(225088) Gonggong
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	22 Mar 2026	21.4	89.750 AU	90.650 AU	22h31m	-10°08'	25.3°	0.3°
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
2026-03-22 00:00 UT   22 31 24.4   -10 08 39    90.650   89.750   25.3    0.3   247   21.4 
2026-03-22 00:47 UT   22 31 24.5   -10 08 38    90.650   89.750   25.3    0.3   247   21.4 
2026-03-23 00:00 UT   22 31 26.8   -10 08 24    90.643   89.751   26.2    0.3   247   21.4 
2026-03-24 00:00 UT   22 31 29.2   -10 08 08    90.636   89.751   27.2    0.3   247   21.4 
2026-03-25 00:00 UT   22 31 31.5   -10 07 53    90.629   89.752   28.2    0.3   247   21.4 
2026-03-26 00:00 UT   22 31 33.8   -10 07 38    90.622   89.753   29.2    0.3   247   21.4 
2026-03-27 00:00 UT   22 31 36.1   -10 07 23    90.614   89.753   30.2    0.3   247   21.4 
2026-03-28 00:00 UT   22 31 38.4   -10 07 09    90.606   89.754   31.1    0.3   247   21.4 
2026-03-29 00:00 UT   22 31 40.7   -10 06 54    90.598   89.754   32.1    0.3   247   21.4 
2026-03-30 00:00 UT   22 31 42.9   -10 06 39    90.589   89.755   33.1    0.3   247   21.5 
2026-03-31 00:00 UT   22 31 45.1   -10 06 25    90.581   89.755   34.1    0.4   247   21.5 
2026-04-01 00:00 UT   22 31 47.3   -10 06 11    90.572   89.756   35.1    0.4   247   21.5 
2026-04-02 00:00 UT   22 31 49.5   -10 05 57    90.562   89.757   36.0    0.4   247   21.5 
2026-04-03 00:00 UT   22 31 51.6   -10 05 43    90.553   89.757   37.0    0.4   247   21.5 
2026-04-04 00:00 UT   22 31 53.7   -10 05 29    90.543   89.758   38.0    0.4   247   21.5 
2026-04-05 00:00 UT   22 31 55.8   -10 05 16    90.534   89.758   39.0    0.4   247   21.5 
2026-04-06 00:00 UT   22 31 57.9   -10 05 02    90.523   89.759   39.9    0.4   247   21.5 
2026-04-07 00:00 UT   22 31 59.9   -10 04 49    90.513   89.759   40.9    0.4   247   21.5 
2026-04-08 00:00 UT   22 32 01.9   -10 04 36    90.503   89.760   41.9    0.4   247   21.5 
2026-04-09 00:00 UT   22 32 03.9   -10 04 23    90.492   89.761   42.9    0.4   248   21.5 
2026-04-10 00:00 UT   22 32 05.9   -10 04 10    90.481   89.761   43.8    0.4   248   21.5 
2026-04-11 00:00 UT   22 32 07.8   -10 03 57    90.470   89.762   44.8    0.5   248   21.5 
2026-04-12 00:00 UT   22 32 09.7   -10 03 45    90.458   89.762   45.8    0.5   248   21.5 
2026-04-13 00:00 UT   22 32 11.6   -10 03 33    90.447   89.763   46.8    0.5   248   21.5 
2026-04-14 00:00 UT   22 32 13.4   -10 03 21    90.435   89.764   47.7    0.5   248   21.5 
2026-04-15 00:00 UT   22 32 15.2   -10 03 09    90.423   89.764   48.7    0.5   248   21.5 
2026-04-16 00:00 UT   22 32 17.0   -10 02 57    90.411   89.765   49.7    0.5   248   21.5 
2026-04-17 00:00 UT   22 32 18.7   -10 02 46    90.398   89.765   50.6    0.5   248   21.5 
2026-04-18 00:00 UT   22 32 20.4   -10 02 34    90.386   89.766   51.6    0.5   248   21.5 
2026-04-19 00:00 UT   22 32 22.1   -10 02 23    90.373   89.766   52.6    0.5   248   21.5 
2026-04-20 00:00 UT   22 32 23.8   -10 02 12    90.360   89.767   53.5    0.5   248   21.5 
2026-04-21 00:00 UT   22 32 25.4   -10 02 02    90.347   89.768   54.5    0.5   248   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.