2018 RH73
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	7 Jun 2023	11.4	2.984 AU	2.439 AU	21h38m	-12°16'	112.9°	18.3°
Opposition	9 Aug 2023	10.3	3.048 AU	2.035 AU	21h13m	-12°45'	176.8°	1.1°

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 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
2023-06-07 00:00 UT   21 38 22.8   -12 16 53     2.439    2.984  112.9   18.3   250   11.4 
2023-06-07 21:22 UT   21 38 34.6   -12 14 34     2.429    2.985  113.7   18.1   250   11.4 
2023-06-08 00:00 UT   21 38 36.0   -12 14 17     2.428    2.985  113.8   18.1   250   11.4 
2023-06-09 00:00 UT   21 38 47.9   -12 11 47     2.416    2.986  114.7   18.0   250   11.4 
2023-06-10 00:00 UT   21 38 58.5   -12 09 22     2.405    2.987  115.6   17.9   250   11.4 
2023-06-11 00:00 UT   21 39 07.8   -12 07 04     2.394    2.988  116.5   17.7   250   11.4 
2023-06-12 00:00 UT   21 39 15.9   -12 04 51     2.382    2.989  117.4   17.6   250   11.3 
2023-06-13 00:00 UT   21 39 22.6   -12 02 45     2.371    2.990  118.3   17.4   250   11.3 
2023-06-14 00:00 UT   21 39 28.0   -12 00 44     2.360    2.991  119.2   17.2   250   11.3 
2023-06-15 00:00 UT   21 39 32.2   -11 58 50     2.350    2.992  120.1   17.1   250   11.3 
2023-06-16 00:00 UT   21 39 35.0   -11 57 02     2.339    2.993  121.1   16.9   250   11.3 
2023-06-17 00:00 UT   21 39 36.5   -11 55 21     2.328    2.994  122.0   16.7   250   11.3 
2023-06-18 00:00 UT   21 39 36.6   -11 53 45     2.318    2.994  123.0   16.5   250   11.3 
2023-06-19 00:00 UT   21 39 35.5   -11 52 16     2.307    2.995  123.9   16.3   250   11.2 
2023-06-20 00:00 UT   21 39 33.0   -11 50 53     2.297    2.996  124.9   16.2   250   11.2 
2023-06-21 00:00 UT   21 39 29.1   -11 49 37     2.287    2.997  125.8   16.0   250   11.2 
2023-06-22 00:00 UT   21 39 24.0   -11 48 27     2.277    2.998  126.8   15.7   249   11.2 
2023-06-23 00:00 UT   21 39 17.5   -11 47 24     2.267    2.999  127.8   15.5   249   11.2 
2023-06-24 00:00 UT   21 39 09.7   -11 46 27     2.258    3.000  128.7   15.3   249   11.2 
2023-06-25 00:00 UT   21 39 00.6   -11 45 37     2.248    3.001  129.7   15.1   249   11.1 
2023-06-26 00:00 UT   21 38 50.2   -11 44 53     2.239    3.002  130.7   14.9   249   11.1 
2023-06-27 00:00 UT   21 38 38.5   -11 44 15     2.230    3.003  131.7   14.6   249   11.1 
2023-06-28 00:00 UT   21 38 25.4   -11 43 44     2.221    3.004  132.7   14.4   249   11.1 
2023-06-29 00:00 UT   21 38 11.1   -11 43 19     2.212    3.005  133.7   14.2   249   11.1 
2023-06-30 00:00 UT   21 37 55.5   -11 43 01     2.203    3.006  134.7   13.9   249   11.1 
2023-07-01 00:00 UT   21 37 38.6   -11 42 49     2.194    3.007  135.7   13.6   249   11.0 
2023-07-02 00:00 UT   21 37 20.4   -11 42 44     2.186    3.008  136.8   13.4   249   11.0 
2023-07-03 00:00 UT   21 37 01.0   -11 42 45     2.178    3.009  137.8   13.1   249   11.0 
2023-07-04 00:00 UT   21 36 40.3   -11 42 52     2.170    3.010  138.8   12.8   248   11.0 
2023-07-05 00:00 UT   21 36 18.4   -11 43 05     2.162    3.011  139.8   12.6   248   11.0 
2023-07-06 00:00 UT   21 35 55.3   -11 43 25     2.155    3.012  140.9   12.3   248   11.0 
2023-07-07 00:00 UT   21 35 30.9   -11 43 51     2.147    3.013  141.9   12.0   248   10.9 

    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.