(230) Athamantis
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	29 May 2025	11.3	2.415 AU	1.558 AU	19h13m	-14°22'	138.9°	16.0°
Opposition	2 Jul 2025	10.5	2.392 AU	1.386 AU	18h46m	-12°04'	169.0°	4.6°

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 Athamantis are:

            e (Eccentricity)                : 0.0611874
            a (Semimajor axis)              : 2.3825833
            i (Inclination)                 : 9.45497
            Ω (Longitude of ascending node) : 239.77081
            ω (Argument of perihelion)      : 139.09055
            M (Mean anomaly)                : 254.03342
            Epoch                           : 2025 May 05

            L (Longitude of perihelion)     : 199.24883
            B (Latitude of perihelion)      : 6.17562
            P (Orbital period in years)     : 3.68            
        

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
2025-05-29 00:00 UT   19 13 48.6   -14 22 37     1.558    2.415  138.9   16.0   254   11.3 
2025-05-29 01:27 UT   19 13 47.2   -14 22 18     1.557    2.415  138.9   16.0   254   11.3 
2025-05-30 00:00 UT   19 13 25.3   -14 17 24     1.549    2.415  139.9   15.7   253   11.2 
2025-05-31 00:00 UT   19 13 00.2   -14 12 13     1.541    2.414  140.9   15.4   253   11.2 
2025-06-01 00:00 UT   19 12 33.4   -14 07 06     1.533    2.413  141.9   15.0   252   11.2 
2025-06-02 00:00 UT   19 12 04.9   -14 02 02     1.525    2.413  142.9   14.7   252   11.2 
2025-06-03 00:00 UT   19 11 34.8   -13 57 02     1.517    2.412  143.9   14.3   251   11.1 
2025-06-04 00:00 UT   19 11 02.9   -13 52 05     1.509    2.411  145.0   14.0   251   11.1 
2025-06-05 00:00 UT   19 10 29.4   -13 47 12     1.502    2.411  146.0   13.6   250   11.1 
2025-06-06 00:00 UT   19 09 54.3   -13 42 22     1.495    2.410  147.0   13.3   249   11.1 
2025-06-07 00:00 UT   19 09 17.6   -13 37 37     1.488    2.409  148.0   12.9   249   11.0 
2025-06-08 00:00 UT   19 08 39.3   -13 32 56     1.481    2.409  149.1   12.5   248   11.0 
2025-06-09 00:00 UT   19 07 59.6   -13 28 18     1.474    2.408  150.1   12.1   247   11.0 
2025-06-10 00:00 UT   19 07 18.3   -13 23 45     1.468    2.407  151.1   11.8   246   11.0 
2025-06-11 00:00 UT   19 06 35.6   -13 19 17     1.462    2.407  152.1   11.4   246   10.9 
2025-06-12 00:00 UT   19 05 51.4   -13 14 53     1.456    2.406  153.2   11.0   245   10.9 
2025-06-13 00:00 UT   19 05 05.9   -13 10 33     1.450    2.405  154.2   10.6   244   10.9 
2025-06-14 00:00 UT   19 04 19.0   -13 06 19     1.445    2.405  155.2   10.2   242   10.9 
2025-06-15 00:00 UT   19 03 30.9   -13 02 09     1.439    2.404  156.2    9.8   241   10.8 
2025-06-16 00:00 UT   19 02 41.5   -12 58 04     1.434    2.403  157.2    9.4   240   10.8 
2025-06-17 00:00 UT   19 01 50.8   -12 54 05     1.429    2.403  158.2    9.0   238   10.8 
2025-06-18 00:00 UT   19 00 59.1   -12 50 10     1.425    2.402  159.2    8.6   237   10.8 
2025-06-19 00:00 UT   19 00 06.2   -12 46 21     1.421    2.401  160.2    8.2   235   10.7 
2025-06-20 00:00 UT   18 59 12.4   -12 42 37     1.416    2.401  161.2    7.9   233   10.7 
2025-06-21 00:00 UT   18 58 17.5   -12 38 59     1.413    2.400  162.1    7.5   231   10.7 
2025-06-22 00:00 UT   18 57 21.7   -12 35 27     1.409    2.399  163.0    7.1   228   10.7 
2025-06-23 00:00 UT   18 56 25.1   -12 32 00     1.406    2.399  163.9    6.8   226   10.7 
2025-06-24 00:00 UT   18 55 27.7   -12 28 40     1.403    2.398  164.7    6.4   223   10.6 
2025-06-25 00:00 UT   18 54 29.6   -12 25 25     1.400    2.397  165.5    6.1   219   10.6 
2025-06-26 00:00 UT   18 53 30.8   -12 22 17     1.397    2.397  166.3    5.8   216   10.6 
2025-06-27 00:00 UT   18 52 31.5   -12 19 14     1.395    2.396  166.9    5.5   212   10.6 
2025-06-28 00:00 UT   18 51 31.8   -12 16 18     1.393    2.395  167.5    5.3   207   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.