(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 Sep 2026	21.4	89.857 AU	88.933 AU	22h29m	-10°13'	156.7°	0.3°

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)                : 0.5042561
            a (Semimajor axis)              : 66.8664800
            i (Inclination)                 : 30.89914
            Ω (Longitude of ascending node) : 336.83831
            ω (Argument of perihelion)      : 206.62334
            M (Mean anomaly)                : 111.66385
            Epoch                           : 2026 Jun 09

            L (Longitude of perihelion)     : 0.11221
            B (Latitude of perihelion)      : -13.30437
            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
2026-09-22 00:00 UT   22 29 50.5   -10 13 33    88.933   89.857  156.7    0.3    67   21.4 
2026-09-22 07:17 UT   22 29 49.8   -10 13 36    88.936   89.857  156.4    0.3    67   21.4 
2026-09-23 00:00 UT   22 29 48.4   -10 13 43    88.941   89.857  155.7    0.3    67   21.4 
2026-09-24 00:00 UT   22 29 46.2   -10 13 54    88.949   89.858  154.7    0.3    67   21.4 
2026-09-25 00:00 UT   22 29 44.1   -10 14 04    88.957   89.858  153.8    0.3    67   21.4 
2026-09-26 00:00 UT   22 29 42.0   -10 14 14    88.966   89.859  152.8    0.3    67   21.4 
2026-09-27 00:00 UT   22 29 39.9   -10 14 24    88.975   89.859  151.8    0.3    67   21.4 
2026-09-28 00:00 UT   22 29 37.9   -10 14 34    88.984   89.860  150.8    0.3    67   21.4 
2026-09-29 00:00 UT   22 29 35.9   -10 14 44    88.993   89.861  149.8    0.3    67   21.4 
2026-09-30 00:00 UT   22 29 33.8   -10 14 54    89.003   89.861  148.8    0.3    67   21.4 
2026-10-01 00:00 UT   22 29 31.9   -10 15 03    89.012   89.862  147.8    0.3    67   21.4 
2026-10-02 00:00 UT   22 29 29.9   -10 15 13    89.022   89.862  146.8    0.3    67   21.4 
2026-10-03 00:00 UT   22 29 27.9   -10 15 22    89.033   89.863  145.8    0.4    67   21.4 
2026-10-04 00:00 UT   22 29 26.0   -10 15 31    89.043   89.863  144.8    0.4    67   21.4 
2026-10-05 00:00 UT   22 29 24.1   -10 15 40    89.054   89.864  143.8    0.4    67   21.4 
2026-10-06 00:00 UT   22 29 22.3   -10 15 49    89.065   89.865  142.9    0.4    68   21.4 
2026-10-07 00:00 UT   22 29 20.4   -10 15 58    89.077   89.865  141.9    0.4    68   21.4 
2026-10-08 00:00 UT   22 29 18.6   -10 16 06    89.088   89.866  140.9    0.4    68   21.4 
2026-10-09 00:00 UT   22 29 16.8   -10 16 14    89.100   89.866  139.9    0.4    68   21.4 
2026-10-10 00:00 UT   22 29 15.1   -10 16 23    89.112   89.867  138.9    0.4    68   21.4 
2026-10-11 00:00 UT   22 29 13.3   -10 16 31    89.124   89.868  137.9    0.4    68   21.4 
2026-10-12 00:00 UT   22 29 11.6   -10 16 38    89.137   89.868  136.9    0.4    68   21.4 
2026-10-13 00:00 UT   22 29 10.0   -10 16 46    89.149   89.869  135.9    0.4    68   21.4 
2026-10-14 00:00 UT   22 29 08.3   -10 16 53    89.162   89.869  134.9    0.5    68   21.4 
2026-10-15 00:00 UT   22 29 06.7   -10 17 01    89.175   89.870  133.9    0.5    68   21.4 
2026-10-16 00:00 UT   22 29 05.1   -10 17 08    89.188   89.870  132.9    0.5    68   21.4 
2026-10-17 00:00 UT   22 29 03.6   -10 17 15    89.202   89.871  131.9    0.5    68   21.4 
2026-10-18 00:00 UT   22 29 02.1   -10 17 21    89.216   89.872  130.9    0.5    68   21.4 
2026-10-19 00:00 UT   22 29 00.6   -10 17 28    89.230   89.872  129.9    0.5    68   21.4 
2026-10-20 00:00 UT   22 28 59.2   -10 17 34    89.244   89.873  128.9    0.5    68   21.4 
2026-10-21 00:00 UT   22 28 57.7   -10 17 40    89.258   89.873  127.9    0.5    68   21.4 
2026-10-22 00:00 UT   22 28 56.4   -10 17 46    89.272   89.874  126.9    0.5    68   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.