(230) Athamantis
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	5 Feb 2025	12.8	2.481 AU	2.936 AU	17h27m	-22°39'	53.6°	18.7°
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)                : 0.0613235
            a (Semimajor axis)              : 2.3823656
            i (Inclination)                 : 9.45539
            Ω (Longitude of ascending node) : 239.77145
            ω (Argument of perihelion)      : 139.08572
            M (Mean anomaly)                : 200.44629
            Epoch                           : 2024 Oct 17

            L (Longitude of perihelion)     : 199.24469
            B (Latitude of perihelion)      : 6.17650
            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
2025-02-05 00:00 UT   17 27 30.5   -22 39 12     2.936    2.481   53.6   18.7   274   12.8 
2025-02-05 08:41 UT   17 28 08.5   -22 38 54     2.932    2.481   53.8   18.7   274   12.8 
2025-02-06 00:00 UT   17 29 15.4   -22 38 20     2.925    2.480   54.2   18.8   273   12.8 
2025-02-07 00:00 UT   17 30 59.8   -22 37 23     2.914    2.480   54.8   19.0   273   12.8 
2025-02-08 00:00 UT   17 32 43.8   -22 36 20     2.903    2.479   55.4   19.1   273   12.8 
2025-02-09 00:00 UT   17 34 27.4   -22 35 12     2.891    2.479   56.0   19.3   273   12.8 
2025-02-10 00:00 UT   17 36 10.6   -22 33 58     2.880    2.478   56.6   19.4   273   12.8 
2025-02-11 00:00 UT   17 37 53.3   -22 32 38     2.868    2.478   57.3   19.6   273   12.8 
2025-02-12 00:00 UT   17 39 35.6   -22 31 13     2.857    2.477   57.9   19.7   273   12.8 
2025-02-13 00:00 UT   17 41 17.4   -22 29 43     2.845    2.477   58.5   19.9   272   12.8 
2025-02-14 00:00 UT   17 42 58.8   -22 28 07     2.834    2.476   59.1   20.0   272   12.8 
2025-02-15 00:00 UT   17 44 39.6   -22 26 26     2.822    2.476   59.7   20.2   272   12.7 
2025-02-16 00:00 UT   17 46 20.0   -22 24 39     2.810    2.475   60.4   20.3   272   12.7 
2025-02-17 00:00 UT   17 47 59.9   -22 22 47     2.798    2.475   61.0   20.4   272   12.7 
2025-02-18 00:00 UT   17 49 39.3   -22 20 49     2.786    2.474   61.6   20.6   272   12.7 
2025-02-19 00:00 UT   17 51 18.1   -22 18 46     2.774    2.474   62.3   20.7   271   12.7 
2025-02-20 00:00 UT   17 52 56.5   -22 16 38     2.762    2.473   62.9   20.8   271   12.7 
2025-02-21 00:00 UT   17 54 34.3   -22 14 25     2.750    2.473   63.5   21.0   271   12.7 
2025-02-22 00:00 UT   17 56 11.5   -22 12 06     2.738    2.472   64.1   21.1   271   12.7 
2025-02-23 00:00 UT   17 57 48.1   -22 09 42     2.726    2.472   64.8   21.2   271   12.7 
2025-02-24 00:00 UT   17 59 24.2   -22 07 13     2.713    2.471   65.4   21.4   271   12.7 
2025-02-25 00:00 UT   18 00 59.7   -22 04 39     2.701    2.471   66.1   21.5   271   12.7 
2025-02-26 00:00 UT   18 02 34.6   -22 01 60     2.688    2.470   66.7   21.6   270   12.7 
2025-02-27 00:00 UT   18 04 08.8   -21 59 16     2.676    2.470   67.3   21.7   270   12.7 

    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.