(129) Antigone
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	19 Apr 2025	11.8	2.339 AU	2.289 AU	20h37m	-11°34'	80.2°	25.0°
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
2025-04-19 00:00 UT   20 37 11.7   -11 34 07     2.289    2.339   80.2   25.0   256   11.8 
2025-04-19 04:57 UT   20 37 28.2   -11 33 18     2.287    2.339   80.4   25.0   256   11.8 
2025-04-20 00:00 UT   20 38 31.7   -11 30 12     2.279    2.340   80.9   25.1   256   11.8 
2025-04-21 00:00 UT   20 39 50.9   -11 26 19     2.268    2.341   81.5   25.1   256   11.8 
2025-04-22 00:00 UT   20 41 09.2   -11 22 28     2.258    2.343   82.2   25.2   256   11.8 
2025-04-23 00:00 UT   20 42 26.6   -11 18 40     2.247    2.344   82.8   25.2   256   11.8 
2025-04-24 00:00 UT   20 43 43.0   -11 14 55     2.236    2.345   83.5   25.2   256   11.8 
2025-04-25 00:00 UT   20 44 58.5   -11 11 12     2.226    2.347   84.1   25.2   255   11.8 
2025-04-26 00:00 UT   20 46 13.0   -11 07 33     2.215    2.348   84.8   25.3   255   11.8 
2025-04-27 00:00 UT   20 47 26.5   -11 03 56     2.205    2.350   85.4   25.3   255   11.7 
2025-04-28 00:00 UT   20 48 39.1   -11 00 23     2.194    2.351   86.1   25.3   255   11.7 
2025-04-29 00:00 UT   20 49 50.7   -10 56 54     2.184    2.352   86.8   25.3   255   11.7 
2025-04-30 00:00 UT   20 51 01.2   -10 53 28     2.173    2.354   87.4   25.3   255   11.7 
2025-05-01 00:00 UT   20 52 10.8   -10 50 06     2.162    2.355   88.1   25.3   254   11.7 
2025-05-02 00:00 UT   20 53 19.3   -10 46 49     2.152    2.357   88.8   25.3   254   11.7 
2025-05-03 00:00 UT   20 54 26.8   -10 43 35     2.141    2.358   89.5   25.3   254   11.7 
2025-05-04 00:00 UT   20 55 33.2   -10 40 26     2.130    2.359   90.2   25.3   254   11.7 
2025-05-05 00:00 UT   20 56 38.5   -10 37 21     2.120    2.361   90.9   25.3   254   11.7 
2025-05-06 00:00 UT   20 57 42.8   -10 34 21     2.109    2.362   91.5   25.3   254   11.7 
2025-05-07 00:00 UT   20 58 46.1   -10 31 26     2.098    2.364   92.2   25.2   253   11.6 
2025-05-08 00:00 UT   20 59 48.2   -10 28 36     2.088    2.365   93.0   25.2   253   11.6 
2025-05-09 00:00 UT   21 00 49.2   -10 25 50     2.077    2.367   93.7   25.2   253   11.6 
2025-05-10 00:00 UT   21 01 49.1   -10 23 11     2.067    2.368   94.4   25.2   253   11.6 
2025-05-11 00:00 UT   21 02 47.9   -10 20 37     2.056    2.370   95.1   25.1   253   11.6 
2025-05-12 00:00 UT   21 03 45.5   -10 18 08     2.046    2.371   95.8   25.1   253   11.6 
2025-05-13 00:00 UT   21 04 42.0   -10 15 45     2.035    2.373   96.5   25.0   253   11.6 
2025-05-14 00:00 UT   21 05 37.3   -10 13 29     2.025    2.374   97.3   25.0   252   11.6 
2025-05-15 00:00 UT   21 06 31.4   -10 11 18     2.014    2.376   98.0   24.9   252   11.6 
2025-05-16 00:00 UT   21 07 24.4   -10 09 14     2.004    2.378   98.8   24.9   252   11.5 
2025-05-17 00:00 UT   21 08 16.1   -10 07 16     1.993    2.379   99.5   24.8   252   11.5 
2025-05-18 00:00 UT   21 09 06.6   -10 05 25     1.983    2.381  100.2   24.7   252   11.5 
2025-05-19 00:00 UT   21 09 55.9   -10 03 41     1.972    2.382  101.0   24.6   252   11.5 

    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.