(225088) Gonggong
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	26 May 2026	21.5	89.788 AU	89.813 AU	22h32m	-09°58'	88.2°	0.6°
Opposition	28 Aug 2026	21.3	89.842 AU	88.832 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)                : 0.5031714
            a (Semimajor axis)              : 66.8933048
            i (Inclination)                 : 30.86634
            Ω (Longitude of ascending node) : 336.84009
            ω (Argument of perihelion)      : 206.64135
            M (Mean anomaly)                : 111.39046
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 0.13743
            B (Latitude of perihelion)      : -13.29990
            P (Orbital period in years)     : 547.11            
        

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
2026-05-26 00:00 UT   22 32 58.4   -09 58 07    89.813   89.788   88.2    0.6   248   21.5 
2026-05-26 09:01 UT   22 32 58.5   -09 58 06    89.807   89.788   88.6    0.6   248   21.5 
2026-05-27 00:00 UT   22 32 58.6   -09 58 04    89.797   89.788   89.2    0.6   248   21.5 
2026-05-28 00:00 UT   22 32 58.8   -09 58 02    89.780   89.789   90.2    0.6   248   21.5 
2026-05-29 00:00 UT   22 32 58.9   -09 58 00    89.764   89.790   91.1    0.6   248   21.5 
2026-05-30 00:00 UT   22 32 59.0   -09 57 59    89.747   89.790   92.1    0.6   248   21.5 
2026-05-31 00:00 UT   22 32 59.1   -09 57 57    89.731   89.791   93.0    0.6   248   21.5 
2026-06-01 00:00 UT   22 32 59.1   -09 57 56    89.715   89.791   94.0    0.6   248   21.5 
2026-06-02 00:00 UT   22 32 59.0   -09 57 55    89.698   89.792   94.9    0.6   248   21.5 
2026-06-03 00:00 UT   22 32 59.0   -09 57 54    89.682   89.792   95.9    0.6   248   21.5 
2026-06-04 00:00 UT   22 32 58.9   -09 57 54    89.666   89.793   96.9    0.6   248   21.5 
2026-06-05 00:00 UT   22 32 58.7   -09 57 53    89.650   89.794   97.8    0.6   248   21.5 
2026-06-06 00:00 UT   22 32 58.5   -09 57 53    89.633   89.794   98.8    0.6   248   21.5 
2026-06-07 00:00 UT   22 32 58.3   -09 57 54    89.617   89.795   99.7    0.6   248   21.5 
2026-06-08 00:00 UT   22 32 58.0   -09 57 54    89.601   89.795  100.7    0.6   248   21.5 
2026-06-09 00:00 UT   22 32 57.7   -09 57 55    89.585   89.796  101.6    0.6   248   21.5 
2026-06-10 00:00 UT   22 32 57.3   -09 57 56    89.569   89.796  102.6    0.6   248   21.5 
2026-06-11 00:00 UT   22 32 56.9   -09 57 57    89.553   89.797  103.6    0.6   249   21.5 
2026-06-12 00:00 UT   22 32 56.5   -09 57 58    89.537   89.798  104.5    0.6   249   21.5 
2026-06-13 00:00 UT   22 32 56.0   -09 57 60    89.521   89.798  105.5    0.6   249   21.5 
2026-06-14 00:00 UT   22 32 55.5   -09 58 02    89.506   89.799  106.4    0.6   249   21.5 
2026-06-15 00:00 UT   22 32 54.9   -09 58 04    89.490   89.799  107.4    0.6   249   21.5 
2026-06-16 00:00 UT   22 32 54.3   -09 58 06    89.475   89.800  108.4    0.6   249   21.5 
2026-06-17 00:00 UT   22 32 53.7   -09 58 09    89.459   89.801  109.3    0.6   249   21.5 
2026-06-18 00:00 UT   22 32 53.0   -09 58 12    89.444   89.801  110.3    0.6   249   21.5 
2026-06-19 00:00 UT   22 32 52.3   -09 58 15    89.428   89.802  111.2    0.6   249   21.5 
2026-06-20 00:00 UT   22 32 51.5   -09 58 18    89.413   89.802  112.2    0.6   249   21.5 
2026-06-21 00:00 UT   22 32 50.7   -09 58 21    89.398   89.803  113.1    0.6   249   21.5 
2026-06-22 00:00 UT   22 32 49.9   -09 58 25    89.383   89.803  114.1    0.6   249   21.5 
2026-06-23 00:00 UT   22 32 49.0   -09 58 29    89.368   89.804  115.1    0.6   249   21.5 
2026-06-24 00:00 UT   22 32 48.1   -09 58 33    89.354   89.805  116.0    0.6   249   21.5 
2026-06-25 00:00 UT   22 32 47.1   -09 58 38    89.339   89.805  117.0    0.6   249   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.