(433) Eros
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	23 Nov 2025	10.4	1.292 AU	0.399 AU	00h34m	+42°42'	132.8°	34.1°

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
2025-11-23 00:00 UT   00 34 05.9   +42 42 48     0.399    1.292  132.8   34.1   102   10.4 
2025-11-23 22:44 UT   00 33 41.3   +42 26 14     0.399    1.289  132.1   34.6   101   10.4 
2025-11-24 00:00 UT   00 33 40.1   +42 25 18     0.399    1.289  132.1   34.6   101   10.4 
2025-11-25 00:00 UT   00 33 20.3   +42 07 34     0.398    1.286  131.5   35.1    99   10.4 
2025-11-26 00:00 UT   00 33 06.4   +41 49 39     0.398    1.283  130.8   35.6    98   10.4 
2025-11-27 00:00 UT   00 32 58.4   +41 31 33     0.398    1.280  130.1   36.1    97   10.4 
2025-11-28 00:00 UT   00 32 56.3   +41 13 19     0.398    1.277  129.5   36.6    96   10.4 
2025-11-29 00:00 UT   00 32 59.9   +40 54 59     0.398    1.274  128.8   37.1    94   10.4 
2025-11-30 00:00 UT   00 33 09.4   +40 36 33     0.398    1.271  128.2   37.6    93   10.4 
2025-12-01 00:00 UT   00 33 24.5   +40 18 05     0.398    1.268  127.5   38.1    92   10.4 
2025-12-02 00:00 UT   00 33 45.2   +39 59 34     0.398    1.265  126.8   38.6    91   10.4 
2025-12-03 00:00 UT   00 34 11.5   +39 41 03     0.398    1.262  126.2   39.1    90   10.4 
2025-12-04 00:00 UT   00 34 43.2   +39 22 32     0.398    1.259  125.5   39.6    89   10.5 
2025-12-05 00:00 UT   00 35 20.4   +39 04 03     0.398    1.256  124.9   40.1    88   10.5 
2025-12-06 00:00 UT   00 36 02.8   +38 45 36     0.399    1.253  124.2   40.6    87   10.5 
2025-12-07 00:00 UT   00 36 50.4   +38 27 12     0.399    1.251  123.6   41.0    86   10.5 
2025-12-08 00:00 UT   00 37 43.1   +38 08 53     0.399    1.248  122.9   41.5    86   10.5 
2025-12-09 00:00 UT   00 38 40.9   +37 50 38     0.400    1.245  122.3   42.0    85   10.5 
2025-12-10 00:00 UT   00 39 43.7   +37 32 30     0.400    1.242  121.6   42.5    84   10.5 
2025-12-11 00:00 UT   00 40 51.4   +37 14 27     0.400    1.239  121.0   42.9    83   10.5 
2025-12-12 00:00 UT   00 42 03.9   +36 56 32     0.401    1.237  120.4   43.4    83   10.5 
2025-12-13 00:00 UT   00 43 21.1   +36 38 44     0.401    1.234  119.7   43.8    82   10.5 
2025-12-14 00:00 UT   00 44 43.1   +36 21 05     0.402    1.231  119.1   44.3    81   10.6 
2025-12-15 00:00 UT   00 46 09.6   +36 03 35     0.403    1.229  118.5   44.7    81   10.6 
2025-12-16 00:00 UT   00 47 40.7   +35 46 14     0.403    1.226  117.9   45.2    80   10.6 
2025-12-17 00:00 UT   00 49 16.3   +35 29 03     0.404    1.223  117.3   45.6    80   10.6 
2025-12-18 00:00 UT   00 50 56.2   +35 12 02     0.404    1.221  116.7   46.1    79   10.6 

    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.