2021 CR3
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	19 Dec 2025	23.7	1.483 AU	0.600 AU	03h31m	-03°14'	137.6°	26.6°

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 CR3 are:

            e (Eccentricity)                : 0.6420724
            a (Semimajor axis)              : 1.0626227
            i (Inclination)                 : 8.80864
            Ω (Longitude of ascending node) : 150.18466
            ω (Argument of perihelion)      : 128.87393
            M (Mean anomaly)                : 73.90643
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 99.39116
            B (Latitude of perihelion)      : 6.84708
            P (Orbital period in years)     : 1.10            
        

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
2025-12-19 00:00 UT   03 31 11.1   -03 14 56     0.600    1.483  137.6   26.6    49   23.7 
2025-12-19 18:35 UT   03 30 02.6   -03 01 04     0.609    1.488  136.8   26.9    50   23.8 
2025-12-20 00:00 UT   03 29 43.3   -02 57 03     0.612    1.489  136.6   27.0    51   23.8 
2025-12-21 00:00 UT   03 28 21.5   -02 39 20     0.624    1.495  135.7   27.4    52   23.9 
2025-12-22 00:00 UT   03 27 05.4   -02 21 46     0.636    1.501  134.7   27.8    53   23.9 
2025-12-23 00:00 UT   03 25 54.9   -02 04 21     0.648    1.507  133.8   28.1    54   24.0 
2025-12-24 00:00 UT   03 24 49.8   -01 47 06     0.661    1.513  132.8   28.5    55   24.1 
2025-12-25 00:00 UT   03 23 49.8   -01 30 01     0.673    1.518  131.8   28.9    56   24.1 
2025-12-26 00:00 UT   03 22 54.9   -01 13 05     0.686    1.524  130.9   29.2    57   24.2 
2025-12-27 00:00 UT   03 22 04.8   +00 56 19     0.699    1.529  129.9   29.5    58   24.2 
2025-12-28 00:00 UT   03 21 19.4   +00 39 43     0.712    1.535  129.0   29.9    59   24.3 
2025-12-29 00:00 UT   03 20 38.5   +00 23 17     0.725    1.540  128.1   30.2    60   24.3 
2025-12-30 00:00 UT   03 20 01.9   +00 06 60     0.738    1.545  127.1   30.5    60   24.4 
2025-12-31 00:00 UT   03 19 29.4   +00 09 07     0.751    1.550  126.2   30.8    61   24.5 
2026-01-01 00:00 UT   03 19 01.0   +00 25 04     0.764    1.555  125.3   31.1    62   24.5 
2026-01-02 00:00 UT   03 18 36.5   +00 40 52     0.778    1.560  124.4   31.3    62   24.6 
2026-01-03 00:00 UT   03 18 15.6   +00 56 31     0.791    1.565  123.4   31.6    63   24.6 
2026-01-04 00:00 UT   03 17 58.4   +01 11 60     0.805    1.570  122.5   31.9    64   24.7 
2026-01-05 00:00 UT   03 17 44.7   +01 27 20     0.818    1.575  121.6   32.1    64   24.7 
2026-01-06 00:00 UT   03 17 34.3   +01 42 30     0.832    1.580  120.8   32.3    65   24.8 
2026-01-07 00:00 UT   03 17 27.1   +01 57 33     0.846    1.584  119.9   32.6    65   24.8 
2026-01-08 00:00 UT   03 17 23.1   +02 12 26     0.860    1.589  119.0   32.8    66   24.9 
2026-01-09 00:00 UT   03 17 22.1   +02 27 11     0.874    1.594  118.1   33.0    66   24.9 
2026-01-10 00:00 UT   03 17 24.1   +02 41 47     0.887    1.598  117.2   33.2    67   24.9 
2026-01-11 00:00 UT   03 17 28.9   +02 56 16     0.902    1.602  116.4   33.4    67   25.0 
2026-01-12 00:00 UT   03 17 36.5   +03 10 36     0.916    1.607  115.5   33.5    67   25.0 
2026-01-13 00:00 UT   03 17 46.7   +03 24 49     0.930    1.611  114.7   33.7    68   25.1 
2026-01-14 00:00 UT   03 17 59.5   +03 38 53     0.944    1.615  113.8   33.9    68   25.1 
2026-01-15 00:00 UT   03 18 14.9   +03 52 50     0.958    1.619  113.0   34.0    69   25.2 
2026-01-16 00:00 UT   03 18 32.7   +04 06 40     0.972    1.623  112.2   34.1    69   25.2 
2026-01-17 00:00 UT   03 18 52.9   +04 20 22     0.987    1.627  111.3   34.3    69   25.2 
2026-01-18 00:00 UT   03 19 15.4   +04 33 57     1.001    1.631  110.5   34.4    70   25.3 

    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.