(225088) Gonggong
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	15 Nov 2025	21.5	89.677 AU	89.462 AU	22h27m	-10°34'	102.3°	0.6°
Opposition	28 Aug 2026	21.4	89.843 AU	88.833 AU	22h30m	-10°08'	178.9°	0.0°

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 Gonggong are:

            e (Eccentricity)                : 0.5031767
            a (Semimajor axis)              : 66.8950294
            i (Inclination)                 : 30.86640
            Ω (Longitude of ascending node) : 336.84008
            ω (Argument of perihelion)      : 206.64413
            M (Mean anomaly)                : 111.38406
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 0.13993
            B (Latitude of perihelion)      : -13.30123
            P (Orbital period in years)     : 547.13            
        

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
2025-11-15 00:00 UT   22 27 47.2   -10 34 02    89.462   89.677  102.3    0.6    68   21.5 
2025-11-15 05:03 UT   22 27 47.2   -10 34 02    89.465   89.677  102.0    0.6    68   21.5 
2025-11-16 00:00 UT   22 27 46.9   -10 34 01    89.479   89.678  101.3    0.6    68   21.5 
2025-11-17 00:00 UT   22 27 46.5   -10 34 01    89.497   89.678  100.2    0.6    68   21.5 
2025-11-18 00:00 UT   22 27 46.3   -10 34 00    89.515   89.679   99.2    0.6    68   21.5 
2025-11-19 00:00 UT   22 27 46.0   -10 33 59    89.532   89.679   98.2    0.6    68   21.5 
2025-11-20 00:00 UT   22 27 45.8   -10 33 58    89.550   89.680   97.2    0.6    68   21.5 
2025-11-21 00:00 UT   22 27 45.7   -10 33 56    89.568   89.681   96.2    0.6    68   21.5 
2025-11-22 00:00 UT   22 27 45.6   -10 33 55    89.586   89.681   95.2    0.6    68   21.5 
2025-11-23 00:00 UT   22 27 45.5   -10 33 53    89.604   89.682   94.2    0.6    68   21.5 
2025-11-24 00:00 UT   22 27 45.5   -10 33 50    89.622   89.682   93.2    0.6    68   21.5 
2025-11-25 00:00 UT   22 27 45.5   -10 33 48    89.640   89.683   92.2    0.6    69   21.5 
2025-11-26 00:00 UT   22 27 45.6   -10 33 45    89.658   89.683   91.2    0.6    69   21.5 
2025-11-27 00:00 UT   22 27 45.7   -10 33 42    89.676   89.684   90.1    0.6    69   21.5 
2025-11-28 00:00 UT   22 27 45.9   -10 33 39    89.694   89.685   89.1    0.6    69   21.5 
2025-11-29 00:00 UT   22 27 46.1   -10 33 35    89.712   89.685   88.1    0.6    69   21.5 
2025-11-30 00:00 UT   22 27 46.3   -10 33 31    89.730   89.686   87.1    0.6    69   21.5 
2025-12-01 00:00 UT   22 27 46.6   -10 33 27    89.748   89.686   86.1    0.6    69   21.5 
2025-12-02 00:00 UT   22 27 46.9   -10 33 23    89.766   89.687   85.1    0.6    69   21.5 
2025-12-03 00:00 UT   22 27 47.3   -10 33 19    89.784   89.688   84.1    0.6    69   21.5 
2025-12-04 00:00 UT   22 27 47.7   -10 33 14    89.802   89.688   83.1    0.6    69   21.5 
2025-12-05 00:00 UT   22 27 48.2   -10 33 09    89.819   89.689   82.0    0.6    69   21.5 
2025-12-06 00:00 UT   22 27 48.7   -10 33 03    89.837   89.689   81.0    0.6    69   21.5 
2025-12-07 00:00 UT   22 27 49.2   -10 32 58    89.855   89.690   80.0    0.6    69   21.5 
2025-12-08 00:00 UT   22 27 49.8   -10 32 52    89.873   89.690   79.0    0.6    69   21.5 
2025-12-09 00:00 UT   22 27 50.5   -10 32 46    89.890   89.691   78.0    0.6    69   21.5 
2025-12-10 00:00 UT   22 27 51.2   -10 32 40    89.908   89.692   77.0    0.6    69   21.5 
2025-12-11 00:00 UT   22 27 51.9   -10 32 33    89.925   89.692   76.0    0.6    69   21.5 
2025-12-12 00:00 UT   22 27 52.6   -10 32 27    89.943   89.693   75.0    0.6    69   21.5 
2025-12-13 00:00 UT   22 27 53.5   -10 32 20    89.960   89.693   74.0    0.6    69   21.5 
2025-12-14 00:00 UT   22 27 54.3   -10 32 12    89.978   89.694   72.9    0.6    69   21.5 
2025-12-15 00:00 UT   22 27 55.2   -10 32 05    89.995   89.695   71.9    0.6    69   21.5 

    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.