(225088) Gonggong
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	7 May 2025	21.5	89.564 AU	89.896 AU	22h32m	-10°14'	70.5°	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
2025-05-07 00:00 UT   22 32 00.1   -10 14 37    89.896   89.564   70.5    0.6   248   21.5 
2025-05-07 01:32 UT   22 32 00.2   -10 14 36    89.895   89.565   70.6    0.6   248   21.5 
2025-05-08 00:00 UT   22 32 01.1   -10 14 30    89.881   89.565   71.5    0.6   248   21.5 
2025-05-09 00:00 UT   22 32 02.1   -10 14 24    89.865   89.566   72.4    0.6   248   21.5 
2025-05-10 00:00 UT   22 32 03.0   -10 14 17    89.849   89.566   73.4    0.6   248   21.5 
2025-05-11 00:00 UT   22 32 03.8   -10 14 11    89.834   89.567   74.3    0.6   248   21.5 
2025-05-12 00:00 UT   22 32 04.6   -10 14 05    89.818   89.567   75.3    0.6   248   21.5 
2025-05-13 00:00 UT   22 32 05.4   -10 13 60    89.802   89.568   76.3    0.6   248   21.5 
2025-05-14 00:00 UT   22 32 06.1   -10 13 54    89.786   89.569   77.2    0.6   248   21.5 
2025-05-15 00:00 UT   22 32 06.8   -10 13 49    89.770   89.569   78.2    0.6   248   21.5 
2025-05-16 00:00 UT   22 32 07.5   -10 13 44    89.754   89.570   79.1    0.6   248   21.5 
2025-05-17 00:00 UT   22 32 08.1   -10 13 40    89.738   89.570   80.1    0.6   248   21.5 
2025-05-18 00:00 UT   22 32 08.7   -10 13 35    89.722   89.571   81.1    0.6   248   21.5 
2025-05-19 00:00 UT   22 32 09.2   -10 13 31    89.706   89.571   82.0    0.6   248   21.5 
2025-05-20 00:00 UT   22 32 09.7   -10 13 27    89.690   89.572   83.0    0.6   248   21.5 
2025-05-21 00:00 UT   22 32 10.2   -10 13 23    89.673   89.573   84.0    0.6   248   21.5 
2025-05-22 00:00 UT   22 32 10.6   -10 13 20    89.657   89.573   84.9    0.6   248   21.5 
2025-05-23 00:00 UT   22 32 11.0   -10 13 17    89.641   89.574   85.9    0.6   248   21.5 
2025-05-24 00:00 UT   22 32 11.3   -10 13 14    89.624   89.574   86.8    0.6   248   21.5 
2025-05-25 00:00 UT   22 32 11.6   -10 13 11    89.608   89.575   87.8    0.6   248   21.5 
2025-05-26 00:00 UT   22 32 11.8   -10 13 09    89.592   89.576   88.8    0.6   248   21.5 
2025-05-27 00:00 UT   22 32 12.0   -10 13 06    89.575   89.576   89.7    0.6   248   21.5 
2025-05-28 00:00 UT   22 32 12.2   -10 13 04    89.559   89.577   90.7    0.6   248   21.5 
2025-05-29 00:00 UT   22 32 12.3   -10 13 03    89.542   89.577   91.6    0.6   248   21.5 
2025-05-30 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 

    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.