2020 RA4
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	3 Nov 2025	33.3	3.586 AU	4.327 AU	12h11m	-01°27'	37.1°	9.6°

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
2025-11-03 00:00 UT   12 11 57.7   -01 27 31     4.327    3.586   37.1    9.6   293   33.3 
2025-11-03 23:23 UT   12 12 51.4   -01 34 13     4.318    3.587   37.9    9.8   293   33.3 
2025-11-04 00:00 UT   12 12 52.8   -01 34 24     4.318    3.587   37.9    9.8   293   33.3 
2025-11-05 00:00 UT   12 13 47.6   -01 41 15     4.309    3.588   38.6    9.9   293   33.3 
2025-11-06 00:00 UT   12 14 42.1   -01 48 04     4.300    3.589   39.4   10.1   293   33.3 
2025-11-07 00:00 UT   12 15 36.3   -01 54 51     4.291    3.590   40.1   10.2   293   33.3 
2025-11-08 00:00 UT   12 16 30.1   -02 01 36     4.281    3.591   40.9   10.4   293   33.3 
2025-11-09 00:00 UT   12 17 23.7   -02 08 20     4.272    3.592   41.6   10.6   293   33.3 
2025-11-10 00:00 UT   12 18 16.9   -02 15 01     4.262    3.593   42.4   10.7   293   33.3 
2025-11-11 00:00 UT   12 19 09.8   -02 21 40     4.252    3.594   43.2   10.9   293   33.3 
2025-11-12 00:00 UT   12 20 02.3   -02 28 18     4.242    3.595   43.9   11.0   293   33.3 
2025-11-13 00:00 UT   12 20 54.5   -02 34 53     4.232    3.596   44.7   11.2   293   33.3 
2025-11-14 00:00 UT   12 21 46.4   -02 41 26     4.221    3.597   45.4   11.3   293   33.3 
2025-11-15 00:00 UT   12 22 37.8   -02 47 57     4.211    3.598   46.2   11.4   293   33.3 
2025-11-16 00:00 UT   12 23 28.9   -02 54 26     4.200    3.599   47.0   11.6   293   33.3 
2025-11-17 00:00 UT   12 24 19.7   -03 00 52     4.189    3.599   47.8   11.7   293   33.3 
2025-11-18 00:00 UT   12 25 10.0   -03 07 16     4.178    3.600   48.5   11.9   293   33.3 
2025-11-19 00:00 UT   12 25 59.9   -03 13 37     4.167    3.601   49.3   12.0   293   33.3 
2025-11-20 00:00 UT   12 26 49.5   -03 19 57     4.155    3.602   50.1   12.1   293   33.3 
2025-11-21 00:00 UT   12 27 38.6   -03 26 13     4.144    3.603   50.9   12.3   293   33.3 
2025-11-22 00:00 UT   12 28 27.3   -03 32 27     4.132    3.604   51.6   12.4   293   33.3 
2025-11-23 00:00 UT   12 29 15.5   -03 38 39     4.120    3.604   52.4   12.5   293   33.3 
2025-11-24 00:00 UT   12 30 03.3   -03 44 47     4.108    3.605   53.2   12.7   293   33.3 
2025-11-25 00:00 UT   12 30 50.7   -03 50 54     4.096    3.606   54.0   12.8   293   33.3 
2025-11-26 00:00 UT   12 31 37.6   -03 56 57     4.084    3.607   54.8   12.9   293   33.3 
2025-11-27 00:00 UT   12 32 24.0   -04 02 57     4.072    3.607   55.6   13.0   293   33.3 
2025-11-28 00:00 UT   12 33 10.0   -04 08 55     4.059    3.608   56.4   13.2   293   33.3 
2025-11-29 00:00 UT   12 33 55.4   -04 14 50     4.047    3.609   57.2   13.3   293   33.3 
2025-11-30 00:00 UT   12 34 40.4   -04 20 42     4.034    3.609   58.0   13.4   293   33.3 
2025-12-01 00:00 UT   12 35 24.9   -04 26 31     4.021    3.610   58.8   13.5   293   33.3 
2025-12-02 00:00 UT   12 36 08.9   -04 32 17     4.008    3.611   59.6   13.6   293   33.3 
2025-12-03 00:00 UT   12 36 52.3   -04 38 00     3.995    3.611   60.4   13.7   293   33.3 

    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.