2019 RO2
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	15 Dec 2025	31.7	3.612 AU	4.418 AU	15h16m	-18°38'	31.2°	8.1°

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 2019 RO2 are:

            e (Eccentricity)                : 0.5703203
            a (Semimajor axis)              : 2.4245373
            i (Inclination)                 : 1.56476
            Ω (Longitude of ascending node) : 21.86527
            ω (Argument of perihelion)      : 5.27939
            M (Mean anomaly)                : 221.26186
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 27.14270
            B (Latitude of perihelion)      : 0.14396
            P (Orbital period in years)     : 3.78            
        

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.

Ephemerides:

Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2025-12-15 00:00 UT   15 16 25.0   -18 38 02     4.418    3.612   31.2    8.1   284   31.7 
2025-12-15 12:13 UT   15 16 59.2   -18 40 18     4.412    3.611   31.6    8.2   284   31.7 
2025-12-16 00:00 UT   15 17 32.1   -18 42 29     4.407    3.610   32.0    8.3   284   31.7 
2025-12-17 00:00 UT   15 18 39.0   -18 46 54     4.396    3.608   32.7    8.5   284   31.7 
2025-12-18 00:00 UT   15 19 45.9   -18 51 16     4.386    3.606   33.5    8.7   284   31.7 
2025-12-19 00:00 UT   15 20 52.6   -18 55 37     4.375    3.604   34.2    8.8   284   31.7 
2025-12-20 00:00 UT   15 21 59.1   -18 59 56     4.363    3.601   35.0    9.0   284   31.7 
2025-12-21 00:00 UT   15 23 05.5   -19 04 13     4.352    3.599   35.7    9.2   284   31.7 
2025-12-22 00:00 UT   15 24 11.7   -19 08 27     4.340    3.597   36.5    9.4   284   31.7 
2025-12-23 00:00 UT   15 25 17.8   -19 12 39     4.329    3.595   37.2    9.5   284   31.7 
2025-12-24 00:00 UT   15 26 23.6   -19 16 50     4.317    3.592   38.0    9.7   284   31.7 
2025-12-25 00:00 UT   15 27 29.3   -19 20 58     4.305    3.590   38.7    9.9   284   31.7 
2025-12-26 00:00 UT   15 28 34.8   -19 25 03     4.292    3.588   39.5   10.0   284   31.7 
2025-12-27 00:00 UT   15 29 40.1   -19 29 07     4.280    3.585   40.2   10.2   283   31.7 
2025-12-28 00:00 UT   15 30 45.2   -19 33 08     4.267    3.583   41.0   10.4   283   31.7 
2025-12-29 00:00 UT   15 31 50.0   -19 37 07     4.254    3.581   41.7   10.5   283   31.7 
2025-12-30 00:00 UT   15 32 54.6   -19 41 04     4.242    3.578   42.5   10.7   283   31.7 
2025-12-31 00:00 UT   15 33 59.0   -19 44 59     4.228    3.576   43.2   10.9   283   31.7 
2026-01-01 00:00 UT   15 35 03.2   -19 48 51     4.215    3.574   44.0   11.0   283   31.7 
2026-01-02 00:00 UT   15 36 07.1   -19 52 41     4.202    3.571   44.8   11.2   283   31.7 
2026-01-03 00:00 UT   15 37 10.8   -19 56 29     4.188    3.569   45.5   11.3   283   31.7 
2026-01-04 00:00 UT   15 38 14.2   -20 00 15     4.175    3.567   46.3   11.5   283   31.7 
2026-01-05 00:00 UT   15 39 17.3   -20 03 58     4.161    3.564   47.0   11.7   283   31.7 
2026-01-06 00:00 UT   15 40 20.2   -20 07 39     4.147    3.562   47.8   11.8   283   31.7 
2026-01-07 00:00 UT   15 41 22.7   -20 11 18     4.133    3.559   48.6   12.0   283   31.7 
2026-01-08 00:00 UT   15 42 25.0   -20 14 54     4.118    3.557   49.3   12.1   283   31.7 
2026-01-09 00:00 UT   15 43 27.0   -20 18 29     4.104    3.554   50.1   12.3   282   31.7 
2026-01-10 00:00 UT   15 44 28.7   -20 22 00     4.089    3.552   50.9   12.4   282   31.7 
2026-01-11 00:00 UT   15 45 30.0   -20 25 30     4.075    3.549   51.7   12.6   282   31.7 
2026-01-12 00:00 UT   15 46 31.0   -20 28 57     4.060    3.547   52.4   12.7   282   31.7 
2026-01-13 00:00 UT   15 47 31.7   -20 32 22     4.045    3.544   53.2   12.8   282   31.7 
2026-01-14 00:00 UT   15 48 32.0   -20 35 44     4.030    3.542   54.0   13.0   282   31.7 

    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.