2020 RD5
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	15 Dec 2025	29.0	2.286 AU	3.157 AU	15h55m	-15°43'	23.3°	9.8°

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 RD5 are:

            e (Eccentricity)                : 0.5933097
            a (Semimajor axis)              : 1.7158656
            i (Inclination)                 : 7.60870
            Ω (Longitude of ascending node) : 174.89856
            ω (Argument of perihelion)      : 265.75080
            M (Mean anomaly)                : 85.40460
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 260.61176
            B (Latitude of perihelion)      : -7.58766
            P (Orbital period in years)     : 2.25            
        

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
2025-12-15 00:00 UT   15 55 31.6   -15 43 07     3.157    2.286   23.3    9.8   293   29.0 
2025-12-15 06:55 UT   15 56 01.3   -15 44 14     3.157    2.288   23.4    9.8   292   29.0 
2025-12-16 00:00 UT   15 57 14.6   -15 46 59     3.157    2.291   23.8   10.0   292   29.0 
2025-12-17 00:00 UT   15 58 57.4   -15 50 46     3.156    2.296   24.4   10.2   292   29.1 
2025-12-18 00:00 UT   16 00 39.7   -15 54 26     3.154    2.301   25.0   10.4   291   29.1 
2025-12-19 00:00 UT   16 02 21.8   -15 58 01     3.153    2.306   25.6   10.6   291   29.1 
2025-12-20 00:00 UT   16 04 03.4   -16 01 31     3.151    2.310   26.2   10.9   291   29.1 
2025-12-21 00:00 UT   16 05 44.7   -16 04 55     3.150    2.315   26.8   11.1   290   29.1 
2025-12-22 00:00 UT   16 07 25.6   -16 08 13     3.148    2.320   27.4   11.3   290   29.1 
2025-12-23 00:00 UT   16 09 06.1   -16 11 25     3.146    2.324   28.0   11.5   290   29.1 
2025-12-24 00:00 UT   16 10 46.3   -16 14 32     3.144    2.329   28.6   11.7   289   29.1 
2025-12-25 00:00 UT   16 12 26.0   -16 17 33     3.141    2.333   29.3   11.9   289   29.1 
2025-12-26 00:00 UT   16 14 05.3   -16 20 29     3.139    2.338   29.9   12.1   289   29.2 
2025-12-27 00:00 UT   16 15 44.3   -16 23 19     3.136    2.342   30.5   12.3   288   29.2 
2025-12-28 00:00 UT   16 17 22.8   -16 26 03     3.133    2.347   31.1   12.5   288   29.2 
2025-12-29 00:00 UT   16 19 00.9   -16 28 42     3.130    2.351   31.7   12.7   288   29.2 
2025-12-30 00:00 UT   16 20 38.6   -16 31 16     3.127    2.356   32.3   12.9   287   29.2 
2025-12-31 00:00 UT   16 22 15.9   -16 33 44     3.124    2.360   33.0   13.1   287   29.2 
2026-01-01 00:00 UT   16 23 52.8   -16 36 06     3.120    2.365   33.6   13.3   287   29.2 
2026-01-02 00:00 UT   16 25 29.2   -16 38 23     3.116    2.369   34.2   13.5   287   29.2 
2026-01-03 00:00 UT   16 27 05.2   -16 40 35     3.113    2.373   34.8   13.7   286   29.2 
2026-01-04 00:00 UT   16 28 40.7   -16 42 41     3.109    2.378   35.5   13.9   286   29.2 
2026-01-05 00:00 UT   16 30 15.8   -16 44 41     3.105    2.382   36.1   14.1   286   29.2 

    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.