2021 CQ4
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	30 Oct 2026	31.7	3.228 AU	3.529 AU	18h47m	-24°31'	64.5°	16.1°

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 2021 CQ4 are:

            e (Eccentricity)                : 0.6298097
            a (Semimajor axis)              : 2.8399609
            i (Inclination)                 : 2.01820
            Ω (Longitude of ascending node) : 352.40401
            ω (Argument of perihelion)      : 166.22696
            M (Mean anomaly)                : 37.86993
            Epoch                           : 2026 Jun 09

            L (Longitude of perihelion)     : 338.63919
            B (Latitude of perihelion)      : 0.48039
            P (Orbital period in years)     : 4.79            
        

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
2026-10-30 00:00 UT   18 47 01.1   -24 31 37     3.529    3.228   64.5   16.1    86   31.7 
2026-10-30 01:32 UT   18 47 05.4   -24 31 31     3.530    3.229   64.4   16.1    86   31.7 
2026-10-31 00:00 UT   18 48 09.1   -24 29 53     3.548    3.234   63.7   16.0    86   31.7 
2026-11-01 00:00 UT   18 49 17.4   -24 28 07     3.567    3.239   63.0   15.8    86   31.7 
2026-11-02 00:00 UT   18 50 26.1   -24 26 19     3.585    3.245   62.3   15.7    86   31.7 
2026-11-03 00:00 UT   18 51 35.2   -24 24 29     3.604    3.250   61.5   15.6    86   31.8 
2026-11-04 00:00 UT   18 52 44.5   -24 22 37     3.622    3.256   60.8   15.4    86   31.8 
2026-11-05 00:00 UT   18 53 54.2   -24 20 43     3.641    3.261   60.1   15.3    86   31.8 
2026-11-06 00:00 UT   18 55 04.2   -24 18 47     3.659    3.267   59.3   15.1    85   31.8 
2026-11-07 00:00 UT   18 56 14.5   -24 16 49     3.677    3.272   58.6   15.0    85   31.8 
2026-11-08 00:00 UT   18 57 25.2   -24 14 49     3.695    3.278   57.9   14.8    85   31.8 
2026-11-09 00:00 UT   18 58 36.1   -24 12 47     3.713    3.283   57.1   14.7    85   31.8 
2026-11-10 00:00 UT   18 59 47.2   -24 10 43     3.731    3.288   56.4   14.5    85   31.8 
2026-11-11 00:00 UT   19 00 58.7   -24 08 37     3.749    3.294   55.7   14.4    85   31.8 
2026-11-12 00:00 UT   19 02 10.4   -24 06 29     3.767    3.299   54.9   14.2    85   31.8 
2026-11-13 00:00 UT   19 03 22.3   -24 04 19     3.784    3.304   54.2   14.1    85   31.8 
2026-11-14 00:00 UT   19 04 34.5   -24 02 07     3.802    3.310   53.5   13.9    85   31.9 
2026-11-15 00:00 UT   19 05 47.0   -23 59 53     3.819    3.315   52.7   13.7    85   31.9 
2026-11-16 00:00 UT   19 06 59.6   -23 57 36     3.836    3.320   52.0   13.6    85   31.9 
2026-11-17 00:00 UT   19 08 12.5   -23 55 18     3.853    3.326   51.3   13.4    84   31.9 
2026-11-18 00:00 UT   19 09 25.5   -23 52 57     3.870    3.331   50.6   13.3    84   31.9 
2026-11-19 00:00 UT   19 10 38.8   -23 50 35     3.887    3.336   49.8   13.1    84   31.9 
2026-11-20 00:00 UT   19 11 52.2   -23 48 10     3.904    3.341   49.1   12.9    84   31.9 
2026-11-21 00:00 UT   19 13 05.8   -23 45 43     3.920    3.347   48.4   12.8    84   31.9 
2026-11-22 00:00 UT   19 14 19.6   -23 43 14     3.937    3.352   47.7   12.6    84   31.9 
2026-11-23 00:00 UT   19 15 33.6   -23 40 42     3.953    3.357   46.9   12.4    84   31.9 
2026-11-24 00:00 UT   19 16 47.7   -23 38 09     3.969    3.362   46.2   12.2    84   31.9 
2026-11-25 00:00 UT   19 18 01.9   -23 35 34     3.985    3.367   45.5   12.1    84   31.9 
2026-11-26 00:00 UT   19 19 16.3   -23 32 56     4.001    3.373   44.8   11.9    84   31.9 
2026-11-27 00:00 UT   19 20 30.8   -23 30 16     4.017    3.378   44.0   11.7    84   31.9 
2026-11-28 00:00 UT   19 21 45.5   -23 27 34     4.032    3.383   43.3   11.5    83   31.9 
2026-11-29 00:00 UT   19 23 00.3   -23 24 50     4.048    3.388   42.6   11.4    83   31.9 

    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.