(13) Egeria
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	31 Aug 2025	11.9	2.376 AU	3.349 AU	10h29m	+21°35'	13.0°	5.5°
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)                : 0.0849877
            a (Semimajor axis)              : 2.5771009
            i (Inclination)                 : 16.52551
            Ω (Longitude of ascending node) : 43.18830
            ω (Argument of perihelion)      : 79.09382
            M (Mean anomaly)                : 353.28831
            Epoch                           : 2025 May 05

            L (Longitude of perihelion)     : 121.82419
            B (Latitude of perihelion)      : 16.21871
            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. 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
2025-08-31 00:00 UT   10 29 29.5   +21 35 55     3.349    2.376   13.0    5.5   352   11.9 
2025-08-31 09:04 UT   10 30 13.1   +21 31 36     3.348    2.376   13.1    5.5   351   11.9 
2025-09-01 00:00 UT   10 31 24.9   +21 24 30     3.348    2.376   13.2    5.6   350   11.9 
2025-09-02 00:00 UT   10 33 20.0   +21 13 03     3.347    2.377   13.4    5.7   349   11.9 
2025-09-03 00:00 UT   10 35 14.8   +21 01 35     3.345    2.377   13.7    5.8   347   11.9 
2025-09-04 00:00 UT   10 37 09.3   +20 50 05     3.344    2.378   14.0    5.9   345   11.9 
2025-09-05 00:00 UT   10 39 03.6   +20 38 34     3.342    2.378   14.2    6.0   344   11.9 
2025-09-06 00:00 UT   10 40 57.6   +20 27 02     3.341    2.378   14.5    6.1   342   11.9 
2025-09-07 00:00 UT   10 42 51.3   +20 15 28     3.339    2.379   14.8    6.2   341   11.9 
2025-09-08 00:00 UT   10 44 44.8   +20 03 52     3.337    2.379   15.1    6.3   340   11.9 
2025-09-09 00:00 UT   10 46 38.0   +19 52 16     3.335    2.380   15.5    6.5   338   11.9 
2025-09-10 00:00 UT   10 48 31.0   +19 40 38     3.333    2.380   15.8    6.6   337   11.9 
2025-09-11 00:00 UT   10 50 23.7   +19 28 60     3.331    2.381   16.1    6.7   336   11.9 
2025-09-12 00:00 UT   10 52 16.2   +19 17 20     3.329    2.381   16.5    6.9   335   11.9 
2025-09-13 00:00 UT   10 54 08.4   +19 05 39     3.327    2.381   16.8    7.0   334   11.9 
2025-09-14 00:00 UT   10 56 00.3   +18 53 57     3.324    2.382   17.2    7.2   333   11.9 
2025-09-15 00:00 UT   10 57 52.0   +18 42 15     3.322    2.382   17.5    7.3   332   11.9 
2025-09-16 00:00 UT   10 59 43.4   +18 30 31     3.319    2.383   17.9    7.4   331   11.9 
2025-09-17 00:00 UT   11 01 34.6   +18 18 47     3.317    2.383   18.3    7.6   330   11.9 

    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.