2009 BG81
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	23 Mar 2026	30.9	1.401 AU	1.323 AU	19h21m	-19°14'	72.8°	42.8°

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 2009 BG81 are:

            e (Eccentricity)                : 0.4597177
            a (Semimajor axis)              : 1.7952137
            i (Inclination)                 : 3.05071
            Ω (Longitude of ascending node) : 128.24596
            ω (Argument of perihelion)      : 29.35556
            M (Mean anomaly)                : 348.36487
            Epoch                           : 2025 Nov 21

            L (Longitude of perihelion)     : 157.56681
            B (Latitude of perihelion)      : 1.49501
            P (Orbital period in years)     : 2.41            
        

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
2026-03-23 00:00 UT   19 21 27.2   -19 14 25     1.323    1.401   72.8   42.8   263   30.9 
2026-03-23 12:15 UT   19 22 31.2   -19 12 15     1.322    1.405   73.1   42.7   263   30.9 
2026-03-24 00:00 UT   19 23 32.2   -19 10 10     1.321    1.408   73.3   42.7   263   30.9 
2026-03-25 00:00 UT   19 25 35.4   -19 05 53     1.319    1.415   73.8   42.6   262   30.9 
2026-03-26 00:00 UT   19 27 36.7   -19 01 35     1.317    1.421   74.3   42.5   262   30.9 
2026-03-27 00:00 UT   19 29 36.3   -18 57 15     1.315    1.428   74.8   42.4   262   30.9 
2026-03-28 00:00 UT   19 31 34.0   -18 52 53     1.313    1.435   75.4   42.3   262   30.9 
2026-03-29 00:00 UT   19 33 29.9   -18 48 30     1.311    1.441   75.9   42.2   262   30.9 
2026-03-30 00:00 UT   19 35 24.0   -18 44 07     1.309    1.448   76.4   42.1   261   30.9 
2026-03-31 00:00 UT   19 37 16.3   -18 39 42     1.307    1.455   76.9   42.0   261   30.9 
2026-04-01 00:00 UT   19 39 06.8   -18 35 18     1.304    1.461   77.5   41.9   261   30.9 
2026-04-02 00:00 UT   19 40 55.4   -18 30 53     1.302    1.468   78.0   41.8   261   30.9 
2026-04-03 00:00 UT   19 42 42.2   -18 26 28     1.299    1.475   78.6   41.7   261   30.9 
2026-04-04 00:00 UT   19 44 27.1   -18 22 04     1.297    1.481   79.2   41.5   260   30.9 
2026-04-05 00:00 UT   19 46 10.2   -18 17 40     1.294    1.488   79.7   41.4   260   30.9 
2026-04-06 00:00 UT   19 47 51.4   -18 13 18     1.291    1.494   80.3   41.3   260   30.9 
2026-04-07 00:00 UT   19 49 30.7   -18 08 56     1.288    1.501   80.9   41.2   260   30.9 
2026-04-08 00:00 UT   19 51 08.2   -18 04 36     1.285    1.508   81.5   41.1   260   30.9 
2026-04-09 00:00 UT   19 52 43.7   -18 00 17     1.282    1.514   82.1   40.9   260   30.9 
2026-04-10 00:00 UT   19 54 17.4   -17 56 00     1.279    1.521   82.7   40.8   259   30.9 
2026-04-11 00:00 UT   19 55 49.1   -17 51 45     1.276    1.527   83.3   40.7   259   30.9 

    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.