(225088) Gonggong
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	31 Jul 2025	21.4	89.615 AU	88.716 AU	22h31m	-10°18'	152.1°	0.3°
Opposition	28 Aug 2025	21.3	89.631 AU	88.621 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)                : 0.5019951
            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
2025-07-31 00:00 UT   22 31 03.2   -10 18 33    88.716   89.615  152.1    0.3   250   21.4 
2025-07-31 08:00 UT   22 31 02.5   -10 18 36    88.714   89.615  152.4    0.3   250   21.4 
2025-08-01 00:00 UT   22 31 01.1   -10 18 44    88.709   89.615  153.0    0.3   250   21.4 
2025-08-02 00:00 UT   22 30 59.0   -10 18 54    88.702   89.616  154.0    0.3   250   21.4 
2025-08-03 00:00 UT   22 30 56.9   -10 19 05    88.696   89.616  155.0    0.3   250   21.4 
2025-08-04 00:00 UT   22 30 54.8   -10 19 16    88.689   89.617  155.9    0.3   250   21.4 
2025-08-05 00:00 UT   22 30 52.6   -10 19 27    88.683   89.618  156.9    0.3   251   21.4 
2025-08-06 00:00 UT   22 30 50.5   -10 19 39    88.678   89.618  157.9    0.2   251   21.4 
2025-08-07 00:00 UT   22 30 48.3   -10 19 50    88.672   89.619  158.8    0.2   251   21.4 
2025-08-08 00:00 UT   22 30 46.1   -10 20 01    88.667   89.619  159.8    0.2   251   21.4 
2025-08-09 00:00 UT   22 30 43.9   -10 20 12    88.662   89.620  160.8    0.2   251   21.4 
2025-08-10 00:00 UT   22 30 41.6   -10 20 24    88.657   89.621  161.7    0.2   251   21.4 
2025-08-11 00:00 UT   22 30 39.4   -10 20 36    88.653   89.621  162.7    0.2   251   21.4 
2025-08-12 00:00 UT   22 30 37.2   -10 20 47    88.649   89.622  163.7    0.2   252   21.4 
2025-08-13 00:00 UT   22 30 34.9   -10 20 59    88.645   89.622  164.6    0.2   252   21.4 
2025-08-14 00:00 UT   22 30 32.6   -10 21 11    88.641   89.623  165.6    0.2   252   21.4 
2025-08-15 00:00 UT   22 30 30.3   -10 21 22    88.638   89.623  166.6    0.2   252   21.4 
2025-08-16 00:00 UT   22 30 28.0   -10 21 34    88.635   89.624  167.5    0.1   253   21.4 
2025-08-17 00:00 UT   22 30 25.7   -10 21 46    88.632   89.625  168.5    0.1   253   21.4 
2025-08-18 00:00 UT   22 30 23.4   -10 21 58    88.629   89.625  169.5    0.1   253   21.4 
2025-08-19 00:00 UT   22 30 21.1   -10 22 10    88.627   89.626  170.5    0.1   254   21.4 
2025-08-20 00:00 UT   22 30 18.7   -10 22 22    88.625   89.626  171.4    0.1   255   21.4 
2025-08-21 00:00 UT   22 30 16.4   -10 22 34    88.624   89.627  172.4    0.1   255   21.4 
2025-08-22 00:00 UT   22 30 14.0   -10 22 46    88.622   89.628  173.4    0.1   256   21.4 
2025-08-23 00:00 UT   22 30 11.7   -10 22 58    88.621   89.628  174.3    0.1   258   21.4 
2025-08-24 00:00 UT   22 30 09.3   -10 23 10    88.621   89.629  175.3    0.1   260   21.4 
2025-08-25 00:00 UT   22 30 07.0   -10 23 22    88.620   89.629  176.2    0.0   262   21.4 
2025-08-26 00:00 UT   22 30 04.6   -10 23 34    88.620   89.630  177.2    0.0   267   21.4 
2025-08-27 00:00 UT   22 30 02.2   -10 23 46    88.620   89.630  178.1    0.0   277   21.4 
2025-08-28 00:00 UT   22 29 59.9   -10 23 58    88.621   89.631  178.8    0.0   300   21.4 
2025-08-29 00:00 UT   22 29 57.5   -10 24 10    88.621   89.632  179.1    0.0   353   21.3 
2025-08-30 00:00 UT   22 29 55.1   -10 24 22    88.623   89.632  178.5    0.0    32   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.