2018 RH73
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	15 Jan 2025	12.3	3.464 AU	3.322 AU	01h26m	+12°50'	90.0°	16.5°
Opposition	22 Dec 2025	10.8	3.410 AU	2.426 AU	06h03m	+24°34'	178.8°	0.3°

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 2018 RH73 are:

            e (Eccentricity)                : 0.1077209
            a (Semimajor axis)              : 3.1412981
            i (Inclination)                 : 3.82430
            Ω (Longitude of ascending node) : 282.99640
            ω (Argument of perihelion)      : 313.75150
            M (Mean anomaly)                : 38.72367
            Epoch                           : 2023 Feb 25

            L (Longitude of perihelion)     : 236.81170
            B (Latitude of perihelion)      : -2.76149
            P (Orbital period in years)     : 5.57            
        

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
2025-01-15 00:00 UT   01 26 21.3   +12 50 51     3.322    3.464   90.0   16.5    68   12.3 
2025-01-15 10:19 UT   01 26 36.4   +12 51 45     3.328    3.465   89.6   16.5    68   12.4 
2025-01-16 00:00 UT   01 26 56.7   +12 52 58     3.337    3.465   89.1   16.5    68   12.4 
2025-01-17 00:00 UT   01 27 33.1   +12 55 11     3.352    3.465   88.3   16.5    68   12.4 
2025-01-18 00:00 UT   01 28 10.2   +12 57 28     3.368    3.465   87.4   16.5    68   12.4 
2025-01-19 00:00 UT   01 28 48.2   +12 59 51     3.383    3.465   86.5   16.5    68   12.4 
2025-01-20 00:00 UT   01 29 27.0   +13 02 19     3.398    3.466   85.7   16.4    68   12.4 
2025-01-21 00:00 UT   01 30 06.6   +13 04 52     3.413    3.466   84.8   16.4    68   12.4 
2025-01-22 00:00 UT   01 30 47.1   +13 07 30     3.428    3.466   84.0   16.4    68   12.4 
2025-01-23 00:00 UT   01 31 28.3   +13 10 13     3.443    3.467   83.1   16.4    68   12.4 
2025-01-24 00:00 UT   01 32 10.3   +13 13 01     3.459    3.467   82.3   16.3    68   12.4 
2025-01-25 00:00 UT   01 32 53.0   +13 15 53     3.474    3.467   81.5   16.3    68   12.4 
2025-01-26 00:00 UT   01 33 36.5   +13 18 50     3.489    3.467   80.6   16.3    68   12.5 
2025-01-27 00:00 UT   01 34 20.8   +13 21 51     3.504    3.468   79.8   16.2    68   12.5 
2025-01-28 00:00 UT   01 35 05.8   +13 24 57     3.519    3.468   79.0   16.2    68   12.5 
2025-01-29 00:00 UT   01 35 51.5   +13 28 07     3.534    3.468   78.2   16.1    68   12.5 
2025-01-30 00:00 UT   01 36 38.0   +13 31 22     3.548    3.468   77.3   16.1    68   12.5 
2025-01-31 00:00 UT   01 37 25.2   +13 34 40     3.563    3.469   76.5   16.0    68   12.5 
2025-02-01 00:00 UT   01 38 13.0   +13 38 03     3.578    3.469   75.7   16.0    68   12.5 
2025-02-02 00:00 UT   01 39 01.6   +13 41 30     3.593    3.469   74.9   15.9    68   12.5 
2025-02-03 00:00 UT   01 39 50.8   +13 45 01     3.607    3.469   74.1   15.9    68   12.5 
2025-02-04 00:00 UT   01 40 40.7   +13 48 35     3.622    3.470   73.3   15.8    68   12.5 
2025-02-05 00:00 UT   01 41 31.2   +13 52 14     3.637    3.470   72.5   15.7    68   12.5 
2025-02-06 00:00 UT   01 42 22.4   +13 55 55     3.651    3.470   71.7   15.7    68   12.5 
2025-02-07 00:00 UT   01 43 14.3   +13 59 41     3.665    3.470   70.9   15.6    68   12.5 
2025-02-08 00:00 UT   01 44 06.7   +14 03 30     3.680    3.470   70.1   15.5    68   12.5 
2025-02-09 00:00 UT   01 44 59.8   +14 07 22     3.694    3.471   69.3   15.4    68   12.5 
2025-02-10 00:00 UT   01 45 53.4   +14 11 17     3.708    3.471   68.5   15.3    68   12.6 
2025-02-11 00:00 UT   01 46 47.7   +14 15 16     3.722    3.471   67.8   15.3    68   12.6 
2025-02-12 00:00 UT   01 47 42.5   +14 19 18     3.736    3.471   67.0   15.2    68   12.6 
2025-02-13 00:00 UT   01 48 37.9   +14 23 22     3.750    3.471   66.2   15.1    68   12.6 
2025-02-14 00:00 UT   01 49 33.9   +14 27 30     3.764    3.472   65.4   15.0    68   12.6 

    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.