2021 CU3
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	4 Nov 2026	29.1	4.287 AU	3.467 AU	05h00m	+00°49'	141.4°	8.3°

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 CU3 are:

            e (Eccentricity)                : 0.7812176
            a (Semimajor axis)              : 2.4068260
            i (Inclination)                 : 17.83354
            Ω (Longitude of ascending node) : 144.41233
            ω (Argument of perihelion)      : 101.88470
            M (Mean anomaly)                : 138.67312
            Epoch                           : 2026 Jun 09

            L (Longitude of perihelion)     : 66.87859
            B (Latitude of perihelion)      : 17.43885
            P (Orbital period in years)     : 3.73            
        

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
2026-11-04 00:00 UT   05 00 29.8   +00 49 44     3.467    4.287  141.4    8.3   294   29.1 
2026-11-04 08:05 UT   05 00 15.7   +00 48 22     3.464    4.287  141.7    8.3   294   29.1 
2026-11-05 00:00 UT   04 59 47.7   +00 45 40     3.459    4.287  142.3    8.1   295   29.1 
2026-11-06 00:00 UT   04 59 04.7   +00 41 38     3.451    4.287  143.2    8.0   296   29.1 
2026-11-07 00:00 UT   04 58 20.9   +00 37 41     3.444    4.287  144.1    7.8   297   29.0 
2026-11-08 00:00 UT   04 57 36.3   +00 33 47     3.437    4.287  145.0    7.6   299   29.0 
2026-11-09 00:00 UT   04 56 51.0   +00 29 57     3.430    4.287  145.9    7.4   300   29.0 
2026-11-10 00:00 UT   04 56 04.8   +00 26 11     3.424    4.287  146.8    7.3   301   29.0 
2026-11-11 00:00 UT   04 55 17.9   +00 22 30     3.418    4.287  147.6    7.1   303   29.0 
2026-11-12 00:00 UT   04 54 30.4   +00 18 53     3.412    4.287  148.5    6.9   305   29.0 
2026-11-13 00:00 UT   04 53 42.1   +00 15 20     3.406    4.287  149.3    6.8   306   29.0 
2026-11-14 00:00 UT   04 52 53.2   +00 11 53     3.401    4.287  150.1    6.6   308   29.0 
2026-11-15 00:00 UT   04 52 03.7   +00 08 30     3.396    4.287  150.9    6.5   310   29.0 
2026-11-16 00:00 UT   04 51 13.6   +00 05 13     3.391    4.287  151.6    6.3   312   28.9 
2026-11-17 00:00 UT   04 50 22.9   +00 02 01     3.387    4.287  152.3    6.2   314   28.9 
2026-11-18 00:00 UT   04 49 31.7   +00 01 06     3.382    4.287  153.0    6.0   316   28.9 
2026-11-19 00:00 UT   04 48 40.0   +00 04 07     3.379    4.287  153.7    5.9   318   28.9 
2026-11-20 00:00 UT   04 47 47.8   +00 07 03     3.375    4.287  154.3    5.7   321   28.9 
2026-11-21 00:00 UT   04 46 55.2   +00 09 53     3.372    4.287  154.8    5.6   323   28.9 
2026-11-22 00:00 UT   04 46 02.2   +00 12 37     3.369    4.287  155.4    5.5   326   28.9 
2026-11-23 00:00 UT   04 45 08.8   +00 15 14     3.366    4.286  155.8    5.4   329   28.9 
2026-11-24 00:00 UT   04 44 15.1   +00 17 46     3.364    4.286  156.3    5.3   331   28.9 
2026-11-25 00:00 UT   04 43 21.1   +00 20 11     3.362    4.286  156.6    5.2   334   28.9 
2026-11-26 00:00 UT   04 42 26.8   +00 22 30     3.360    4.286  156.9    5.2   337   28.9 
2026-11-27 00:00 UT   04 41 32.3   +00 24 42     3.359    4.286  157.2    5.1   340   28.9 
2026-11-28 00:00 UT   04 40 37.5   +00 26 48     3.358    4.286  157.4    5.1   344   28.9 
2026-11-29 00:00 UT   04 39 42.7   +00 28 47     3.357    4.285  157.5    5.0   347   28.9 
2026-11-30 00:00 UT   04 38 47.6   +00 30 39     3.357    4.285  157.6    5.0   350   28.9 
2026-12-01 00:00 UT   04 37 52.5   +00 32 25     3.357    4.285  157.6    5.0   353   28.9 
2026-12-02 00:00 UT   04 36 57.3   +00 34 03     3.357    4.285  157.5    5.0   356   28.9 
2026-12-03 00:00 UT   04 36 02.1   +00 35 34     3.358    4.284  157.4    5.1   360   28.9 
2026-12-04 00:00 UT   04 35 07.0   +00 36 58     3.358    4.284  157.2    5.1     3   28.9 

    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.