(225088) Gonggong
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Opposition	28 Aug 2025	21.3	89.631 AU	88.621 AU	22h29m	-10°24'	179.1°	0.0°
Today	31 Aug 2025	21.4	89.633 AU	88.624 AU	22h29m	-10°24'	177.6°	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)                : 0.5019951
            a (Semimajor axis)              : 66.9464643
            i (Inclination)                 : 30.82492
            Ω (Longitude of ascending node) : 336.84258
            ω (Argument of perihelion)      : 206.70820
            M (Mean anomaly)                : 111.02609
            Epoch                           : 2025 May 05

            L (Longitude of perihelion)     : 0.20952
            B (Latitude of perihelion)      : -13.31497
            P (Orbital period in years)     : 547.76            
        

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. A more printer-friendly version of the same chart can be found below.

Ephemerides:

Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2025-08-31 00:00 UT   22 29 52.8   -10 24 34    88.624   89.633  177.6    0.0    46   21.4 
2025-08-31 20:52 UT   22 29 50.7   -10 24 45    88.625   89.633  176.8    0.0    52   21.4 
2025-09-01 00:00 UT   22 29 50.4   -10 24 46    88.625   89.633  176.7    0.0    52   21.4 
2025-09-02 00:00 UT   22 29 48.0   -10 24 58    88.627   89.634  175.7    0.0    56   21.4 
2025-09-03 00:00 UT   22 29 45.7   -10 25 10    88.630   89.635  174.8    0.1    58   21.4 
2025-09-04 00:00 UT   22 29 43.3   -10 25 22    88.632   89.635  173.8    0.1    60   21.4 
2025-09-05 00:00 UT   22 29 41.0   -10 25 34    88.635   89.636  172.9    0.1    61   21.4 
2025-09-06 00:00 UT   22 29 38.6   -10 25 46    88.638   89.636  171.9    0.1    62   21.4 
2025-09-07 00:00 UT   22 29 36.3   -10 25 58    88.641   89.637  170.9    0.1    63   21.4 
2025-09-08 00:00 UT   22 29 33.9   -10 26 09    88.645   89.637  169.9    0.1    63   21.4 
2025-09-09 00:00 UT   22 29 31.6   -10 26 21    88.649   89.638  169.0    0.1    64   21.4 
2025-09-10 00:00 UT   22 29 29.3   -10 26 33    88.653   89.639  168.0    0.1    64   21.4 
2025-09-11 00:00 UT   22 29 27.0   -10 26 44    88.658   89.639  167.0    0.1    65   21.4 
2025-09-12 00:00 UT   22 29 24.7   -10 26 56    88.662   89.640  166.0    0.2    65   21.4 
2025-09-13 00:00 UT   22 29 22.4   -10 27 07    88.668   89.640  165.0    0.2    65   21.4 
2025-09-14 00:00 UT   22 29 20.1   -10 27 19    88.673   89.641  164.1    0.2    65   21.4 
2025-09-15 00:00 UT   22 29 17.9   -10 27 30    88.679   89.642  163.1    0.2    65   21.4 
2025-09-16 00:00 UT   22 29 15.6   -10 27 41    88.685   89.642  162.1    0.2    66   21.4 
2025-09-17 00:00 UT   22 29 13.4   -10 27 52    88.691   89.643  161.1    0.2    66   21.4 
2025-09-18 00:00 UT   22 29 11.1   -10 28 03    88.697   89.643  160.1    0.2    66   21.4 
2025-09-19 00:00 UT   22 29 08.9   -10 28 14    88.704   89.644  159.1    0.2    66   21.4 
2025-09-20 00:00 UT   22 29 06.7   -10 28 25    88.711   89.644  158.2    0.2    66   21.4 
2025-09-21 00:00 UT   22 29 04.5   -10 28 35    88.718   89.645  157.2    0.2    66   21.4 
2025-09-22 00:00 UT   22 29 02.4   -10 28 46    88.726   89.646  156.2    0.3    66   21.4 
2025-09-23 00:00 UT   22 29 00.2   -10 28 57    88.734   89.646  155.2    0.3    67   21.4 
2025-09-24 00:00 UT   22 28 58.1   -10 29 07    88.742   89.647  154.2    0.3    67   21.4 
2025-09-25 00:00 UT   22 28 56.0   -10 29 17    88.750   89.647  153.2    0.3    67   21.4 
2025-09-26 00:00 UT   22 28 53.9   -10 29 27    88.759   89.648  152.2    0.3    67   21.4 
2025-09-27 00:00 UT   22 28 51.8   -10 29 37    88.768   89.648  151.2    0.3    67   21.4 
2025-09-28 00:00 UT   22 28 49.7   -10 29 47    88.777   89.649  150.2    0.3    67   21.4 
2025-09-29 00:00 UT   22 28 47.7   -10 29 57    88.787   89.650  149.3    0.3    67   21.4 
2025-09-30 00:00 UT   22 28 45.7   -10 30 06    88.797   89.650  148.3    0.3    67   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.