(225088) Gonggong
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Opposition	28 Aug 2026	21.3	89.842 AU	88.832 AU	22h30m	-10°08'	178.9°	0.0°
Today	22 Oct 2026	21.4	89.874 AU	89.272 AU	22h28m	-10°17'	126.9°	0.5°

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)                : 0.5042562
            a (Semimajor axis)              : 66.8664995
            i (Inclination)                 : 30.89914
            Ω (Longitude of ascending node) : 336.83831
            ω (Argument of perihelion)      : 206.62338
            M (Mean anomaly)                : 111.66375
            Epoch                           : 2026 Jun 09

            L (Longitude of perihelion)     : 0.11224
            B (Latitude of perihelion)      : -13.30439
            P (Orbital period in years)     : 546.78            
        

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
2026-10-22 00:00 UT   22 28 56.4   -10 17 46    89.272   89.874  126.9    0.5    68   21.4 
2026-10-22 06:53 UT   22 28 56.0   -10 17 48    89.277   89.874  126.6    0.5    68   21.4 
2026-10-23 00:00 UT   22 28 55.0   -10 17 52    89.287   89.874  125.9    0.5    68   21.4 
2026-10-24 00:00 UT   22 28 53.7   -10 17 57    89.302   89.875  124.9    0.5    68   21.4 
2026-10-25 00:00 UT   22 28 52.5   -10 18 02    89.317   89.876  123.9    0.5    68   21.4 
2026-10-26 00:00 UT   22 28 51.2   -10 18 07    89.332   89.876  122.9    0.5    68   21.4 
2026-10-27 00:00 UT   22 28 50.0   -10 18 12    89.347   89.877  121.9    0.5    68   21.4 
2026-10-28 00:00 UT   22 28 48.9   -10 18 17    89.363   89.877  120.9    0.5    68   21.4 
2026-10-29 00:00 UT   22 28 47.7   -10 18 21    89.378   89.878  119.9    0.5    68   21.4 
2026-10-30 00:00 UT   22 28 46.7   -10 18 25    89.394   89.878  118.9    0.6    68   21.4 
2026-10-31 00:00 UT   22 28 45.6   -10 18 29    89.410   89.879  117.9    0.6    68   21.4 
2026-11-01 00:00 UT   22 28 44.6   -10 18 33    89.426   89.880  116.9    0.6    68   21.4 
2026-11-02 00:00 UT   22 28 43.6   -10 18 36    89.442   89.880  115.9    0.6    68   21.4 
2026-11-03 00:00 UT   22 28 42.7   -10 18 39    89.459   89.881  114.9    0.6    68   21.4 
2026-11-04 00:00 UT   22 28 41.8   -10 18 42    89.475   89.881  113.9    0.6    68   21.4 
2026-11-05 00:00 UT   22 28 41.0   -10 18 45    89.492   89.882  112.9    0.6    68   21.4 
2026-11-06 00:00 UT   22 28 40.2   -10 18 47    89.508   89.882  111.9    0.6    68   21.4 
2026-11-07 00:00 UT   22 28 39.4   -10 18 50    89.525   89.883  110.8    0.6    68   21.4 
2026-11-08 00:00 UT   22 28 38.7   -10 18 52    89.542   89.884  109.8    0.6    68   21.4 
2026-11-09 00:00 UT   22 28 38.0   -10 18 53    89.559   89.884  108.8    0.6    68   21.5 
2026-11-10 00:00 UT   22 28 37.3   -10 18 55    89.576   89.885  107.8    0.6    68   21.5 
2026-11-11 00:00 UT   22 28 36.7   -10 18 56    89.594   89.885  106.8    0.6    68   21.5 
2026-11-12 00:00 UT   22 28 36.2   -10 18 57    89.611   89.886  105.8    0.6    68   21.5 
2026-11-13 00:00 UT   22 28 35.7   -10 18 58    89.628   89.887  104.8    0.6    68   21.5 
2026-11-14 00:00 UT   22 28 35.2   -10 18 58    89.646   89.887  103.8    0.6    68   21.5 
2026-11-15 00:00 UT   22 28 34.8   -10 18 59    89.663   89.888  102.8    0.6    68   21.5 
2026-11-16 00:00 UT   22 28 34.4   -10 18 59    89.681   89.888  101.8    0.6    68   21.5 
2026-11-17 00:00 UT   22 28 34.0   -10 18 59    89.698   89.889  100.8    0.6    68   21.5 
2026-11-18 00:00 UT   22 28 33.7   -10 18 58    89.716   89.889   99.8    0.6    68   21.5 
2026-11-19 00:00 UT   22 28 33.5   -10 18 57    89.734   89.890   98.8    0.6    68   21.5 
2026-11-20 00:00 UT   22 28 33.3   -10 18 56    89.752   89.891   97.7    0.6    68   21.5 
2026-11-21 00:00 UT   22 28 33.1   -10 18 55    89.770   89.891   96.7    0.6    68   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.