(433) Eros
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	10 Oct 2025	10.9	1.434 AU	0.515 AU	01h48m	+44°38'	140.5°	26.3°

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)                : 0.2228360
            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. 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
2025-10-10 00:00 UT   01 48 13.6   +44 38 32     0.515    1.434  140.5   26.3   199   10.9 
2025-10-10 04:36 UT   01 47 56.9   +44 41 20     0.514    1.433  140.6   26.3   198   10.9 
2025-10-11 00:00 UT   01 46 44.7   +44 52 53     0.509    1.430  140.9   26.1   197   10.9 
2025-10-12 00:00 UT   01 45 11.8   +45 06 37     0.504    1.427  141.3   25.9   195   10.9 
2025-10-13 00:00 UT   01 43 35.1   +45 19 45     0.500    1.424  141.7   25.7   193   10.8 
2025-10-14 00:00 UT   01 41 54.6   +45 32 13     0.495    1.421  142.1   25.6   191   10.8 
2025-10-15 00:00 UT   01 40 10.6   +45 44 00     0.490    1.418  142.4   25.4   188   10.8 
2025-10-16 00:00 UT   01 38 23.0   +45 55 05     0.486    1.414  142.7   25.3   186   10.7 
2025-10-17 00:00 UT   01 36 32.3   +46 05 24     0.481    1.411  143.0   25.2   184   10.7 
2025-10-18 00:00 UT   01 34 38.4   +46 14 58     0.477    1.408  143.2   25.1   182   10.7 
2025-10-19 00:00 UT   01 32 41.7   +46 23 44     0.473    1.405  143.5   25.0   179   10.7 
2025-10-20 00:00 UT   01 30 42.3   +46 31 41     0.469    1.401  143.7   24.9   177   10.6 
2025-10-21 00:00 UT   01 28 40.6   +46 38 47     0.465    1.398  143.8   24.9   174   10.6 
2025-10-22 00:00 UT   01 26 36.9   +46 45 01     0.461    1.395  144.0   24.8   172   10.6 
2025-10-23 00:00 UT   01 24 31.4   +46 50 23     0.457    1.392  144.1   24.8   169   10.6 
2025-10-24 00:00 UT   01 22 24.4   +46 54 51     0.454    1.388  144.1   24.8   167   10.5 
2025-10-25 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 

    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.