(4660) Nereus
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	29 Apr 2026	22.4	1.934 AU	1.529 AU	20h14m	-21°08'	97.2°	31.1°

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 Nereus are:

            e (Eccentricity)                : 0.3587883
            a (Semimajor axis)              : 1.4849992
            i (Inclination)                 : 1.45354
            Ω (Longitude of ascending node) : 313.10701
            ω (Argument of perihelion)      : 159.54230
            M (Mean anomaly)                : 49.81687
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 292.65535
            B (Latitude of perihelion)      : 0.50799
            P (Orbital period in years)     : 1.81            
        

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
2026-04-29 00:00 UT   20 14 25.2   -21 08 40     1.529    1.934   97.2   31.1   257   22.4 
2026-04-29 13:28 UT   20 14 55.0   -21 07 11     1.524    1.935   97.7   31.0   257   22.4 
2026-04-30 00:00 UT   20 15 17.9   -21 06 02     1.519    1.936   98.0   31.0   257   22.4 
2026-05-01 00:00 UT   20 16 08.9   -21 03 29     1.509    1.938   98.8   30.9   257   22.4 
2026-05-02 00:00 UT   20 16 58.2   -21 01 00     1.499    1.940   99.6   30.8   257   22.4 
2026-05-03 00:00 UT   20 17 45.8   -20 58 36     1.489    1.942  100.3   30.7   257   22.4 
2026-05-04 00:00 UT   20 18 31.6   -20 56 17     1.479    1.944  101.1   30.6   257   22.4 
2026-05-05 00:00 UT   20 19 15.6   -20 54 02     1.469    1.946  101.9   30.5   257   22.3 
2026-05-06 00:00 UT   20 19 57.8   -20 51 53     1.459    1.948  102.7   30.3   257   22.3 
2026-05-07 00:00 UT   20 20 38.2   -20 49 49     1.450    1.950  103.5   30.2   257   22.3 
2026-05-08 00:00 UT   20 21 16.6   -20 47 51     1.440    1.952  104.3   30.1   257   22.3 
2026-05-09 00:00 UT   20 21 53.2   -20 45 58     1.430    1.954  105.2   29.9   257   22.3 
2026-05-10 00:00 UT   20 22 27.8   -20 44 11     1.420    1.956  106.0   29.8   257   22.3 
2026-05-11 00:00 UT   20 23 00.4   -20 42 30     1.410    1.957  106.8   29.6   257   22.2 
2026-05-12 00:00 UT   20 23 31.1   -20 40 56     1.400    1.959  107.7   29.4   257   22.2 
2026-05-13 00:00 UT   20 23 59.7   -20 39 28     1.390    1.961  108.5   29.2   257   22.2 
2026-05-14 00:00 UT   20 24 26.2   -20 38 06     1.380    1.963  109.4   29.1   257   22.2 
2026-05-15 00:00 UT   20 24 50.6   -20 36 51     1.370    1.964  110.2   28.9   257   22.2 
2026-05-16 00:00 UT   20 25 12.8   -20 35 43     1.361    1.966  111.1   28.7   257   22.1 
2026-05-17 00:00 UT   20 25 32.9   -20 34 42     1.351    1.968  112.0   28.5   257   22.1 
2026-05-18 00:00 UT   20 25 50.8   -20 33 48     1.341    1.969  112.9   28.2   257   22.1 
2026-05-19 00:00 UT   20 26 06.4   -20 33 02     1.332    1.971  113.8   28.0   257   22.1 
2026-05-20 00:00 UT   20 26 19.8   -20 32 22     1.322    1.972  114.7   27.8   257   22.1 
2026-05-21 00:00 UT   20 26 30.9   -20 31 51     1.313    1.974  115.6   27.5   257   22.0 
2026-05-22 00:00 UT   20 26 39.6   -20 31 27     1.303    1.975  116.6   27.3   257   22.0 
2026-05-23 00:00 UT   20 26 46.1   -20 31 10     1.294    1.977  117.5   27.0   257   22.0 
2026-05-24 00:00 UT   20 26 50.1   -20 31 02     1.284    1.978  118.4   26.7   257   22.0 
2026-05-25 00:00 UT   20 26 51.8   -20 31 01     1.275    1.980  119.4   26.5   257   22.0 
2026-05-26 00:00 UT   20 26 51.1   -20 31 08     1.266    1.981  120.4   26.2   257   21.9 
2026-05-27 00:00 UT   20 26 47.9   -20 31 23     1.257    1.982  121.3   25.9   257   21.9 
2026-05-28 00:00 UT   20 26 42.2   -20 31 47     1.248    1.984  122.3   25.6   257   21.9 
2026-05-29 00:00 UT   20 26 34.0   -20 32 18     1.239    1.985  123.3   25.3   257   21.9 

    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.