2020 RA4
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	27 Apr 2026	32.3	3.573 AU	2.708 AU	11h56m	-03°55'	144.2°	9.5°

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 2020 RA4 are:

            e (Eccentricity)                : 0.5578840
            a (Semimajor axis)              : 2.3287101
            i (Inclination)                 : 9.80770
            Ω (Longitude of ascending node) : 352.66060
            ω (Argument of perihelion)      : 8.83015
            M (Mean anomaly)                : 162.46033
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 1.36369
            B (Latitude of perihelion)      : 1.49837
            P (Orbital period in years)     : 3.55            
        

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
2026-04-27 00:00 UT   11 56 33.2   -03 55 30     2.708    3.573  144.2    9.5   108   32.3 
2026-04-27 15:27 UT   11 56 08.0   -03 53 07     2.713    3.572  143.5    9.7   108   32.3 
2026-04-28 00:00 UT   11 55 54.2   -03 51 49     2.715    3.571  143.1    9.8   108   32.3 
2026-04-29 00:00 UT   11 55 16.1   -03 48 13     2.723    3.570  141.9   10.0   108   32.3 
2026-04-30 00:00 UT   11 54 39.2   -03 44 42     2.731    3.569  140.8   10.3   109   32.3 
2026-05-01 00:00 UT   11 54 03.3   -03 41 17     2.740    3.568  139.7   10.5   109   32.3 
2026-05-02 00:00 UT   11 53 28.5   -03 37 58     2.748    3.566  138.5   10.8   109   32.3 
2026-05-03 00:00 UT   11 52 54.8   -03 34 44     2.757    3.565  137.4   11.0   109   32.4 
2026-05-04 00:00 UT   11 52 22.3   -03 31 36     2.766    3.564  136.3   11.3   109   32.4 
2026-05-05 00:00 UT   11 51 50.9   -03 28 34     2.775    3.563  135.2   11.5   109   32.4 
2026-05-06 00:00 UT   11 51 20.6   -03 25 38     2.785    3.561  134.1   11.7   110   32.4 
2026-05-07 00:00 UT   11 50 51.5   -03 22 48     2.795    3.560  133.0   12.0   110   32.4 
2026-05-08 00:00 UT   11 50 23.5   -03 20 05     2.804    3.559  131.9   12.2   110   32.4 
2026-05-09 00:00 UT   11 49 56.7   -03 17 27     2.814    3.557  130.9   12.4   110   32.4 
2026-05-10 00:00 UT   11 49 31.1   -03 14 57     2.825    3.556  129.8   12.6   110   32.5 
2026-05-11 00:00 UT   11 49 06.6   -03 12 32     2.835    3.555  128.7   12.8   110   32.5 
2026-05-12 00:00 UT   11 48 43.4   -03 10 14     2.845    3.553  127.6   13.0   110   32.5 
2026-05-13 00:00 UT   11 48 21.3   -03 08 03     2.856    3.552  126.6   13.2   110   32.5 
2026-05-14 00:00 UT   11 48 00.4   -03 05 59     2.867    3.551  125.5   13.4   111   32.5 
2026-05-15 00:00 UT   11 47 40.7   -03 04 01     2.878    3.549  124.5   13.6   111   32.5 
2026-05-16 00:00 UT   11 47 22.2   -03 02 10     2.889    3.548  123.4   13.8   111   32.5 
2026-05-17 00:00 UT   11 47 04.9   -03 00 26     2.900    3.546  122.4   13.9   111   32.6 
2026-05-18 00:00 UT   11 46 48.8   -02 58 48     2.912    3.545  121.4   14.1   111   32.6 
2026-05-19 00:00 UT   11 46 33.9   -02 57 18     2.923    3.543  120.3   14.3   111   32.6 
2026-05-20 00:00 UT   11 46 20.2   -02 55 54     2.935    3.542  119.3   14.4   111   32.6 
2026-05-21 00:00 UT   11 46 07.7   -02 54 38     2.947    3.540  118.3   14.6   111   32.6 
2026-05-22 00:00 UT   11 45 56.4   -02 53 28     2.959    3.539  117.3   14.7   111   32.6 
2026-05-23 00:00 UT   11 45 46.2   -02 52 26     2.971    3.537  116.3   14.9   111   32.6 
2026-05-24 00:00 UT   11 45 37.2   -02 51 30     2.983    3.536  115.3   15.0   112   32.6 
2026-05-25 00:00 UT   11 45 29.4   -02 50 41     2.995    3.534  114.3   15.1   112   32.7 
2026-05-26 00:00 UT   11 45 22.7   -02 49 59     3.008    3.533  113.3   15.3   112   32.7 
2026-05-27 00:00 UT   11 45 17.2   -02 49 24     3.020    3.531  112.3   15.4   112   32.7 

    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.