2011 BW11
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	13 Sep 2026	34.6	3.334 AU	4.108 AU	13h30m	-10°48'	35.0°	10.0°

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 2011 BW11 are:

            e (Eccentricity)                : 0.7526066
            a (Semimajor axis)              : 1.9881299
            i (Inclination)                 : 1.55901
            Ω (Longitude of ascending node) : 301.22800
            ω (Argument of perihelion)      : 83.78007
            M (Mean anomaly)                : 190.93033
            Epoch                           : 2026 Jun 09

            L (Longitude of perihelion)     : 25.00578
            B (Latitude of perihelion)      : 1.54983
            P (Orbital period in years)     : 2.80            
        

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
2026-09-13 00:00 UT   13 30 21.7   -10 48 49     4.108    3.334   35.0   10.0   113   34.6 
2026-09-13 06:02 UT   13 30 36.5   -10 50 12     4.110    3.334   34.9    9.9   113   34.6 
2026-09-14 00:00 UT   13 31 20.7   -10 54 20     4.114    3.332   34.3    9.8   113   34.6 
2026-09-15 00:00 UT   13 32 20.0   -10 59 52     4.120    3.330   33.6    9.6   113   34.6 
2026-09-16 00:00 UT   13 33 19.7   -11 05 26     4.126    3.327   32.9    9.4   113   34.6 
2026-09-17 00:00 UT   13 34 19.7   -11 11 02     4.132    3.325   32.2    9.3   113   34.6 
2026-09-18 00:00 UT   13 35 20.0   -11 16 39     4.138    3.322   31.5    9.1   113   34.6 
2026-09-19 00:00 UT   13 36 20.7   -11 22 16     4.143    3.320   30.8    8.9   113   34.6 
2026-09-20 00:00 UT   13 37 21.8   -11 27 56     4.148    3.317   30.1    8.7   113   34.6 
2026-09-21 00:00 UT   13 38 23.1   -11 33 36     4.153    3.315   29.4    8.5   113   34.6 
2026-09-22 00:00 UT   13 39 24.8   -11 39 17     4.158    3.312   28.6    8.4   113   34.6 
2026-09-23 00:00 UT   13 40 26.8   -11 44 60     4.163    3.310   27.9    8.2   113   34.6 
2026-09-24 00:00 UT   13 41 29.2   -11 50 44     4.167    3.307   27.2    8.0   113   34.6 
2026-09-25 00:00 UT   13 42 31.8   -11 56 28     4.171    3.304   26.5    7.8   113   34.6 
2026-09-26 00:00 UT   13 43 34.7   -12 02 14     4.175    3.302   25.8    7.6   114   34.5 
2026-09-27 00:00 UT   13 44 38.0   -12 07 60     4.179    3.299   25.1    7.4   114   34.5 
2026-09-28 00:00 UT   13 45 41.6   -12 13 47     4.183    3.296   24.4    7.2   114   34.5 
2026-09-29 00:00 UT   13 46 45.4   -12 19 35     4.186    3.294   23.7    7.0   114   34.5 
2026-09-30 00:00 UT   13 47 49.6   -12 25 24     4.190    3.291   23.0    6.8   114   34.5 
2026-10-01 00:00 UT   13 48 54.1   -12 31 14     4.193    3.288   22.3    6.6   114   34.5 
2026-10-02 00:00 UT   13 49 58.8   -12 37 04     4.196    3.286   21.6    6.4   114   34.5 
2026-10-03 00:00 UT   13 51 03.9   -12 42 55     4.198    3.283   20.9    6.2   114   34.5 
2026-10-04 00:00 UT   13 52 09.2   -12 48 47     4.201    3.280   20.2    6.0   114   34.5 
2026-10-05 00:00 UT   13 53 14.8   -12 54 39     4.203    3.277   19.5    5.8   114   34.5 
2026-10-06 00:00 UT   13 54 20.7   -13 00 32     4.205    3.274   18.8    5.6   114   34.4 
2026-10-07 00:00 UT   13 55 26.9   -13 06 25     4.207    3.271   18.1    5.4   114   34.4 
2026-10-08 00:00 UT   13 56 33.4   -13 12 19     4.208    3.269   17.4    5.2   114   34.4 
2026-10-09 00:00 UT   13 57 40.1   -13 18 13     4.210    3.266   16.7    5.0   114   34.4 
2026-10-10 00:00 UT   13 58 47.2   -13 24 07     4.211    3.263   16.0    4.8   114   34.4 
2026-10-11 00:00 UT   13 59 54.4   -13 30 02     4.212    3.260   15.3    4.6   115   34.4 
2026-10-12 00:00 UT   14 01 02.0   -13 35 57     4.213    3.257   14.6    4.4   115   34.4 
2026-10-13 00:00 UT   14 02 09.7   -13 41 53     4.214    3.254   13.9    4.2   115   34.4 

    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.