(230) Athamantis
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	4 Nov 2026	10.8	2.276 AU	1.421 AU	05h19m	+21°50'	140.6°	16.1°
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
2026-11-04 00:00 UT   05 19 30.7   +21 50 11     1.421    2.276  140.6   16.1   268   10.8 
2026-11-04 08:51 UT   05 19 21.0   +21 48 10     1.418    2.276  141.0   15.9   268   10.8 
2026-11-05 00:00 UT   05 19 03.7   +21 44 42     1.414    2.277  141.7   15.7   268   10.8 
2026-11-06 00:00 UT   05 18 34.6   +21 39 08     1.407    2.277  142.8   15.3   268   10.8 
2026-11-07 00:00 UT   05 18 03.4   +21 33 30     1.400    2.278  143.9   14.8   268   10.8 
2026-11-08 00:00 UT   05 17 30.3   +21 27 47     1.394    2.278  145.1   14.4   268   10.8 
2026-11-09 00:00 UT   05 16 55.2   +21 22 00     1.388    2.279  146.2   14.0   268   10.7 
2026-11-10 00:00 UT   05 16 18.2   +21 16 09     1.382    2.279  147.4   13.6   268   10.7 
2026-11-11 00:00 UT   05 15 39.4   +21 10 13     1.376    2.280  148.5   13.1   269   10.7 
2026-11-12 00:00 UT   05 14 58.7   +21 04 14     1.370    2.280  149.7   12.7   269   10.7 
2026-11-13 00:00 UT   05 14 16.2   +20 58 10     1.365    2.281  150.9   12.2   269   10.6 
2026-11-14 00:00 UT   05 13 32.0   +20 52 03     1.359    2.281  152.0   11.7   269   10.6 
2026-11-15 00:00 UT   05 12 46.1   +20 45 52     1.354    2.282  153.2   11.3   270   10.6 
2026-11-16 00:00 UT   05 11 58.6   +20 39 37     1.350    2.282  154.4   10.8   270   10.6 
2026-11-17 00:00 UT   05 11 09.5   +20 33 19     1.345    2.283  155.6   10.3   270   10.5 
2026-11-18 00:00 UT   05 10 18.9   +20 26 58     1.341    2.283  156.8    9.8   271   10.5 
2026-11-19 00:00 UT   05 09 26.9   +20 20 34     1.337    2.284  158.0    9.3   271   10.5 
2026-11-20 00:00 UT   05 08 33.6   +20 14 08     1.333    2.284  159.2    8.8   272   10.4 
2026-11-21 00:00 UT   05 07 38.9   +20 07 38     1.330    2.285  160.4    8.3   273   10.4 
2026-11-22 00:00 UT   05 06 43.1   +20 01 06     1.327    2.285  161.6    7.8   273   10.4 
2026-11-23 00:00 UT   05 05 46.1   +19 54 32     1.324    2.286  162.8    7.3   274   10.4 
2026-11-24 00:00 UT   05 04 48.0   +19 47 56     1.321    2.286  164.0    6.8   275   10.3 
2026-11-25 00:00 UT   05 03 49.0   +19 41 18     1.318    2.287  165.3    6.3   276   10.3 
2026-11-26 00:00 UT   05 02 49.0   +19 34 39     1.316    2.287  166.5    5.8   278   10.3 
2026-11-27 00:00 UT   05 01 48.2   +19 27 59     1.314    2.288  167.7    5.3   279   10.3 
2026-11-28 00:00 UT   05 00 46.7   +19 21 18     1.312    2.288  168.8    4.8   281   10.2 
2026-11-29 00:00 UT   04 59 44.5   +19 14 36     1.311    2.289  170.0    4.3   284   10.2 
2026-11-30 00:00 UT   04 58 41.7   +19 07 54     1.310    2.290  171.2    3.8   287   10.2 
2026-12-01 00:00 UT   04 57 38.5   +19 01 12     1.309    2.290  172.3    3.3   292   10.1 
2026-12-02 00:00 UT   04 56 34.8   +18 54 30     1.308    2.291  173.3    2.9   297   10.1 
2026-12-03 00:00 UT   04 55 30.9   +18 47 49     1.308    2.291  174.3    2.5   305   10.1 
2026-12-04 00:00 UT   04 54 26.7   +18 41 09     1.308    2.292  175.1    2.1   316   10.1 

    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.