(13) Egeria
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Opposition	2 Dec 2024	10.1	2.427 AU	1.457 AU	04h28m	+35°03'	166.9°	5.3°
Today	22 Dec 2024	10.4	2.414 AU	1.501 AU	04h05m	+35°51'	152.0°	11.0°

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)                : 0.0854027
            a (Semimajor axis)              : 2.5777354
            i (Inclination)                 : 16.53187
            Ω (Longitude of ascending node) : 43.20800
            ω (Argument of perihelion)      : 79.22238
            M (Mean anomaly)                : 305.54672
            Epoch                           : 2024 Oct 17

            L (Longitude of perihelion)     : 121.97722
            B (Latitude of perihelion)      : 16.23211
            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
2024-12-22 00:00 UT   04 05 05.5   +35 51 42     1.501    2.414  152.0   11.0   108   10.4 
2024-12-22 18:41 UT   04 04 18.6   +35 52 18     1.505    2.414  151.2   11.3   107   10.4 
2024-12-23 00:00 UT   04 04 05.4   +35 52 28     1.506    2.414  151.0   11.4   107   10.4 
2024-12-24 00:00 UT   04 03 07.2   +35 53 06     1.511    2.413  149.9   11.8   106   10.4 
2024-12-25 00:00 UT   04 02 10.9   +35 53 37     1.516    2.412  148.8   12.2   104   10.5 
2024-12-26 00:00 UT   04 01 16.5   +35 54 01     1.522    2.412  147.8   12.6   103   10.5 
2024-12-27 00:00 UT   04 00 24.2   +35 54 18     1.528    2.411  146.7   12.9   102   10.5 
2024-12-28 00:00 UT   03 59 34.0   +35 54 30     1.534    2.410  145.6   13.3   101   10.5 
2024-12-29 00:00 UT   03 58 45.9   +35 54 36     1.540    2.410  144.6   13.7   100   10.5 
2024-12-30 00:00 UT   03 58 00.1   +35 54 37     1.546    2.409  143.5   14.1    99   10.6 
2024-12-31 00:00 UT   03 57 16.4   +35 54 33     1.553    2.408  142.4   14.4    98   10.6 
2025-01-01 00:00 UT   03 56 35.0   +35 54 25     1.560    2.408  141.4   14.8    98   10.6 
2025-01-02 00:00 UT   03 55 55.9   +35 54 13     1.567    2.407  140.3   15.1    97   10.6 
2025-01-03 00:00 UT   03 55 19.1   +35 53 58     1.574    2.407  139.3   15.5    96   10.7 
2025-01-04 00:00 UT   03 54 44.7   +35 53 39     1.582    2.406  138.2   15.8    95   10.7 
2025-01-05 00:00 UT   03 54 12.6   +35 53 18     1.589    2.405  137.2   16.1    95   10.7 
2025-01-06 00:00 UT   03 53 42.9   +35 52 55     1.597    2.405  136.1   16.5    94   10.7 
2025-01-07 00:00 UT   03 53 15.7   +35 52 29     1.605    2.404  135.1   16.8    93   10.7 
2025-01-08 00:00 UT   03 52 50.8   +35 52 03     1.613    2.403  134.1   17.1    93   10.8 
2025-01-09 00:00 UT   03 52 28.3   +35 51 35     1.622    2.403  133.0   17.4    92   10.8 
2025-01-10 00:00 UT   03 52 08.3   +35 51 06     1.630    2.402  132.0   17.7    92   10.8 
2025-01-11 00:00 UT   03 51 50.6   +35 50 36     1.639    2.402  131.0   18.0    91   10.8 
2025-01-12 00:00 UT   03 51 35.4   +35 50 06     1.648    2.401  130.0   18.3    91   10.8 
2025-01-13 00:00 UT   03 51 22.5   +35 49 36     1.657    2.401  129.0   18.6    90   10.9 
2025-01-14 00:00 UT   03 51 12.0   +35 49 07     1.666    2.400  128.0   18.8    90   10.9 
2025-01-15 00:00 UT   03 51 03.9   +35 48 37     1.675    2.399  127.0   19.1    89   10.9 
2025-01-16 00:00 UT   03 50 58.2   +35 48 09     1.684    2.399  126.0   19.4    89   10.9 
2025-01-17 00:00 UT   03 50 54.8   +35 47 41     1.694    2.398  125.1   19.6    88   10.9 
2025-01-18 00:00 UT   03 50 53.8   +35 47 14     1.704    2.398  124.1   19.9    88   11.0 
2025-01-19 00:00 UT   03 50 55.1   +35 46 49     1.713    2.397  123.1   20.1    88   11.0 
2025-01-20 00:00 UT   03 50 58.7   +35 46 25     1.723    2.397  122.2   20.3    87   11.0 
2025-01-21 00:00 UT   03 51 04.6   +35 46 02     1.733    2.396  121.2   20.6    87   11.0 

    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.