(4660) Nereus
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	29 Mar 2026	22.7	1.857 AU	1.823 AU	19h35m	-22°50'	76.1°	31.5°

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
2026-03-29 00:00 UT   19 35 03.1   -22 50 16     1.823    1.857   76.1   31.5   260   22.7 
2026-03-29 10:45 UT   19 35 46.0   -22 48 44     1.819    1.858   76.4   31.5   260   22.7 
2026-03-30 00:00 UT   19 36 38.6   -22 46 49     1.814    1.860   76.8   31.5   260   22.7 
2026-03-31 00:00 UT   19 38 12.9   -22 43 21     1.805    1.863   77.4   31.6   260   22.7 
2026-04-01 00:00 UT   19 39 46.0   -22 39 52     1.796    1.865   78.0   31.6   260   22.7 
2026-04-02 00:00 UT   19 41 18.0   -22 36 23     1.788    1.868   78.6   31.6   260   22.7 
2026-04-03 00:00 UT   19 42 48.8   -22 32 53     1.779    1.871   79.3   31.7   260   22.7 
2026-04-04 00:00 UT   19 44 18.5   -22 29 23     1.770    1.874   79.9   31.7   260   22.7 
2026-04-05 00:00 UT   19 45 46.9   -22 25 53     1.760    1.876   80.5   31.7   260   22.7 
2026-04-06 00:00 UT   19 47 14.1   -22 22 23     1.751    1.879   81.2   31.7   259   22.7 
2026-04-07 00:00 UT   19 48 40.1   -22 18 53     1.742    1.882   81.8   31.8   259   22.7 
2026-04-08 00:00 UT   19 50 04.9   -22 15 24     1.733    1.885   82.5   31.8   259   22.7 
2026-04-09 00:00 UT   19 51 28.4   -22 11 55     1.724    1.887   83.1   31.8   259   22.7 
2026-04-10 00:00 UT   19 52 50.6   -22 08 27     1.714    1.890   83.8   31.8   259   22.7 
2026-04-11 00:00 UT   19 54 11.5   -22 04 59     1.705    1.892   84.5   31.8   259   22.6 
2026-04-12 00:00 UT   19 55 31.2   -22 01 33     1.695    1.895   85.1   31.8   259   22.6 
2026-04-13 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 

    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.