(433) Eros
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	24 Oct 2025	10.5	1.388 AU	0.454 AU	01h22m	+46°54'	144.1°	24.8°

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)                : 0.2228360
            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.

Ephemerides:

Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2025-10-24 00:00 UT   01 22 24.4   +46 54 51     0.454    1.388  144.1   24.8   167   10.5 
2025-10-24 23:54 UT   01 20 16.9   +46 58 24     0.451    1.385  144.2   24.9   164   10.5 
2025-10-25 00:00 UT   01 20 16.3   +46 58 25     0.451    1.385  144.2   24.9   164   10.5 
2025-10-26 00:00 UT   01 18 07.5   +47 01 04     0.447    1.382  144.2   24.9   162   10.5 
2025-10-27 00:00 UT   01 15 58.1   +47 02 47     0.444    1.379  144.1   25.0   159   10.5 
2025-10-28 00:00 UT   01 13 48.7   +47 03 35     0.441    1.375  144.0   25.1   157   10.5 
2025-10-29 00:00 UT   01 11 39.6   +47 03 27     0.438    1.372  143.9   25.2   154   10.4 
2025-10-30 00:00 UT   01 09 31.0   +47 02 24     0.435    1.369  143.8   25.4   152   10.4 
2025-10-31 00:00 UT   01 07 23.5   +47 00 25     0.433    1.366  143.6   25.5   149   10.4 
2025-11-01 00:00 UT   01 05 17.3   +46 57 32     0.430    1.362  143.4   25.7   147   10.4 
2025-11-02 00:00 UT   01 03 12.7   +46 53 44     0.428    1.359  143.2   25.9   144   10.4 
2025-11-03 00:00 UT   01 01 10.1   +46 49 02     0.425    1.356  142.9   26.2   142   10.4 
2025-11-04 00:00 UT   00 59 09.9   +46 43 28     0.423    1.353  142.6   26.4   139   10.4 
2025-11-05 00:00 UT   00 57 12.2   +46 37 02     0.421    1.349  142.3   26.7   137   10.4 
2025-11-06 00:00 UT   00 55 17.5   +46 29 45     0.419    1.346  141.9   27.0   135   10.3 
2025-11-07 00:00 UT   00 53 26.0   +46 21 39     0.417    1.343  141.6   27.3   132   10.3 
2025-11-08 00:00 UT   00 51 38.1   +46 12 44     0.415    1.340  141.1   27.6   130   10.3 
2025-11-09 00:00 UT   00 49 53.8   +46 03 03     0.413    1.336  140.7   28.0   128   10.3 
2025-11-10 00:00 UT   00 48 13.6   +45 52 37     0.412    1.333  140.3   28.4   126   10.3 
2025-11-11 00:00 UT   00 46 37.7   +45 41 26     0.410    1.330  139.8   28.7   123   10.3 
2025-11-12 00:00 UT   00 45 06.2   +45 29 34     0.409    1.327  139.3   29.1   121   10.3 
2025-11-13 00:00 UT   00 43 39.4   +45 17 02     0.407    1.324  138.7   29.5   119   10.3 
2025-11-14 00:00 UT   00 42 17.6   +45 03 52     0.406    1.320  138.2   30.0   117   10.3 
2025-11-15 00:00 UT   00 41 00.8   +44 50 06     0.405    1.317  137.7   30.4   115   10.3 
2025-11-16 00:00 UT   00 39 49.3   +44 35 46     0.404    1.314  137.1   30.8   114   10.3 
2025-11-17 00:00 UT   00 38 43.2   +44 20 54     0.403    1.311  136.5   31.3   112   10.3 
2025-11-18 00:00 UT   00 37 42.6   +44 05 34     0.402    1.308  135.9   31.7   110   10.3 

    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.