(230) Athamantis
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	31 Jan 2023	12.2	2.261 AU	2.214 AU	01h52m	+12°15'	80.0°	25.4°
Opposition	2 Mar 2024	10.9	2.497 AU	1.527 AU	10h33m	-07°19'	164.8°	6.0°

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)                : 0.0617830
            a (Semimajor axis)              : 2.3820133
            i (Inclination)                 : 9.45478
            Ω (Longitude of ascending node) : 239.77353
            ω (Argument of perihelion)      : 139.02162
            M (Mean anomaly)                : 39.62928
            Epoch                           : 2023 Feb 25

            L (Longitude of perihelion)     : 199.18275
            B (Latitude of perihelion)      : 6.18410
            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
2023-01-31 00:00 UT   01 52 31.5   +12 15 37     2.214    2.261   80.0   25.4    69   12.2 
2023-01-31 23:50 UT   01 53 56.5   +12 19 60     2.227    2.262   79.3   25.3    69   12.2 
2023-02-01 00:00 UT   01 53 57.1   +12 20 02     2.227    2.262   79.3   25.3    69   12.2 
2023-02-02 00:00 UT   01 55 23.3   +12 24 31     2.240    2.262   78.6   25.3    70   12.2 
2023-02-03 00:00 UT   01 56 50.2   +12 29 04     2.252    2.263   78.0   25.2    70   12.2 
2023-02-04 00:00 UT   01 58 17.9   +12 33 41     2.265    2.263   77.3   25.1    70   12.3 
2023-02-05 00:00 UT   01 59 46.1   +12 38 22     2.277    2.264   76.7   25.1    70   12.3 
2023-02-06 00:00 UT   02 01 15.1   +12 43 06     2.290    2.264   76.0   25.0    70   12.3 
2023-02-07 00:00 UT   02 02 44.6   +12 47 54     2.302    2.264   75.4   24.9    70   12.3 
2023-02-08 00:00 UT   02 04 14.8   +12 52 45     2.315    2.265   74.8   24.8    70   12.3 
2023-02-09 00:00 UT   02 05 45.6   +12 57 39     2.327    2.265   74.1   24.8    70   12.3 
2023-02-10 00:00 UT   02 07 17.1   +13 02 35     2.339    2.266   73.5   24.7    70   12.3 
2023-02-11 00:00 UT   02 08 49.1   +13 07 35     2.352    2.266   72.8   24.6    70   12.3 
2023-02-12 00:00 UT   02 10 21.8   +13 12 38     2.364    2.267   72.2   24.5    70   12.3 
2023-02-13 00:00 UT   02 11 55.0   +13 17 42     2.376    2.267   71.6   24.4    71   12.3 
2023-02-14 00:00 UT   02 13 28.8   +13 22 50     2.388    2.267   71.0   24.3    71   12.4 
2023-02-15 00:00 UT   02 15 03.2   +13 27 59     2.401    2.268   70.3   24.2    71   12.4 
2023-02-16 00:00 UT   02 16 38.2   +13 33 11     2.413    2.268   69.7   24.1    71   12.4 
2023-02-17 00:00 UT   02 18 13.7   +13 38 24     2.425    2.269   69.1   24.0    71   12.4 
2023-02-18 00:00 UT   02 19 49.8   +13 43 40     2.437    2.269   68.5   23.9    71   12.4 
2023-02-19 00:00 UT   02 21 26.5   +13 48 57     2.449    2.270   67.9   23.8    71   12.4 
2023-02-20 00:00 UT   02 23 03.7   +13 54 16     2.461    2.270   67.3   23.7    71   12.4 
2023-02-21 00:00 UT   02 24 41.4   +13 59 36     2.473    2.271   66.7   23.6    71   12.4 
2023-02-22 00:00 UT   02 26 19.7   +14 04 57     2.485    2.271   66.1   23.5    72   12.4 

    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.