(225088) Gonggong
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	19 Jun 2025	21.5	89.590 AU	89.208 AU	22h32m	-10°13'	111.7°	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
2025-06-19 00:00 UT   22 32 05.3   -10 13 22    89.208   89.590  111.7    0.6   249   21.5 
2025-06-19 07:46 UT   22 32 05.0   -10 13 23    89.203   89.590  112.1    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 
2025-06-29 00:00 UT   22 31 55.8   -10 14 06    89.062   89.595  121.3    0.6   249   21.5 
2025-06-30 00:00 UT   22 31 54.6   -10 14 12    89.049   89.596  122.3    0.5   249   21.5 
2025-07-01 00:00 UT   22 31 53.4   -10 14 18    89.035   89.597  123.2    0.5   249   21.5 
2025-07-02 00:00 UT   22 31 52.2   -10 14 24    89.021   89.597  124.2    0.5   249   21.5 
2025-07-03 00:00 UT   22 31 50.9   -10 14 30    89.008   89.598  125.2    0.5   249   21.5 
2025-07-04 00:00 UT   22 31 49.6   -10 14 36    88.995   89.598  126.1    0.5   249   21.5 
2025-07-05 00:00 UT   22 31 48.3   -10 14 43    88.982   89.599  127.1    0.5   249   21.5 
2025-07-06 00:00 UT   22 31 46.9   -10 14 50    88.969   89.599  128.0    0.5   249   21.4 
2025-07-07 00:00 UT   22 31 45.5   -10 14 57    88.957   89.600  129.0    0.5   249   21.4 
2025-07-08 00:00 UT   22 31 44.1   -10 15 04    88.944   89.601  130.0    0.5   249   21.4 
2025-07-09 00:00 UT   22 31 42.6   -10 15 11    88.932   89.601  130.9    0.5   249   21.4 
2025-07-10 00:00 UT   22 31 41.2   -10 15 19    88.920   89.602  131.9    0.5   249   21.4 
2025-07-11 00:00 UT   22 31 39.6   -10 15 26    88.908   89.602  132.8    0.5   249   21.4 
2025-07-12 00:00 UT   22 31 38.1   -10 15 34    88.896   89.603  133.8    0.5   249   21.4 
2025-07-13 00:00 UT   22 31 36.5   -10 15 42    88.885   89.604  134.8    0.5   249   21.4 
2025-07-14 00:00 UT   22 31 34.9   -10 15 51    88.873   89.604  135.7    0.5   249   21.4 
2025-07-15 00:00 UT   22 31 33.2   -10 15 59    88.862   89.605  136.7    0.4   249   21.4 
2025-07-16 00:00 UT   22 31 31.5   -10 16 08    88.851   89.605  137.6    0.4   249   21.4 
2025-07-17 00:00 UT   22 31 29.8   -10 16 16    88.841   89.606  138.6    0.4   249   21.4 
2025-07-18 00:00 UT   22 31 28.1   -10 16 25    88.830   89.606  139.6    0.4   249   21.4 
2025-07-19 00:00 UT   22 31 26.3   -10 16 34    88.820   89.607  140.5    0.4   250   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.