(4660) Nereus
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	12 Apr 2026	22.6	1.895 AU	1.695 AU	19h55m	-22°01'	85.1°	31.8°

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 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
2026-04-12 00:00 UT   19 55 31.2   -22 01 33     1.695    1.895   85.1   31.8   259   22.6 
2026-04-12 12:43 UT   19 56 12.8   -21 59 44     1.690    1.896   85.5   31.8   259   22.6 
2026-04-13 00:00 UT   19 56 49.5   -21 58 08     1.686    1.897   85.8   31.8   259   22.6 
2026-04-14 00:00 UT   19 58 06.4   -21 54 44     1.676    1.900   86.5   31.8   259   22.6 
2026-04-15 00:00 UT   19 59 22.0   -21 51 22     1.667    1.902   87.2   31.8   259   22.6 
2026-04-16 00:00 UT   20 00 36.1   -21 48 02     1.657    1.905   87.9   31.8   258   22.6 
2026-04-17 00:00 UT   20 01 48.9   -21 44 44     1.647    1.907   88.5   31.7   258   22.6 
2026-04-18 00:00 UT   20 03 00.2   -21 41 28     1.638    1.910   89.2   31.7   258   22.6 
2026-04-19 00:00 UT   20 04 10.1   -21 38 14     1.628    1.912   89.9   31.7   258   22.6 
2026-04-20 00:00 UT   20 05 18.5   -21 35 03     1.618    1.914   90.6   31.6   258   22.6 
2026-04-21 00:00 UT   20 06 25.5   -21 31 54     1.608    1.917   91.4   31.6   258   22.5 
2026-04-22 00:00 UT   20 07 30.9   -21 28 48     1.599    1.919   92.1   31.6   258   22.5 
2026-04-23 00:00 UT   20 08 34.8   -21 25 45     1.589    1.921   92.8   31.5   258   22.5 
2026-04-24 00:00 UT   20 09 37.1   -21 22 46     1.579    1.923   93.5   31.5   258   22.5 
2026-04-25 00:00 UT   20 10 37.9   -21 19 49     1.569    1.926   94.3   31.4   258   22.5 
2026-04-26 00:00 UT   20 11 37.2   -21 16 56     1.559    1.928   95.0   31.3   258   22.5 
2026-04-27 00:00 UT   20 12 34.8   -21 14 07     1.549    1.930   95.7   31.3   258   22.5 
2026-04-28 00:00 UT   20 13 30.8   -21 11 21     1.539    1.932   96.5   31.2   258   22.5 
2026-04-29 00:00 UT   20 14 25.2   -21 08 40     1.529    1.934   97.2   31.1   257   22.4 
2026-04-30 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 

    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.