2018 RH73
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	15 Sep 2024	11.6	3.412 AU	2.604 AU	02h03m	+17°46'	137.2°	11.5°
Opposition	21 Oct 2024	11.0	3.431 AU	2.439 AU	01h40m	+15°56'	174.8°	1.5°

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
2024-09-15 00:00 UT   02 03 21.5   +17 46 41     2.604    3.412  137.2   11.5   245   11.6 
2024-09-15 15:33 UT   02 03 06.2   +17 46 00     2.598    3.412  137.9   11.4   244   11.6 
2024-09-16 00:00 UT   02 02 57.8   +17 45 37     2.595    3.412  138.3   11.3   244   11.6 
2024-09-17 00:00 UT   02 02 32.9   +17 44 25     2.587    3.413  139.4   11.1   244   11.6 
2024-09-18 00:00 UT   02 02 07.0   +17 43 06     2.578    3.413  140.4   10.8   244   11.6 
2024-09-19 00:00 UT   02 01 40.0   +17 41 40     2.570    3.414  141.5   10.6   244   11.5 
2024-09-20 00:00 UT   02 01 11.9   +17 40 06     2.562    3.414  142.6   10.3   243   11.5 
2024-09-21 00:00 UT   02 00 42.8   +17 38 26     2.554    3.415  143.7   10.0   243   11.5 
2024-09-22 00:00 UT   02 00 12.7   +17 36 39     2.546    3.416  144.7    9.8   243   11.5 
2024-09-23 00:00 UT   01 59 41.5   +17 34 44     2.539    3.416  145.8    9.5   242   11.5 
2024-09-24 00:00 UT   01 59 09.4   +17 32 42     2.532    3.417  146.9    9.2   242   11.5 
2024-09-25 00:00 UT   01 58 36.3   +17 30 33     2.525    3.417  148.0    8.9   242   11.4 
2024-09-26 00:00 UT   01 58 02.3   +17 28 18     2.518    3.418  149.1    8.7   241   11.4 
2024-09-27 00:00 UT   01 57 27.4   +17 25 55     2.512    3.418  150.2    8.4   241   11.4 
2024-09-28 00:00 UT   01 56 51.6   +17 23 25     2.506    3.419  151.3    8.1   240   11.4 
2024-09-29 00:00 UT   01 56 14.9   +17 20 49     2.500    3.419  152.5    7.8   240   11.4 
2024-09-30 00:00 UT   01 55 37.4   +17 18 05     2.494    3.420  153.6    7.5   239   11.4 
2024-10-01 00:00 UT   01 54 59.1   +17 15 15     2.488    3.420  154.7    7.2   239   11.3 
2024-10-02 00:00 UT   01 54 20.1   +17 12 19     2.483    3.421  155.8    6.9   238   11.3 
2024-10-03 00:00 UT   01 53 40.3   +17 09 16     2.478    3.422  156.9    6.6   237   11.3 
2024-10-04 00:00 UT   01 52 59.9   +17 06 07     2.474    3.422  158.0    6.3   236   11.3 
2024-10-05 00:00 UT   01 52 18.8   +17 02 51     2.469    3.423  159.2    6.0   236   11.3 
2024-10-06 00:00 UT   01 51 37.1   +16 59 30     2.465    3.423  160.3    5.7   235   11.2 
2024-10-07 00:00 UT   01 50 54.8   +16 56 02     2.461    3.424  161.4    5.3   234   11.2 
2024-10-08 00:00 UT   01 50 12.0   +16 52 29     2.458    3.424  162.5    5.0   233   11.2 
2024-10-09 00:00 UT   01 49 28.7   +16 48 50     2.455    3.425  163.6    4.7   231   11.2 
2024-10-10 00:00 UT   01 48 45.0   +16 45 06     2.452    3.425  164.7    4.4   230   11.2 
2024-10-11 00:00 UT   01 48 00.8   +16 41 17     2.449    3.426  165.8    4.1   228   11.1 
2024-10-12 00:00 UT   01 47 16.3   +16 37 23     2.447    3.426  166.9    3.8   226   11.1 
2024-10-13 00:00 UT   01 46 31.5   +16 33 24     2.445    3.427  168.0    3.5   224   11.1 
2024-10-14 00:00 UT   01 45 46.4   +16 29 20     2.443    3.427  169.1    3.2   221   11.1 
2024-10-15 00:00 UT   01 45 01.0   +16 25 12     2.441    3.428  170.1    2.9   218   11.1 

    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.