2021 RL3
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	19 Oct 2025	29.8	3.086 AU	3.863 AU	15h52m	-11°36'	33.8°	10.4°

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 2021 RL3 are:

            e (Eccentricity)                : 0.7488818
            a (Semimajor axis)              : 2.1512636
            i (Inclination)                 : 10.98160
            Ω (Longitude of ascending node) : 175.20983
            ω (Argument of perihelion)      : 275.85251
            M (Mean anomaly)                : 38.33134
            Epoch                           : 2025 May 05

            L (Longitude of perihelion)     : 91.17073
            B (Latitude of perihelion)      : -10.92365
            P (Orbital period in years)     : 3.16            
        

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
2025-10-19 00:00 UT   15 52 10.3   -11 36 06     3.863    3.086   33.8   10.4    90   29.8 
2025-10-19 02:42 UT   15 52 18.5   -11 36 37     3.864    3.086   33.8   10.3    90   29.8 
2025-10-20 00:00 UT   15 53 23.8   -11 40 38     3.876    3.091   33.2   10.2    89   29.8 
2025-10-21 00:00 UT   15 54 37.4   -11 45 07     3.889    3.096   32.5   10.0    89   29.8 
2025-10-22 00:00 UT   15 55 51.2   -11 49 33     3.901    3.101   31.8    9.8    88   29.8 
2025-10-23 00:00 UT   15 57 05.1   -11 53 56     3.913    3.105   31.2    9.6    88   29.8 
2025-10-24 00:00 UT   15 58 19.1   -11 58 15     3.926    3.110   30.5    9.4    87   29.8 
2025-10-25 00:00 UT   15 59 33.3   -12 02 32     3.938    3.115   29.9    9.2    87   29.8 
2025-10-26 00:00 UT   16 00 47.5   -12 06 45     3.950    3.120   29.2    9.0    86   29.8 
2025-10-27 00:00 UT   16 02 01.8   -12 10 55     3.961    3.125   28.6    8.7    86   29.8 
2025-10-28 00:00 UT   16 03 16.2   -12 15 02     3.973    3.130   27.9    8.5    85   29.8 
2025-10-29 00:00 UT   16 04 30.7   -12 19 05     3.984    3.134   27.3    8.3    85   29.8 
2025-10-30 00:00 UT   16 05 45.3   -12 23 05     3.995    3.139   26.6    8.1    84   29.8 
2025-10-31 00:00 UT   16 06 60.0   -12 27 02     4.006    3.144   26.0    7.9    84   29.8 
2025-11-01 00:00 UT   16 08 14.7   -12 30 55     4.017    3.149   25.3    7.7    83   29.8 
2025-11-02 00:00 UT   16 09 29.5   -12 34 46     4.028    3.153   24.7    7.5    82   29.8 
2025-11-03 00:00 UT   16 10 44.3   -12 38 32     4.038    3.158   24.0    7.3    82   29.8 
2025-11-04 00:00 UT   16 11 59.2   -12 42 16     4.048    3.163   23.4    7.1    81   29.8 
2025-11-05 00:00 UT   16 13 14.2   -12 45 56     4.059    3.167   22.7    7.0    80   29.8 
2025-11-06 00:00 UT   16 14 29.2   -12 49 33     4.068    3.172   22.1    6.8    79   29.8 
2025-11-07 00:00 UT   16 15 44.3   -12 53 06     4.078    3.177   21.5    6.6    79   29.8 
2025-11-08 00:00 UT   16 16 59.4   -12 56 36     4.088    3.181   20.8    6.4    78   29.8 
2025-11-09 00:00 UT   16 18 14.5   -13 00 03     4.097    3.186   20.2    6.2    77   29.8 
2025-11-10 00:00 UT   16 19 29.7   -13 03 26     4.106    3.190   19.6    6.0    76   29.8 
2025-11-11 00:00 UT   16 20 44.9   -13 06 46     4.115    3.195   18.9    5.8    75   29.8 
2025-11-12 00:00 UT   16 22 00.1   -13 10 02     4.124    3.199   18.3    5.6    74   29.8 
2025-11-13 00:00 UT   16 23 15.4   -13 13 15     4.132    3.204   17.7    5.4    73   29.8 
2025-11-14 00:00 UT   16 24 30.7   -13 16 24     4.141    3.208   17.1    5.2    71   29.8 
2025-11-15 00:00 UT   16 25 46.0   -13 19 30     4.149    3.213   16.5    5.0    70   29.8 

    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.