(129) Antigone
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	17 Jun 2025	11.1	2.431 AU	1.696 AU	21h23m	-10°16'	125.5°	19.9°
Opposition	5 Aug 2025	10.0	2.526 AU	1.512 AU	21h01m	-15°58'	179.0°	0.4°

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 Antigone are:

            e (Eccentricity)                : 0.2130847
            a (Semimajor axis)              : 2.8687790
            i (Inclination)                 : 12.26909
            Ω (Longitude of ascending node) : 135.65436
            ω (Argument of perihelion)      : 110.57265
            M (Mean anomaly)                : 27.02675
            Epoch                           : 2025 May 05

            L (Longitude of perihelion)     : 66.66631
            B (Latitude of perihelion)      : 11.47564
            P (Orbital period in years)     : 4.86            
        

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
2025-06-17 00:00 UT   21 23 40.7   -10 16 26     1.696    2.431  125.5   19.9   249   11.1 
2025-06-17 05:25 UT   21 23 42.2   -10 17 06     1.694    2.431  125.8   19.8   249   11.1 
2025-06-18 00:00 UT   21 23 46.6   -10 19 26     1.687    2.433  126.5   19.6   248   11.1 
2025-06-19 00:00 UT   21 23 50.8   -10 22 36     1.679    2.435  127.4   19.4   248   11.0 
2025-06-20 00:00 UT   21 23 53.5   -10 25 59     1.671    2.436  128.4   19.1   248   11.0 
2025-06-21 00:00 UT   21 23 54.5   -10 29 32     1.664    2.438  129.4   18.8   248   11.0 
2025-06-22 00:00 UT   21 23 54.0   -10 33 18     1.656    2.440  130.3   18.5   248   11.0 
2025-06-23 00:00 UT   21 23 51.8   -10 37 15     1.648    2.442  131.3   18.2   248   11.0 
2025-06-24 00:00 UT   21 23 48.0   -10 41 23     1.641    2.444  132.3   17.9   248   11.0 
2025-06-25 00:00 UT   21 23 42.6   -10 45 44     1.634    2.446  133.3   17.6   248   10.9 
2025-06-26 00:00 UT   21 23 35.6   -10 50 16     1.627    2.447  134.3   17.3   248   10.9 
2025-06-27 00:00 UT   21 23 26.9   -10 54 59     1.620    2.449  135.3   17.0   248   10.9 
2025-06-28 00:00 UT   21 23 16.8   -10 59 54     1.613    2.451  136.3   16.6   248   10.9 
2025-06-29 00:00 UT   21 23 05.0   -11 05 00     1.606    2.453  137.4   16.3   248   10.9 
2025-06-30 00:00 UT   21 22 51.6   -11 10 18     1.600    2.455  138.4   16.0   248   10.8 
2025-07-01 00:00 UT   21 22 36.8   -11 15 47     1.594    2.457  139.4   15.6   247   10.8 
2025-07-02 00:00 UT   21 22 20.4   -11 21 27     1.588    2.458  140.5   15.3   247   10.8 
2025-07-03 00:00 UT   21 22 02.4   -11 27 18     1.582    2.460  141.5   14.9   247   10.8 
2025-07-04 00:00 UT   21 21 43.0   -11 33 19     1.576    2.462  142.6   14.5   247   10.8 
2025-07-05 00:00 UT   21 21 22.1   -11 39 32     1.570    2.464  143.7   14.1   247   10.8 
2025-07-06 00:00 UT   21 20 59.8   -11 45 55     1.565    2.466  144.7   13.8   247   10.7 
2025-07-07 00:00 UT   21 20 36.0   -11 52 28     1.560    2.468  145.8   13.4   247   10.7 
2025-07-08 00:00 UT   21 20 10.8   -11 59 11     1.555    2.470  146.9   13.0   247   10.7 
2025-07-09 00:00 UT   21 19 44.3   -12 06 04     1.550    2.472  148.0   12.6   247   10.7 
2025-07-10 00:00 UT   21 19 16.3   -12 13 07     1.546    2.474  149.1   12.2   247   10.7 
2025-07-11 00:00 UT   21 18 47.1   -12 20 19     1.541    2.476  150.2   11.8   247   10.6 
2025-07-12 00:00 UT   21 18 16.6   -12 27 40     1.537    2.477  151.3   11.4   247   10.6 
2025-07-13 00:00 UT   21 17 44.7   -12 35 10     1.533    2.479  152.4   10.9   247   10.6 
2025-07-14 00:00 UT   21 17 11.7   -12 42 49     1.530    2.481  153.6   10.5   247   10.6 
2025-07-15 00:00 UT   21 16 37.5   -12 50 36     1.526    2.483  154.7   10.1   246   10.6 
2025-07-16 00:00 UT   21 16 02.1   -12 58 31     1.523    2.485  155.8    9.6   246   10.5 
2025-07-17 00:00 UT   21 15 25.5   -13 06 33     1.520    2.487  156.9    9.2   246   10.5 

    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.