(225088) Gonggong
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	19 Apr 2025	21.5	89.554 AU	90.153 AU	22h31m	-10°17'	53.1°	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
2025-04-19 00:00 UT   22 31 36.1   -10 17 18    90.153   89.554   53.1    0.5   248   21.5 
2025-04-19 21:59 UT   22 31 37.6   -10 17 08    90.141   89.555   54.0    0.5   248   21.5 
2025-04-20 00:00 UT   22 31 37.7   -10 17 07    90.140   89.555   54.1    0.5   248   21.5 
2025-04-21 00:00 UT   22 31 39.3   -10 16 56    90.127   89.555   55.0    0.5   248   21.5 
2025-04-22 00:00 UT   22 31 40.9   -10 16 46    90.114   89.556   56.0    0.5   248   21.5 
2025-04-23 00:00 UT   22 31 42.4   -10 16 36    90.100   89.556   57.0    0.5   248   21.5 
2025-04-24 00:00 UT   22 31 44.0   -10 16 26    90.086   89.557   57.9    0.5   248   21.5 
2025-04-25 00:00 UT   22 31 45.4   -10 16 16    90.073   89.557   58.9    0.6   248   21.5 
2025-04-26 00:00 UT   22 31 46.8   -10 16 07    90.059   89.558   59.9    0.6   248   21.5 
2025-04-27 00:00 UT   22 31 48.2   -10 15 57    90.044   89.559   60.8    0.6   248   21.5 
2025-04-28 00:00 UT   22 31 49.6   -10 15 48    90.030   89.559   61.8    0.6   248   21.5 
2025-04-29 00:00 UT   22 31 50.9   -10 15 40    90.016   89.560   62.8    0.6   248   21.5 
2025-04-30 00:00 UT   22 31 52.2   -10 15 31    90.001   89.560   63.7    0.6   248   21.5 
2025-05-01 00:00 UT   22 31 53.5   -10 15 23    89.987   89.561   64.7    0.6   248   21.5 
2025-05-02 00:00 UT   22 31 54.7   -10 15 14    89.972   89.562   65.7    0.6   248   21.5 
2025-05-03 00:00 UT   22 31 55.8   -10 15 06    89.957   89.562   66.6    0.6   248   21.5 
2025-05-04 00:00 UT   22 31 57.0   -10 14 59    89.942   89.563   67.6    0.6   248   21.5 
2025-05-05 00:00 UT   22 31 58.1   -10 14 51    89.927   89.563   68.6    0.6   248   21.5 
2025-05-06 00:00 UT   22 31 59.1   -10 14 44    89.911   89.564   69.5    0.6   248   21.5 
2025-05-07 00:00 UT   22 32 00.1   -10 14 37    89.896   89.564   70.5    0.6   248   21.5 
2025-05-08 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 

    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.