(225088) Gonggong
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	2 Mar 2026	21.4	89.739 AU	90.725 AU	22h30m	-10°14'	5.6°	0.1°
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
2026-03-02 00:00 UT   22 30 34.0   -10 14 04    90.725   89.739    5.6    0.1   240   21.4 
2026-03-02 14:53 UT   22 30 35.7   -10 13 54    90.724   89.739    6.2    0.1   241   21.4 
2026-03-03 00:00 UT   22 30 36.7   -10 13 48    90.724   89.739    6.6    0.1   241   21.4 
2026-03-04 00:00 UT   22 30 39.2   -10 13 31    90.722   89.740    7.5    0.1   242   21.4 
2026-03-05 00:00 UT   22 30 41.8   -10 13 14    90.721   89.740    8.5    0.1   243   21.4 
2026-03-06 00:00 UT   22 30 44.4   -10 12 57    90.719   89.741    9.5    0.1   244   21.4 
2026-03-07 00:00 UT   22 30 47.0   -10 12 41    90.717   89.742   10.5    0.1   244   21.4 
2026-03-08 00:00 UT   22 30 49.6   -10 12 24    90.714   89.742   11.5    0.1   244   21.4 
2026-03-09 00:00 UT   22 30 52.1   -10 12 07    90.711   89.743   12.5    0.1   245   21.4 
2026-03-10 00:00 UT   22 30 54.7   -10 11 51    90.708   89.743   13.5    0.1   245   21.4 
2026-03-11 00:00 UT   22 30 57.2   -10 11 34    90.705   89.744   14.4    0.2   245   21.4 
2026-03-12 00:00 UT   22 30 59.8   -10 11 18    90.701   89.744   15.4    0.2   245   21.4 
2026-03-13 00:00 UT   22 31 02.3   -10 11 02    90.698   89.745   16.4    0.2   246   21.4 
2026-03-14 00:00 UT   22 31 04.8   -10 10 46    90.693   89.746   17.4    0.2   246   21.4 
2026-03-15 00:00 UT   22 31 07.3   -10 10 29    90.689   89.746   18.4    0.2   246   21.4 
2026-03-16 00:00 UT   22 31 09.8   -10 10 13    90.684   89.747   19.4    0.2   246   21.4 
2026-03-17 00:00 UT   22 31 12.3   -10 09 57    90.679   89.747   20.4    0.2   246   21.4 
2026-03-18 00:00 UT   22 31 14.8   -10 09 41    90.674   89.748   21.3    0.2   246   21.4 
2026-03-19 00:00 UT   22 31 17.2   -10 09 26    90.668   89.748   22.3    0.2   246   21.4 
2026-03-20 00:00 UT   22 31 19.6   -10 09 10    90.662   89.749   23.3    0.3   247   21.4 
2026-03-21 00:00 UT   22 31 22.0   -10 08 54    90.656   89.750   24.3    0.3   247   21.4 
2026-03-22 00:00 UT   22 31 24.4   -10 08 39    90.650   89.750   25.3    0.3   247   21.4 
2026-03-23 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 

    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.