(225088) Gonggong
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	13 Mar 2025	21.4	89.532 AU	90.482 AU	22h30m	-10°25'	16.9°	0.2°
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
2025-03-13 00:00 UT   22 30 16.4   -10 25 52    90.482   89.532   16.9    0.2   245   21.4 
2025-03-13 17:01 UT   22 30 18.2   -10 25 41    90.479   89.533   17.6    0.2   245   21.4 
2025-03-14 00:00 UT   22 30 18.9   -10 25 36    90.478   89.533   17.9    0.2   245   21.4 
2025-03-15 00:00 UT   22 30 21.4   -10 25 20    90.473   89.534   18.9    0.2   246   21.4 
2025-03-16 00:00 UT   22 30 23.9   -10 25 04    90.468   89.534   19.9    0.2   246   21.4 
2025-03-17 00:00 UT   22 30 26.4   -10 24 48    90.463   89.535   20.9    0.2   246   21.4 
2025-03-18 00:00 UT   22 30 28.8   -10 24 32    90.458   89.535   21.9    0.2   246   21.4 
2025-03-19 00:00 UT   22 30 31.3   -10 24 16    90.452   89.536   22.8    0.2   246   21.4 
2025-03-20 00:00 UT   22 30 33.7   -10 24 01    90.446   89.536   23.8    0.3   246   21.4 
2025-03-21 00:00 UT   22 30 36.1   -10 23 45    90.440   89.537   24.8    0.3   246   21.4 
2025-03-22 00:00 UT   22 30 38.5   -10 23 30    90.433   89.538   25.8    0.3   246   21.5 
2025-03-23 00:00 UT   22 30 40.9   -10 23 15    90.427   89.538   26.8    0.3   247   21.5 
2025-03-24 00:00 UT   22 30 43.3   -10 22 59    90.420   89.539   27.8    0.3   247   21.5 
2025-03-25 00:00 UT   22 30 45.6   -10 22 44    90.412   89.539   28.7    0.3   247   21.5 
2025-03-26 00:00 UT   22 30 47.9   -10 22 29    90.405   89.540   29.7    0.3   247   21.5 
2025-03-27 00:00 UT   22 30 50.2   -10 22 15    90.397   89.541   30.7    0.3   247   21.5 
2025-03-28 00:00 UT   22 30 52.5   -10 21 60    90.389   89.541   31.7    0.3   247   21.5 
2025-03-29 00:00 UT   22 30 54.8   -10 21 45    90.380   89.542   32.6    0.3   247   21.5 
2025-03-30 00:00 UT   22 30 57.0   -10 21 31    90.372   89.542   33.6    0.4   247   21.5 
2025-03-31 00:00 UT   22 30 59.2   -10 21 17    90.363   89.543   34.6    0.4   247   21.5 
2025-04-01 00:00 UT   22 31 01.4   -10 21 03    90.354   89.543   35.6    0.4   247   21.5 
2025-04-02 00:00 UT   22 31 03.6   -10 20 49    90.345   89.544   36.6    0.4   247   21.5 
2025-04-03 00:00 UT   22 31 05.7   -10 20 35    90.335   89.545   37.5    0.4   247   21.5 
2025-04-04 00:00 UT   22 31 07.8   -10 20 21    90.325   89.545   38.5    0.4   247   21.5 
2025-04-05 00:00 UT   22 31 09.9   -10 20 08    90.315   89.546   39.5    0.4   247   21.5 
2025-04-06 00:00 UT   22 31 12.0   -10 19 55    90.305   89.546   40.5    0.4   247   21.5 
2025-04-07 00:00 UT   22 31 14.0   -10 19 41    90.295   89.547   41.4    0.4   247   21.5 
2025-04-08 00:00 UT   22 31 16.0   -10 19 28    90.284   89.548   42.4    0.4   247   21.5 
2025-04-09 00:00 UT   22 31 18.0   -10 19 16    90.273   89.548   43.4    0.4   247   21.5 
2025-04-10 00:00 UT   22 31 19.9   -10 19 03    90.262   89.549   44.4    0.4   247   21.5 
2025-04-11 00:00 UT   22 31 21.8   -10 18 51    90.251   89.549   45.3    0.5   247   21.5 
2025-04-12 00:00 UT   22 31 23.7   -10 18 38    90.239   89.550   46.3    0.5   247   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.