.627    2.443   68.4   22.0   296   12.0 
2025-12-23 00:00 UT   13 38 38.9   +01 16 24     2.616    2.443   69.1   22.1   296   12.0 
2025-12-24 00:00 UT   13 39 56.8   +01 08 38     2.604    2.444   69.7   22.2   296   12.0 
2025-12-25 00:00 UT   13 41 14.1   +01 00 57     2.593    2.445   70.4   22.3   295   12.0 
2025-12-26 00:00 UT   13 42 30.8   +00 53 21     2.582    2.446   71.0   22.4   295   12.0 
2025-12-27 00:00 UT   13 43 46.8   +00 45 51     2.570    2.446   71.7   22.4   295   12.0 
2025-12-28 00:00 UT   13 45 02.2   +00 38 25     2.559    2.447   72.3   22.5   295   12.0 
2025-12-29 00:00 UT   13 46 16.9   +00 31 05     2.547    2.448   73.0   22.6   295   12.0 
2025-12-30 00:00 UT   13 47 30.9   +00 23 50     2.536    2.449   73.7   22.7   294   12.0 
2025-12-31 00:00 UT   13 48 44.3   +00 16 40     2.524    2.449   74.3   22.7   294   12.0 
2026-01-01 00:00 UT   13 49 56.9   +00 09 35     2.513    2.450   75.0   22.8   294   11.9 
2026-01-02 00:00 UT   13 51 08.8   +00 02 36     2.501    2.451   75.7   22.9   294   11.9 
2026-01-03 00:00 UT   13 52 20.1   +00 04 18     2.489    2.452   76.4   22.9   294   11.9 
2026-01-04 00:00 UT   13 53 30.5   +00 11 07     2.478    2.453   77.1   23.0   293   11.9 
2026-01-05 00:00 UT   13 54 40.3   +00 17 51     2.466    2.453   77.8   23.1   293   11.9 
2026-01-06 00:00 UT   13 55 49.3   +00 24 29     2.454    2.454   78.4   23.1   293   11.9 
2026-01-07 00:00 UT   13 56 57.5   +00 31 02     2.442    2.455   79.1   23.2   293   11.9 
2026-01-08 00:00 UT   13 58 04.9   +00 37 30     2.430    2.456   79.8   23.2   293   11.9 
2026-01-09 00:00 UT   13 59 11.5   +00 43 52     2.418    2.457   80.5   23.3   292   11.9 
2026-01-10 00:00 UT   14 00 17.3   +00 50 08     2.406    2.457   81.3   23.3   292   11.9 
2026-01-11 00:00 UT   14 01 22.2   +00 56 20     2.394    2.458   82.0   23.3   292   11.9 
2026-01-12 00:00 UT   14 02 26.3   -01 02 25     2.382    2.459   82.7   23.4   292   11.9 
2026-01-13 00:00 UT   14 03 29.5   -01 08 25     2.370    2.460   83.4   23.4   292   11.8 
2026-01-14 00:00 UT   14 04 31.8   -01 14 19     2.358    2.461   84.1   23.4   291   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.