2020 BW5
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	15 Dec 2025	27.5	1.520 AU	0.638 AU	02h34m	+15°45'	138.2°	25.5°

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 2020 BW5 are:

            e (Eccentricity)                : 0.3444179
            a (Semimajor axis)              : 1.3295953
            i (Inclination)                 : 0.51331
            Ω (Longitude of ascending node) : 276.92466
            ω (Argument of perihelion)      : 281.49230
            M (Mean anomaly)                : 247.87347
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 198.41741
            B (Latitude of perihelion)      : -0.50302
            P (Orbital period in years)     : 1.53            
        

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   02 34 04.3   +15 45 49     0.638    1.520  138.2   25.5    73   27.5 
2025-12-15 14:21 UT   02 33 18.6   +15 41 44     0.639    1.518  137.4   26.0    72   27.5 
2025-12-16 00:00 UT   02 32 48.7   +15 39 02     0.640    1.516  136.9   26.3    72   27.5 
2025-12-17 00:00 UT   02 31 37.1   +15 32 32     0.643    1.512  135.6   27.1    72   27.6 
2025-12-18 00:00 UT   02 30 29.5   +15 26 19     0.646    1.508  134.3   27.9    72   27.6 
2025-12-19 00:00 UT   02 29 25.9   +15 20 24     0.650    1.504  133.0   28.6    72   27.6 
2025-12-20 00:00 UT   02 28 26.4   +15 14 47     0.653    1.500  131.7   29.3    72   27.6 
2025-12-21 00:00 UT   02 27 31.0   +15 09 28     0.656    1.495  130.5   30.0    72   27.7 
2025-12-22 00:00 UT   02 26 39.6   +15 04 29     0.660    1.491  129.2   30.7    72   27.7 
2025-12-23 00:00 UT   02 25 52.2   +14 59 48     0.663    1.487  128.0   31.4    72   27.7 
2025-12-24 00:00 UT   02 25 08.9   +14 55 27     0.667    1.483  126.8   32.1    72   27.7 
2025-12-25 00:00 UT   02 24 29.6   +14 51 25     0.671    1.478  125.6   32.8    72   27.8 
2025-12-26 00:00 UT   02 23 54.4   +14 47 42     0.674    1.474  124.4   33.4    72   27.8 
2025-12-27 00:00 UT   02 23 23.1   +14 44 19     0.678    1.469  123.3   34.0    72   27.8 
2025-12-28 00:00 UT   02 22 55.7   +14 41 15     0.682    1.465  122.1   34.6    71   27.8 
2025-12-29 00:00 UT   02 22 32.2   +14 38 31     0.686    1.460  121.0   35.3    71   27.9 
2025-12-30 00:00 UT   02 22 12.6   +14 36 06     0.690    1.456  119.9   35.8    71   27.9 
2025-12-31 00:00 UT   02 21 56.8   +14 33 59     0.694    1.451  118.8   36.4    71   27.9 
2026-01-01 00:00 UT   02 21 44.7   +14 32 12     0.698    1.447  117.7   37.0    71   27.9 
2026-01-02 00:00 UT   02 21 36.3   +14 30 43     0.702    1.442  116.7   37.5    71   28.0 
2026-01-03 00:00 UT   02 21 31.5   +14 29 32     0.707    1.438  115.6   38.1    71   28.0 
2026-01-04 00:00 UT   02 21 30.3   +14 28 40     0.711    1.433  114.6   38.6    71   28.0 
2026-01-05 00:00 UT   02 21 32.6   +14 28 05     0.715    1.428  113.6   39.1    71   28.0 
2026-01-06 00:00 UT   02 21 38.4   +14 27 49     0.719    1.424  112.6   39.6    71   28.0 
2026-01-07 00:00 UT   02 21 47.7   +14 27 49     0.723    1.419  111.6   40.1    71   28.1 
2026-01-08 00:00 UT   02 22 00.3   +14 28 07     0.727    1.414  110.6   40.6    71   28.1 
2026-01-09 00:00 UT   02 22 16.2   +14 28 41     0.732    1.410  109.7   41.1    71   28.1 
2026-01-10 00:00 UT   02 22 35.4   +14 29 32     0.736    1.405  108.7   41.5    71   28.1 
2026-01-11 00:00 UT   02 22 57.8   +14 30 40     0.740    1.400  107.8   42.0    71   28.1 
2026-01-12 00:00 UT   02 23 23.5   +14 32 03     0.744    1.395  106.9   42.4    71   28.1 
2026-01-13 00:00 UT   02 23 52.3   +14 33 43     0.748    1.390  106.0   42.8    71   28.2 
2026-01-14 00:00 UT   02 24 24.1   +14 35 37     0.752    1.385  105.1   43.3    71   28.2 

    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.