(225088) Gonggong
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	26 Jul 2026	21.4	89.823 AU	88.972 AU	22h32m	-10°02'	146.7°	0.4°
Opposition	28 Aug 2026	21.3	89.843 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)                : 0.5042570
            a (Semimajor axis)              : 66.8665678
            i (Inclination)                 : 30.89914
            Ω (Longitude of ascending node) : 336.83831
            ω (Argument of perihelion)      : 206.62352
            M (Mean anomaly)                : 111.66337
            Epoch                           : 2026 Jun 09

            L (Longitude of perihelion)     : 0.11237
            B (Latitude of perihelion)      : -13.30446
            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
2026-07-26 00:00 UT   22 32 00.9   -10 02 28    88.972   89.823  146.7    0.4   250   21.4 
2026-07-26 18:50 UT   22 31 59.4   -10 02 36    88.965   89.824  147.5    0.3   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 55.0   -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 09    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 30    88.925   89.827  152.5    0.3   250   21.4 
2026-08-02 00:00 UT   22 31 46.8   -10 03 40    88.918   89.827  153.5    0.3   250   21.4 
2026-08-03 00:00 UT   22 31 44.7   -10 03 51    88.911   89.828  154.5    0.3   250   21.4 
2026-08-04 00:00 UT   22 31 42.6   -10 04 02    88.904   89.828  155.4    0.3   250   21.4 
2026-08-05 00:00 UT   22 31 40.5   -10 04 13    88.898   89.829  156.4    0.3   250   21.4 
2026-08-06 00:00 UT   22 31 38.3   -10 04 24    88.892   89.830  157.4    0.2   250   21.4 
2026-08-07 00:00 UT   22 31 36.2   -10 04 35    88.887   89.830  158.3    0.2   250   21.4 
2026-08-08 00:00 UT   22 31 34.0   -10 04 46    88.881   89.831  159.3    0.2   250   21.4 
2026-08-09 00:00 UT   22 31 31.8   -10 04 58    88.876   89.831  160.3    0.2   250   21.4 
2026-08-10 00:00 UT   22 31 29.6   -10 05 09    88.871   89.832  161.2    0.2   251   21.4 
2026-08-11 00:00 UT   22 31 27.3   -10 05 21    88.867   89.832  162.2    0.2   251   21.4 
2026-08-12 00:00 UT   22 31 25.1   -10 05 32    88.862   89.833  163.2    0.2   251   21.4 
2026-08-13 00:00 UT   22 31 22.8   -10 05 44    88.858   89.834  164.1    0.2   251   21.4 
2026-08-14 00:00 UT   22 31 20.6   -10 05 56    88.854   89.834  165.1    0.2   251   21.4 
2026-08-15 00:00 UT   22 31 18.3   -10 06 07    88.851   89.835  166.1    0.2   251   21.4 
2026-08-16 00:00 UT   22 31 16.0   -10 06 19    88.848   89.835  167.0    0.1   252   21.4 
2026-08-17 00:00 UT   22 31 13.7   -10 06 31    88.845   89.836  168.0    0.1   252   21.4 
2026-08-18 00:00 UT   22 31 11.4   -10 06 43    88.842   89.836  169.0    0.1   252   21.4 
2026-08-19 00:00 UT   22 31 09.1   -10 06 55    88.840   89.837  169.9    0.1   253   21.4 
2026-08-20 00:00 UT   22 31 06.8   -10 07 07    88.838   89.838  170.9    0.1   253   21.4 
2026-08-21 00:00 UT   22 31 04.4   -10 07 19    88.836   89.838  171.9    0.1   254   21.4 
2026-08-22 00:00 UT   22 31 02.1   -10 07 31    88.835   89.839  172.9    0.1   254   21.4 
2026-08-23 00:00 UT   22 30 59.7   -10 07 43    88.834   89.839  173.8    0.1   255   21.3 
2026-08-24 00:00 UT   22 30 57.4   -10 07 55    88.833   89.840  174.8    0.1   257   21.3 
2026-08-25 00:00 UT   22 30 55.1   -10 08 07    88.832   89.841  175.7    0.0   259   21.3 

    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.