2020 BC9
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	15 Dec 2025	29.7	3.460 AU	3.800 AU	21h51m	-13°06'	62.7°	14.6°

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 2020 BC9 are:

            e (Eccentricity)                : 0.5668419
            a (Semimajor axis)              : 2.3338634
            i (Inclination)                 : 10.30820
            Ω (Longitude of ascending node) : 159.55991
            ω (Argument of perihelion)      : 343.68672
            M (Mean anomaly)                : 222.05500
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 143.49625
            B (Latitude of perihelion)      : -2.88108
            P (Orbital period in years)     : 3.57            
        

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
2025-12-15 00:00 UT   21 51 23.7   -13 06 04     3.800    3.460   62.7   14.6    70   29.7 
2025-12-15 08:28 UT   21 51 40.9   -13 04 56     3.804    3.459   62.4   14.6    70   29.7 
2025-12-16 00:00 UT   21 52 12.6   -13 02 51     3.812    3.458   61.8   14.5    70   29.7 
2025-12-17 00:00 UT   21 53 02.1   -12 59 34     3.823    3.456   61.0   14.4    70   29.7 
2025-12-18 00:00 UT   21 53 52.2   -12 56 12     3.835    3.453   60.2   14.3    70   29.7 
2025-12-19 00:00 UT   21 54 42.8   -12 52 47     3.846    3.451   59.4   14.2    70   29.7 
2025-12-20 00:00 UT   21 55 34.0   -12 49 18     3.857    3.449   58.6   14.1    70   29.7 
2025-12-21 00:00 UT   21 56 25.8   -12 45 44     3.868    3.446   57.8   14.0    70   29.7 
2025-12-22 00:00 UT   21 57 18.2   -12 42 06     3.879    3.444   57.0   13.9    70   29.7 
2025-12-23 00:00 UT   21 58 11.0   -12 38 25     3.890    3.442   56.2   13.7    70   29.7 
2025-12-24 00:00 UT   21 59 04.5   -12 34 39     3.901    3.439   55.4   13.6    70   29.7 
2025-12-25 00:00 UT   21 59 58.4   -12 30 50     3.911    3.437   54.6   13.5    70   29.7 
2025-12-26 00:00 UT   22 00 52.8   -12 26 57     3.922    3.434   53.9   13.4    70   29.7 
2025-12-27 00:00 UT   22 01 47.7   -12 22 60     3.932    3.432   53.1   13.2    70   29.7 
2025-12-28 00:00 UT   22 02 43.2   -12 18 59     3.942    3.430   52.3   13.1    70   29.7 
2025-12-29 00:00 UT   22 03 39.1   -12 14 55     3.952    3.427   51.5   13.0    70   29.7 
2025-12-30 00:00 UT   22 04 35.4   -12 10 47     3.962    3.425   50.7   12.8    70   29.7 
2025-12-31 00:00 UT   22 05 32.2   -12 06 35     3.971    3.422   49.9   12.7    70   29.7 
2026-01-01 00:00 UT   22 06 29.5   -12 02 20     3.981    3.420   49.2   12.6    70   29.7 
2026-01-02 00:00 UT   22 07 27.2   -11 58 02     3.990    3.417   48.4   12.4    70   29.7 
2026-01-03 00:00 UT   22 08 25.3   -11 53 39     3.999    3.415   47.6   12.3    70   29.7 
2026-01-04 00:00 UT   22 09 23.9   -11 49 14     4.008    3.412   46.9   12.1    70   29.7 
2026-01-05 00:00 UT   22 10 22.9   -11 44 45     4.017    3.410   46.1   12.0    70   29.7 
2026-01-06 00:00 UT   22 11 22.3   -11 40 13     4.026    3.407   45.3   11.8    70   29.7 
2026-01-07 00:00 UT   22 12 22.1   -11 35 37     4.035    3.405   44.6   11.7    70   29.7 
2026-01-08 00:00 UT   22 13 22.3   -11 30 58     4.043    3.402   43.8   11.5    70   29.7 
2026-01-09 00:00 UT   22 14 22.9   -11 26 15     4.051    3.399   43.0   11.4    70   29.7 
2026-01-10 00:00 UT   22 15 23.9   -11 21 30     4.059    3.397   42.3   11.2    70   29.7 
2026-01-11 00:00 UT   22 16 25.2   -11 16 41     4.067    3.394   41.5   11.1    70   29.7 
2026-01-12 00:00 UT   22 17 26.9   -11 11 49     4.075    3.392   40.8   10.9    70   29.7 
2026-01-13 00:00 UT   22 18 29.0   -11 06 54     4.083    3.389   40.0   10.8    70   29.7 
2026-01-14 00:00 UT   22 19 31.5   -11 01 56     4.090    3.386   39.3   10.6    70   29.7 

    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.