(225088) Gonggong
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	29 May 2025	21.5	89.577 AU	89.542 AU	22h32m	-10°13'	91.6°	0.6°
Opposition	28 Aug 2025	21.3	89.631 AU	88.620 AU	22h29m	-10°24'	179.1°	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)                : 0.5019870
            a (Semimajor axis)              : 66.9442668
            i (Inclination)                 : 30.82486
            Ω (Longitude of ascending node) : 336.84258
            ω (Argument of perihelion)      : 206.70459
            M (Mean anomaly)                : 111.03450
            Epoch                           : 2025 May 05

            L (Longitude of perihelion)     : 0.20626
            B (Latitude of perihelion)      : -13.31324
            P (Orbital period in years)     : 547.73            
        

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
2025-05-29 00:00 UT   22 32 12.3   -10 13 03    89.542   89.577   91.6    0.6   248   21.5 
2025-05-29 09:05 UT   22 32 12.3   -10 13 02    89.536   89.578   92.0    0.6   248   21.5 
2025-05-30 00:00 UT   22 32 12.4   -10 13 01    89.526   89.578   92.6    0.6   248   21.5 
2025-05-31 00:00 UT   22 32 12.4   -10 12 60    89.510   89.578   93.5    0.6   248   21.5 
2025-06-01 00:00 UT   22 32 12.4   -10 12 59    89.493   89.579   94.5    0.6   248   21.5 
2025-06-02 00:00 UT   22 32 12.4   -10 12 58    89.477   89.580   95.5    0.6   248   21.5 
2025-06-03 00:00 UT   22 32 12.3   -10 12 58    89.461   89.580   96.4    0.6   248   21.5 
2025-06-04 00:00 UT   22 32 12.1   -10 12 57    89.445   89.581   97.4    0.6   248   21.5 
2025-06-05 00:00 UT   22 32 12.0   -10 12 57    89.428   89.581   98.3    0.6   248   21.5 
2025-06-06 00:00 UT   22 32 11.8   -10 12 58    89.412   89.582   99.3    0.6   249   21.5 
2025-06-07 00:00 UT   22 32 11.5   -10 12 58    89.396   89.583  100.3    0.6   249   21.5 
2025-06-08 00:00 UT   22 32 11.2   -10 12 59    89.380   89.583  101.2    0.6   249   21.5 
2025-06-09 00:00 UT   22 32 10.9   -10 12 60    89.364   89.584  102.2    0.6   249   21.5 
2025-06-10 00:00 UT   22 32 10.5   -10 13 01    89.348   89.584  103.1    0.6   249   21.5 
2025-06-11 00:00 UT   22 32 10.1   -10 13 02    89.332   89.585  104.1    0.6   249   21.5 
2025-06-12 00:00 UT   22 32 09.6   -10 13 04    89.316   89.585  105.0    0.6   249   21.5 
2025-06-13 00:00 UT   22 32 09.1   -10 13 06    89.301   89.586  106.0    0.6   249   21.5 
2025-06-14 00:00 UT   22 32 08.6   -10 13 08    89.285   89.587  107.0    0.6   249   21.5 
2025-06-15 00:00 UT   22 32 08.0   -10 13 10    89.269   89.587  107.9    0.6   249   21.5 
2025-06-16 00:00 UT   22 32 07.4   -10 13 13    89.254   89.588  108.9    0.6   249   21.5 
2025-06-17 00:00 UT   22 32 06.7   -10 13 16    89.238   89.588  109.8    0.6   249   21.5 
2025-06-18 00:00 UT   22 32 06.0   -10 13 19    89.223   89.589  110.8    0.6   249   21.5 
2025-06-19 00:00 UT   22 32 05.3   -10 13 22    89.208   89.590  111.7    0.6   249   21.5 
2025-06-20 00:00 UT   22 32 04.5   -10 13 25    89.193   89.590  112.7    0.6   249   21.5 
2025-06-21 00:00 UT   22 32 03.7   -10 13 29    89.178   89.591  113.7    0.6   249   21.5 
2025-06-22 00:00 UT   22 32 02.8   -10 13 33    89.163   89.591  114.6    0.6   249   21.5 
2025-06-23 00:00 UT   22 32 01.9   -10 13 37    89.148   89.592  115.6    0.6   249   21.5 
2025-06-24 00:00 UT   22 32 01.0   -10 13 41    89.134   89.592  116.5    0.6   249   21.5 
2025-06-25 00:00 UT   22 32 00.0   -10 13 46    89.119   89.593  117.5    0.6   249   21.5 
2025-06-26 00:00 UT   22 31 59.0   -10 13 51    89.105   89.594  118.5    0.6   249   21.5 
2025-06-27 00:00 UT   22 31 58.0   -10 13 56    89.090   89.594  119.4    0.6   249   21.5 
2025-06-28 00:00 UT   22 31 56.9   -10 14 01    89.076   89.595  120.4    0.6   249   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.