(433) Eros
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	15 Sep 2025	11.8	1.512 AU	0.679 AU	02h03m	+36°44'	126.6°	32.3°

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 Eros are:

            e (Eccentricity)                : 0.2228359
            a (Semimajor axis)              : 1.4581210
            i (Inclination)                 : 10.82847
            Ω (Longitude of ascending node) : 304.27008
            ω (Argument of perihelion)      : 178.92978
            M (Mean anomaly)                : 310.55432
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 303.21891
            B (Latitude of perihelion)      : 0.20105
            P (Orbital period in years)     : 1.76            
        

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
2025-09-15 00:00 UT   02 03 47.7   +36 44 10     0.679    1.512  126.6   32.3   230   11.8 
2025-09-15 14:35 UT   02 03 51.8   +36 57 03     0.674    1.510  126.9   32.2   230   11.8 
2025-09-16 00:00 UT   02 03 53.8   +37 05 21     0.671    1.509  127.2   32.1   230   11.8 
2025-09-17 00:00 UT   02 03 56.9   +37 26 27     0.664    1.506  127.8   31.8   229   11.7 
2025-09-18 00:00 UT   02 03 56.7   +37 47 30     0.656    1.503  128.4   31.6   228   11.7 
2025-09-19 00:00 UT   02 03 53.3   +38 08 27     0.648    1.500  129.0   31.4   227   11.7 
2025-09-20 00:00 UT   02 03 46.5   +38 29 19     0.641    1.497  129.6   31.1   226   11.6 
2025-09-21 00:00 UT   02 03 36.3   +38 50 04     0.634    1.494  130.2   30.9   225   11.6 
2025-09-22 00:00 UT   02 03 22.6   +39 10 41     0.626    1.491  130.8   30.6   224   11.6 
2025-09-23 00:00 UT   02 03 05.3   +39 31 09     0.619    1.487  131.4   30.4   223   11.5 
2025-09-24 00:00 UT   02 02 44.4   +39 51 28     0.612    1.484  132.0   30.1   222   11.5 
2025-09-25 00:00 UT   02 02 19.8   +40 11 37     0.605    1.481  132.6   29.9   221   11.4 
2025-09-26 00:00 UT   02 01 51.3   +40 31 34     0.598    1.478  133.2   29.6   220   11.4 
2025-09-27 00:00 UT   02 01 19.1   +40 51 18     0.592    1.475  133.8   29.4   219   11.4 
2025-09-28 00:00 UT   02 00 43.0   +41 10 48     0.585    1.472  134.4   29.1   217   11.3 
2025-09-29 00:00 UT   02 00 02.9   +41 30 03     0.579    1.469  134.9   28.9   216   11.3 
2025-09-30 00:00 UT   01 59 18.8   +41 49 02     0.572    1.466  135.5   28.6   215   11.3 
2025-10-01 00:00 UT   01 58 30.7   +42 07 43     0.566    1.462  136.0   28.4   213   11.2 
2025-10-02 00:00 UT   01 57 38.6   +42 26 05     0.560    1.459  136.6   28.1   212   11.2 
2025-10-03 00:00 UT   01 56 42.3   +42 44 06     0.554    1.456  137.1   27.9   211   11.2 
2025-10-04 00:00 UT   01 55 42.0   +43 01 46     0.548    1.453  137.7   27.6   209   11.1 
2025-10-05 00:00 UT   01 54 37.6   +43 19 01     0.542    1.450  138.2   27.4   207   11.1 
2025-10-06 00:00 UT   01 53 29.0   +43 35 52     0.536    1.447  138.7   27.2   206   11.1 
2025-10-07 00:00 UT   01 52 16.3   +43 52 17     0.531    1.443  139.2   26.9   204   11.0 
2025-10-08 00:00 UT   01 50 59.5   +44 08 12     0.525    1.440  139.6   26.7   202   11.0 
2025-10-09 00:00 UT   01 49 38.6   +44 23 38     0.520    1.437  140.1   26.5   200   11.0 
2025-10-10 00:00 UT   01 48 13.7   +44 38 32     0.515    1.434  140.5   26.3   199   10.9 

    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.