2020 RA4
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	28 May 2026	32.7	3.530 AU	3.033 AU	11h45m	-02°48'	111.3°	15.5°

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
2026-05-28 00:00 UT   11 45 12.9   -02 48 56     3.033    3.530  111.3   15.5   112   32.7 
2026-05-28 18:47 UT   11 45 10.2   -02 48 39     3.042    3.528  110.6   15.6   112   32.7 
2026-05-29 00:00 UT   11 45 09.6   -02 48 35     3.045    3.528  110.4   15.6   112   32.7 
2026-05-30 00:00 UT   11 45 07.5   -02 48 20     3.058    3.527  109.4   15.7   112   32.7 
2026-05-31 00:00 UT   11 45 06.5   -02 48 12     3.071    3.525  108.4   15.8   112   32.7 
2026-06-01 00:00 UT   11 45 06.6   -02 48 11     3.083    3.523  107.5   15.9   112   32.7 
2026-06-02 00:00 UT   11 45 07.8   -02 48 17     3.096    3.522  106.5   16.0   112   32.8 
2026-06-03 00:00 UT   11 45 10.1   -02 48 29     3.109    3.520  105.6   16.1   112   32.8 
2026-06-04 00:00 UT   11 45 13.5   -02 48 48     3.122    3.518  104.6   16.2   112   32.8 
2026-06-05 00:00 UT   11 45 17.9   -02 49 14     3.135    3.517  103.7   16.3   112   32.8 
2026-06-06 00:00 UT   11 45 23.4   -02 49 46     3.148    3.515  102.8   16.4   113   32.8 
2026-06-07 00:00 UT   11 45 30.0   -02 50 24     3.162    3.513  101.9   16.4   113   32.8 
2026-06-08 00:00 UT   11 45 37.6   -02 51 09     3.175    3.512  100.9   16.5   113   32.8 
2026-06-09 00:00 UT   11 45 46.2   -02 52 01     3.188    3.510  100.0   16.5   113   32.8 
2026-06-10 00:00 UT   11 45 55.9   -02 52 59     3.201    3.508   99.1   16.6   113   32.8 
2026-06-11 00:00 UT   11 46 06.5   -02 54 04     3.214    3.506   98.2   16.7   113   32.8 
2026-06-12 00:00 UT   11 46 18.2   -02 55 14     3.228    3.505   97.3   16.7   113   32.9 
2026-06-13 00:00 UT   11 46 30.9   -02 56 31     3.241    3.503   96.4   16.7   113   32.9 
2026-06-14 00:00 UT   11 46 44.5   -02 57 55     3.254    3.501   95.5   16.8   113   32.9 
2026-06-15 00:00 UT   11 46 59.1   -02 59 25     3.268    3.499   94.6   16.8   113   32.9 
2026-06-16 00:00 UT   11 47 14.7   -03 01 00     3.281    3.497   93.7   16.8   113   32.9 
2026-06-17 00:00 UT   11 47 31.3   -03 02 43     3.294    3.495   92.9   16.9   113   32.9 
2026-06-18 00:00 UT   11 47 48.8   -03 04 31     3.308    3.494   92.0   16.9   113   32.9 
2026-06-19 00:00 UT   11 48 07.2   -03 06 25     3.321    3.492   91.1   16.9   113   32.9 
2026-06-20 00:00 UT   11 48 26.5   -03 08 25     3.334    3.490   90.3   16.9   113   32.9 
2026-06-21 00:00 UT   11 48 46.8   -03 10 31     3.348    3.488   89.4   16.9   114   32.9 
2026-06-22 00:00 UT   11 49 07.9   -03 12 43     3.361    3.486   88.5   16.9   114   32.9 
2026-06-23 00:00 UT   11 49 29.9   -03 15 00     3.374    3.484   87.7   16.9   114   33.0 
2026-06-24 00:00 UT   11 49 52.8   -03 17 24     3.387    3.482   86.8   16.9   114   33.0 
2026-06-25 00:00 UT   11 50 16.5   -03 19 53     3.400    3.480   86.0   16.9   114   33.0 
2026-06-26 00:00 UT   11 50 41.1   -03 22 27     3.414    3.478   85.2   16.9   114   33.0 
2026-06-27 00:00 UT   11 51 06.5   -03 25 07     3.427    3.476   84.3   16.9   114   33.0 

    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.