(230) Athamantis
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	24 Sep 2026	11.7	2.258 AU	1.821 AU	05h08m	+24°23'	102.3°	25.7°
Opposition	5 Dec 2026	10.0	2.293 AU	1.309 AU	04h52m	+18°31'	175.9°	1.8°

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 Athamantis are:

            e (Eccentricity)                : 0.0609515
            a (Semimajor axis)              : 2.3819680
            i (Inclination)                 : 9.45497
            Ω (Longitude of ascending node) : 239.76225
            ω (Argument of perihelion)      : 139.21205
            M (Mean anomaly)                : 1.12577
            Epoch                           : 2026 Jun 09

            L (Longitude of perihelion)     : 199.36152
            B (Latitude of perihelion)      : 6.16043
            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.

Ephemerides:

Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2026-09-24 00:00 UT   05 08 41.3   +24 23 50     1.821    2.258  102.3   25.7   265   11.7 
2026-09-24 19:16 UT   05 09 23.7   +24 22 13     1.812    2.259  102.9   25.7   265   11.7 
2026-09-25 00:00 UT   05 09 34.0   +24 21 48     1.810    2.259  103.1   25.6   265   11.7 
2026-09-26 00:00 UT   05 10 25.2   +24 19 42     1.799    2.259  103.8   25.5   265   11.6 
2026-09-27 00:00 UT   05 11 14.8   +24 17 30     1.787    2.260  104.6   25.4   265   11.6 
2026-09-28 00:00 UT   05 12 02.8   +24 15 13     1.776    2.260  105.4   25.3   265   11.6 
2026-09-29 00:00 UT   05 12 49.1   +24 12 50     1.765    2.260  106.2   25.2   265   11.6 
2026-09-30 00:00 UT   05 13 33.9   +24 10 22     1.754    2.261  107.1   25.1   265   11.6 
2026-10-01 00:00 UT   05 14 17.0   +24 07 49     1.743    2.261  107.9   24.9   265   11.6 
2026-10-02 00:00 UT   05 14 58.3   +24 05 10     1.732    2.261  108.7   24.8   265   11.5 
2026-10-03 00:00 UT   05 15 38.0   +24 02 26     1.721    2.262  109.6   24.6   265   11.5 
2026-10-04 00:00 UT   05 16 15.9   +23 59 37     1.710    2.262  110.4   24.5   265   11.5 
2026-10-05 00:00 UT   05 16 52.0   +23 56 43     1.699    2.263  111.2   24.3   265   11.5 
2026-10-06 00:00 UT   05 17 26.3   +23 53 43     1.688    2.263  112.1   24.2   265   11.5 
2026-10-07 00:00 UT   05 17 58.7   +23 50 39     1.678    2.264  113.0   24.0   266   11.5 
2026-10-08 00:00 UT   05 18 29.3   +23 47 29     1.667    2.264  113.8   23.8   266   11.4 
2026-10-09 00:00 UT   05 18 58.0   +23 44 13     1.657    2.264  114.7   23.6   266   11.4 
2026-10-10 00:00 UT   05 19 24.8   +23 40 53     1.646    2.265  115.6   23.4   266   11.4 
2026-10-11 00:00 UT   05 19 49.7   +23 37 28     1.636    2.265  116.5   23.2   266   11.4 
2026-10-12 00:00 UT   05 20 12.6   +23 33 57     1.625    2.266  117.4   23.0   266   11.4 
2026-10-13 00:00 UT   05 20 33.5   +23 30 22     1.615    2.266  118.3   22.8   266   11.3 
2026-10-14 00:00 UT   05 20 52.5   +23 26 41     1.605    2.266  119.3   22.6   266   11.3 
2026-10-15 00:00 UT   05 21 09.4   +23 22 55     1.595    2.267  120.2   22.4   266   11.3 
2026-10-16 00:00 UT   05 21 24.3   +23 19 04     1.585    2.267  121.1   22.1   266   11.3 
2026-10-17 00:00 UT   05 21 37.2   +23 15 08     1.575    2.268  122.1   21.9   266   11.3 
2026-10-18 00:00 UT   05 21 48.0   +23 11 07     1.566    2.268  123.0   21.6   266   11.2 
2026-10-19 00:00 UT   05 21 56.8   +23 07 01     1.556    2.269  124.0   21.3   266   11.2 
2026-10-20 00:00 UT   05 22 03.5   +23 02 50     1.546    2.269  125.0   21.1   266   11.2 
2026-10-21 00:00 UT   05 22 08.1   +22 58 34     1.537    2.270  125.9   20.8   266   11.2 
2026-10-22 00:00 UT   05 22 10.6   +22 54 13     1.528    2.270  126.9   20.5   266   11.1 
2026-10-23 00:00 UT   05 22 11.0   +22 49 47     1.519    2.270  127.9   20.2   267   11.1 
2026-10-24 00:00 UT   05 22 09.3   +22 45 16     1.510    2.271  128.9   19.9   267   11.1 

    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.