(225088) Gonggong
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	12 Jan 2026	21.5	89.711 AU	90.420 AU	22h28m	-10°27'	43.6°	0.4°
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
2026-01-12 00:00 UT   22 28 35.9   -10 27 06    90.420   89.711   43.6    0.4    69   21.5 
2026-01-12 06:38 UT   22 28 36.4   -10 27 02    90.424   89.711   43.3    0.4    69   21.5 
2026-01-13 00:00 UT   22 28 37.8   -10 26 52    90.433   89.711   42.6    0.4    69   21.5 
2026-01-14 00:00 UT   22 28 39.8   -10 26 39    90.445   89.712   41.6    0.4    69   21.5 
2026-01-15 00:00 UT   22 28 41.8   -10 26 25    90.457   89.713   40.6    0.4    69   21.5 
2026-01-16 00:00 UT   22 28 43.9   -10 26 11    90.469   89.713   39.6    0.4    70   21.5 
2026-01-17 00:00 UT   22 28 45.9   -10 25 57    90.481   89.714   38.5    0.4    70   21.5 
2026-01-18 00:00 UT   22 28 48.0   -10 25 43    90.492   89.714   37.5    0.4    70   21.5 
2026-01-19 00:00 UT   22 28 50.1   -10 25 28    90.503   89.715   36.5    0.4    70   21.5 
2026-01-20 00:00 UT   22 28 52.3   -10 25 14    90.514   89.715   35.5    0.4    70   21.5 
2026-01-21 00:00 UT   22 28 54.5   -10 24 59    90.525   89.716   34.5    0.4    70   21.5 
2026-01-22 00:00 UT   22 28 56.6   -10 24 44    90.535   89.717   33.5    0.3    70   21.5 
2026-01-23 00:00 UT   22 28 58.9   -10 24 29    90.545   89.717   32.5    0.3    70   21.5 
2026-01-24 00:00 UT   22 29 01.1   -10 24 14    90.555   89.718   31.5    0.3    70   21.5 
2026-01-25 00:00 UT   22 29 03.4   -10 23 59    90.565   89.718   30.5    0.3    70   21.5 
2026-01-26 00:00 UT   22 29 05.7   -10 23 44    90.574   89.719   29.5    0.3    70   21.5 
2026-01-27 00:00 UT   22 29 08.0   -10 23 28    90.584   89.719   28.5    0.3    70   21.5 
2026-01-28 00:00 UT   22 29 10.3   -10 23 13    90.592   89.720   27.5    0.3    70   21.5 
2026-01-29 00:00 UT   22 29 12.6   -10 22 57    90.601   89.721   26.5    0.3    70   21.5 
2026-01-30 00:00 UT   22 29 15.0   -10 22 41    90.609   89.721   25.5    0.3    70   21.5 
2026-01-31 00:00 UT   22 29 17.4   -10 22 25    90.617   89.722   24.5    0.3    70   21.5 
2026-02-01 00:00 UT   22 29 19.8   -10 22 10    90.625   89.722   23.5    0.3    70   21.5 
2026-02-02 00:00 UT   22 29 22.2   -10 21 54    90.633   89.723   22.4    0.2    70   21.5 
2026-02-03 00:00 UT   22 29 24.7   -10 21 37    90.640   89.724   21.4    0.2    71   21.5 
2026-02-04 00:00 UT   22 29 27.1   -10 21 21    90.647   89.724   20.4    0.2    71   21.5 
2026-02-05 00:00 UT   22 29 29.6   -10 21 05    90.653   89.725   19.4    0.2    71   21.4 
2026-02-06 00:00 UT   22 29 32.1   -10 20 49    90.660   89.725   18.4    0.2    71   21.4 
2026-02-07 00:00 UT   22 29 34.6   -10 20 32    90.666   89.726   17.4    0.2    71   21.4 
2026-02-08 00:00 UT   22 29 37.1   -10 20 16    90.672   89.726   16.4    0.2    71   21.4 
2026-02-09 00:00 UT   22 29 39.6   -10 19 59    90.677   89.727   15.4    0.2    71   21.4 
2026-02-10 00:00 UT   22 29 42.1   -10 19 42    90.683   89.728   14.4    0.2    72   21.4 
2026-02-11 00:00 UT   22 29 44.7   -10 19 26    90.687   89.728   13.4    0.1    72   21.4 

    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.