(225088) Gonggong
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	3 Jul 2025	21.5	89.598 AU	89.008 AU	22h31m	-10°14'	125.2°	0.5°
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
2025-07-03 00:00 UT   22 31 50.9   -10 14 30    89.008   89.598  125.2    0.5   249   21.5 
2025-07-03 07:50 UT   22 31 50.5   -10 14 32    89.004   89.598  125.5    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 
2025-07-20 00:00 UT   22 31 24.5   -10 16 43    88.810   89.608  141.5    0.4   250   21.4 
2025-07-21 00:00 UT   22 31 22.7   -10 16 53    88.800   89.608  142.4    0.4   250   21.4 
2025-07-22 00:00 UT   22 31 20.9   -10 17 02    88.791   89.609  143.4    0.4   250   21.4 
2025-07-23 00:00 UT   22 31 19.0   -10 17 12    88.781   89.609  144.4    0.4   250   21.4 
2025-07-24 00:00 UT   22 31 17.1   -10 17 21    88.772   89.610  145.3    0.4   250   21.4 
2025-07-25 00:00 UT   22 31 15.2   -10 17 31    88.763   89.611  146.3    0.4   250   21.4 
2025-07-26 00:00 UT   22 31 13.2   -10 17 41    88.755   89.611  147.3    0.4   250   21.4 
2025-07-27 00:00 UT   22 31 11.3   -10 17 51    88.746   89.612  148.2    0.3   250   21.4 
2025-07-28 00:00 UT   22 31 09.3   -10 18 02    88.738   89.612  149.2    0.3   250   21.4 
2025-07-29 00:00 UT   22 31 07.3   -10 18 12    88.730   89.613  150.2    0.3   250   21.4 
2025-07-30 00:00 UT   22 31 05.2   -10 18 22    88.723   89.613  151.1    0.3   250   21.4 
2025-07-31 00:00 UT   22 31 03.2   -10 18 33    88.716   89.614  152.1    0.3   250   21.4 
2025-08-01 00:00 UT   22 31 01.1   -10 18 44    88.708   89.615  153.0    0.3   250   21.4 
2025-08-02 00:00 UT   22 30 59.0   -10 18 55    88.702   89.615  154.0    0.3   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.