2020 RA4
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	14 Mar 2026	32.0	3.612 AU	2.654 AU	12h35m	-07°09'	161.9°	4.9°

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
2026-03-14 00:00 UT   12 35 01.7   -07 09 57     2.654    3.612  161.9    4.9   303   32.0 
2026-03-14 07:39 UT   12 34 44.9   -07 08 45     2.652    3.612  162.3    4.8   303   32.0 
2026-03-15 00:00 UT   12 34 08.8   -07 06 08     2.649    3.612  163.1    4.6   304   32.0 
2026-03-16 00:00 UT   12 33 15.3   -07 02 14     2.643    3.611  164.3    4.3   305   32.0 
2026-03-17 00:00 UT   12 32 21.3   -06 58 14     2.639    3.610  165.5    4.0   306   32.0 
2026-03-18 00:00 UT   12 31 26.8   -06 54 10     2.634    3.610  166.7    3.6   307   31.9 
2026-03-19 00:00 UT   12 30 31.8   -06 50 02     2.630    3.609  167.9    3.3   309   31.9 
2026-03-20 00:00 UT   12 29 36.4   -06 45 50     2.626    3.608  169.1    3.0   311   31.9 
2026-03-21 00:00 UT   12 28 40.7   -06 41 33     2.622    3.608  170.2    2.7   313   31.9 
2026-03-22 00:00 UT   12 27 44.6   -06 37 13     2.619    3.607  171.4    2.4   316   31.8 
2026-03-23 00:00 UT   12 26 48.3   -06 32 49     2.616    3.606  172.5    2.1   320   31.8 
2026-03-24 00:00 UT   12 25 51.7   -06 28 23     2.613    3.605  173.5    1.8   325   31.8 
2026-03-25 00:00 UT   12 24 54.9   -06 23 53     2.611    3.605  174.5    1.5   332   31.8 
2026-03-26 00:00 UT   12 23 58.0   -06 19 20     2.609    3.604  175.4    1.3   342   31.7 
2026-03-27 00:00 UT   12 23 01.0   -06 14 45     2.607    3.603  176.1    1.1   356   31.7 
2026-03-28 00:00 UT   12 22 04.0   -06 10 08     2.606    3.602  176.5    1.0    14   31.7 
2026-03-29 00:00 UT   12 21 06.9   -06 05 29     2.605    3.602  176.4    1.0    35   31.7 
2026-03-30 00:00 UT   12 20 09.9   -06 00 48     2.604    3.601  176.0    1.1    52   31.7 
2026-03-31 00:00 UT   12 19 13.0   -05 56 06     2.604    3.600  175.3    1.3    65   31.7 
2026-04-01 00:00 UT   12 18 16.2   -05 51 22     2.603    3.599  174.3    1.6    74   31.8 
2026-04-02 00:00 UT   12 17 19.6   -05 46 38     2.604    3.598  173.3    1.8    81   31.8 
2026-04-03 00:00 UT   12 16 23.1   -05 41 53     2.604    3.597  172.3    2.1    86   31.8 
2026-04-04 00:00 UT   12 15 27.0   -05 37 07     2.605    3.596  171.1    2.5    89   31.8 
2026-04-05 00:00 UT   12 14 31.1   -05 32 22     2.606    3.596  170.0    2.8    92   31.9 
2026-04-06 00:00 UT   12 13 35.5   -05 27 36     2.608    3.595  168.8    3.1    95   31.9 
2026-04-07 00:00 UT   12 12 40.3   -05 22 51     2.610    3.594  167.7    3.4    96   31.9 
2026-04-08 00:00 UT   12 11 45.6   -05 18 06     2.612    3.593  166.5    3.7    98   31.9 
2026-04-09 00:00 UT   12 10 51.3   -05 13 23     2.614    3.592  165.3    4.1    99   31.9 
2026-04-10 00:00 UT   12 09 57.5   -05 08 40     2.617    3.591  164.1    4.4   100   32.0 
2026-04-11 00:00 UT   12 09 04.2   -05 03 59     2.620    3.590  162.9    4.7   101   32.0 
2026-04-12 00:00 UT   12 08 11.5   -04 59 19     2.623    3.589  161.7    5.0   102   32.0 
2026-04-13 00:00 UT   12 07 19.4   -04 54 41     2.627    3.588  160.6    5.3   103   32.0 

    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.