(129) Antigone
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Opposition	5 Aug 2025	10.0	2.526 AU	1.512 AU	21h01m	-15°58'	179.0°	0.4°
Today	31 Aug 2025	10.9	2.579 AU	1.651 AU	20h44m	-19°23'	150.7°	11.0°

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 Antigone are:

            e (Eccentricity)                : 0.2130847
            a (Semimajor axis)              : 2.8687790
            i (Inclination)                 : 12.26909
            Ω (Longitude of ascending node) : 135.65437
            ω (Argument of perihelion)      : 110.57264
            M (Mean anomaly)                : 27.02675
            Epoch                           : 2025 May 05

            L (Longitude of perihelion)     : 66.66631
            B (Latitude of perihelion)      : 11.47565
            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
2025-08-31 00:00 UT   20 44 00.9   -19 23 32     1.651    2.579  150.7   11.0    73   10.9 
2025-08-31 02:12 UT   20 43 58.4   -19 24 07     1.652    2.579  150.6   11.1    73   10.9 
2025-09-01 00:00 UT   20 43 34.5   -19 29 53     1.660    2.581  149.6   11.4    73   10.9 
2025-09-02 00:00 UT   20 43 09.6   -19 36 06     1.668    2.583  148.5   11.8    73   10.9 
2025-09-03 00:00 UT   20 42 46.1   -19 42 08     1.678    2.585  147.4   12.1    73   10.9 
2025-09-04 00:00 UT   20 42 24.1   -19 48 02     1.687    2.588  146.4   12.5    73   11.0 
2025-09-05 00:00 UT   20 42 03.5   -19 53 45     1.696    2.590  145.3   12.8    73   11.0 
2025-09-06 00:00 UT   20 41 44.4   -19 59 19     1.706    2.592  144.2   13.1    73   11.0 
2025-09-07 00:00 UT   20 41 26.8   -20 04 43     1.716    2.594  143.2   13.5    73   11.0 
2025-09-08 00:00 UT   20 41 10.8   -20 09 58     1.726    2.596  142.1   13.8    73   11.1 
2025-09-09 00:00 UT   20 40 56.2   -20 15 03     1.737    2.598  141.1   14.1    73   11.1 
2025-09-10 00:00 UT   20 40 43.2   -20 19 58     1.747    2.600  140.0   14.4    73   11.1 
2025-09-11 00:00 UT   20 40 31.7   -20 24 44     1.758    2.603  139.0   14.7    73   11.1 
2025-09-12 00:00 UT   20 40 21.8   -20 29 20     1.769    2.605  137.9   15.0    73   11.2 
2025-09-13 00:00 UT   20 40 13.4   -20 33 46     1.780    2.607  136.9   15.3    73   11.2 
2025-09-14 00:00 UT   20 40 06.6   -20 38 03     1.791    2.609  135.9   15.6    73   11.2 
2025-09-15 00:00 UT   20 40 01.3   -20 42 10     1.802    2.611  134.9   15.8    73   11.2 
2025-09-16 00:00 UT   20 39 57.6   -20 46 07     1.814    2.613  133.9   16.1    73   11.3 
2025-09-17 00:00 UT   20 39 55.5   -20 49 55     1.826    2.615  132.9   16.4    73   11.3 
2025-09-18 00:00 UT   20 39 54.9   -20 53 33     1.837    2.618  131.9   16.6    73   11.3 
2025-09-19 00:00 UT   20 39 56.0   -20 57 02     1.849    2.620  130.9   16.8    73   11.3 
2025-09-20 00:00 UT   20 39 58.6   -21 00 21     1.862    2.622  129.9   17.1    73   11.4 
2025-09-21 00:00 UT   20 40 02.7   -21 03 31     1.874    2.624  128.9   17.3    73   11.4 
2025-09-22 00:00 UT   20 40 08.5   -21 06 31     1.887    2.626  128.0   17.5    73   11.4 
2025-09-23 00:00 UT   20 40 15.7   -21 09 22     1.899    2.628  127.0   17.8    73   11.4 
2025-09-24 00:00 UT   20 40 24.6   -21 12 04     1.912    2.631  126.1   18.0    73   11.5 
2025-09-25 00:00 UT   20 40 35.0   -21 14 36     1.925    2.633  125.1   18.2    73   11.5 
2025-09-26 00:00 UT   20 40 46.9   -21 16 59     1.938    2.635  124.2   18.4    73   11.5 
2025-09-27 00:00 UT   20 41 00.4   -21 19 14     1.951    2.637  123.2   18.5    73   11.5 
2025-09-28 00:00 UT   20 41 15.3   -21 21 19     1.964    2.639  122.3   18.7    73   11.6 
2025-09-29 00:00 UT   20 41 31.8   -21 23 15     1.978    2.642  121.4   18.9    73   11.6 
2025-09-30 00:00 UT   20 41 49.7   -21 25 03     1.991    2.644  120.4   19.1    73   11.6 

    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.