(225088) Gonggong
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	4 Jul 2026	21.4	89.810 AU	89.214 AU	22h32m	-09°59'	125.6°	0.5°
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
2026-07-04 00:00 UT   22 32 37.0   -09 59 26    89.214   89.810  125.6    0.5   249   21.4 
2026-07-04 01:57 UT   22 32 36.8   -09 59 27    89.213   89.810  125.7    0.5   249   21.4 
2026-07-05 00:00 UT   22 32 35.6   -09 59 33    89.201   89.811  126.6    0.5   249   21.4 
2026-07-06 00:00 UT   22 32 34.3   -09 59 39    89.188   89.811  127.5    0.5   249   21.4 
2026-07-07 00:00 UT   22 32 32.9   -09 59 46    89.176   89.812  128.5    0.5   249   21.4 
2026-07-08 00:00 UT   22 32 31.5   -09 59 53    89.163   89.813  129.4    0.5   249   21.4 
2026-07-09 00:00 UT   22 32 30.1   -10 00 00    89.151   89.813  130.4    0.5   249   21.4 
2026-07-10 00:00 UT   22 32 28.6   -10 00 08    89.139   89.814  131.4    0.5   249   21.4 
2026-07-11 00:00 UT   22 32 27.1   -10 00 15    89.127   89.814  132.3    0.5   249   21.4 
2026-07-12 00:00 UT   22 32 25.5   -10 00 23    89.115   89.815  133.3    0.5   249   21.4 
2026-07-13 00:00 UT   22 32 24.0   -10 00 31    89.103   89.816  134.2    0.5   249   21.4 
2026-07-14 00:00 UT   22 32 22.4   -10 00 39    89.092   89.816  135.2    0.5   249   21.4 
2026-07-15 00:00 UT   22 32 20.7   -10 00 47    89.080   89.817  136.2    0.4   249   21.4 
2026-07-16 00:00 UT   22 32 19.1   -10 00 55    89.069   89.817  137.1    0.4   249   21.4 
2026-07-17 00:00 UT   22 32 17.4   -10 01 04    89.059   89.818  138.1    0.4   249   21.4 
2026-07-18 00:00 UT   22 32 15.7   -10 01 13    89.048   89.818  139.0    0.4   249   21.4 
2026-07-19 00:00 UT   22 32 13.9   -10 01 22    89.038   89.819  140.0    0.4   249   21.4 
2026-07-20 00:00 UT   22 32 12.2   -10 01 31    89.028   89.820  141.0    0.4   249   21.4 
2026-07-21 00:00 UT   22 32 10.4   -10 01 40    89.018   89.820  141.9    0.4   249   21.4 
2026-07-22 00:00 UT   22 32 08.5   -10 01 49    89.008   89.821  142.9    0.4   249   21.4 
2026-07-23 00:00 UT   22 32 06.7   -10 01 59    88.999   89.821  143.9    0.4   249   21.4 
2026-07-24 00:00 UT   22 32 04.8   -10 02 08    88.989   89.822  144.8    0.4   249   21.4 
2026-07-25 00:00 UT   22 32 02.9   -10 02 18    88.980   89.822  145.8    0.4   249   21.4 
2026-07-26 00:00 UT   22 32 01.0   -10 02 28    88.972   89.823  146.7    0.4   250   21.4 
2026-07-27 00:00 UT   22 31 59.0   -10 02 38    88.963   89.824  147.7    0.3   250   21.4 
2026-07-28 00:00 UT   22 31 57.0   -10 02 48    88.955   89.824  148.7    0.3   250   21.4 
2026-07-29 00:00 UT   22 31 55.1   -10 02 58    88.947   89.825  149.6    0.3   250   21.4 
2026-07-30 00:00 UT   22 31 53.0   -10 03 08    88.939   89.825  150.6    0.3   250   21.4 
2026-07-31 00:00 UT   22 31 51.0   -10 03 19    88.932   89.826  151.6    0.3   250   21.4 
2026-08-01 00:00 UT   22 31 48.9   -10 03 29    88.924   89.826  152.5    0.3   250   21.4 
2026-08-02 00:00 UT   22 31 46.9   -10 03 40    88.917   89.827  153.5    0.3   250   21.4 
2026-08-03 00:00 UT   22 31 44.8   -10 03 51    88.911   89.828  154.5    0.3   250   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.