2015 BZ509
ephemeris	date	magn	radius	delta	ra	dec	elong	phase
Today	29 Mar 2023	24.4	6.824 AU	5.951 AU	14h28m	+05°50'	148.8°	4.4°
Opposition	18 Apr 2023	24.3	6.801 AU	5.847 AU	14h12m	+07°34'	160.4°	2.8°

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 2015 BZ509 are:

            e (Eccentricity)                : 0.3805428
            a (Semimajor axis)              : 5.1374609
            i (Inclination)                 : 163.00058
            Ω (Longitude of ascending node) : 307.38024
            ω (Argument of perihelion)      : 257.38028
            M (Mean anomaly)                : 66.37535
            Epoch                           : 2018 Mar 23

            L (Longitude of perihelion)     : 230.55684
            B (Latitude of perihelion)      : -16.57672
            P (Orbital period in years)     : 11.64            
        

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. A more printer-friendly version of the same chart can be found below.

Ephemerides:

Date       Time       RA (2000)    DEC (2000)    delta   radius  elong  phase   PA    magn
2023-03-29 00:00 UT   14 28 18.1   +05 50 40     5.951    6.824  148.8    4.4   254   24.4 
2023-03-29 14:15 UT   14 27 52.2   +05 53 51     5.946    6.823  149.3    4.3   253   24.4 
2023-03-30 00:00 UT   14 27 34.5   +05 56 01     5.942    6.823  149.7    4.2   253   24.4 
2023-03-31 00:00 UT   14 26 50.4   +06 01 20     5.934    6.821  150.5    4.1   251   24.4 
2023-04-01 00:00 UT   14 26 05.8   +06 06 39     5.926    6.820  151.4    4.0   249   24.4 
2023-04-02 00:00 UT   14 25 20.8   +06 11 57     5.919    6.819  152.2    3.9   248   24.4 
2023-04-03 00:00 UT   14 24 35.4   +06 17 13     5.912    6.818  153.1    3.8   246   24.4 
2023-04-04 00:00 UT   14 23 49.6   +06 22 28     5.905    6.817  153.9    3.7   244   24.4 
2023-04-05 00:00 UT   14 23 03.5   +06 27 41     5.899    6.816  154.6    3.6   242   24.4 
2023-04-06 00:00 UT   14 22 16.9   +06 32 52     5.893    6.815  155.3    3.5   239   24.4 
2023-04-07 00:00 UT   14 21 30.0   +06 38 02     5.887    6.814  156.0    3.4   237   24.3 
2023-04-08 00:00 UT   14 20 42.7   +06 43 10     5.882    6.813  156.7    3.3   235   24.3 
2023-04-09 00:00 UT   14 19 55.1   +06 48 15     5.877    6.811  157.3    3.3   232   24.3 
2023-04-10 00:00 UT   14 19 07.3   +06 53 19     5.872    6.810  157.9    3.2   229   24.3 
2023-04-11 00:00 UT   14 18 19.1   +06 58 20     5.868    6.809  158.4    3.1   226   24.3 
2023-04-12 00:00 UT   14 17 30.6   +07 03 19     5.864    6.808  158.9    3.0   223   24.3 
2023-04-13 00:00 UT   14 16 41.9   +07 08 15     5.860    6.807  159.3    3.0   220   24.3 
2023-04-14 00:00 UT   14 15 53.0   +07 13 08     5.857    6.806  159.6    2.9   217   24.3 
2023-04-15 00:00 UT   14 15 03.8   +07 17 58     5.854    6.805  159.9    2.9   214   24.3 
2023-04-16 00:00 UT   14 14 14.4   +07 22 46     5.851    6.803  160.1    2.9   210   24.3 
2023-04-17 00:00 UT   14 13 24.9   +07 27 30     5.849    6.802  160.3    2.9   207   24.3 
2023-04-18 00:00 UT   14 12 35.2   +07 32 11     5.847    6.801  160.4    2.8   203   24.3 
2023-04-19 00:00 UT   14 11 45.3   +07 36 48     5.846    6.800  160.4    2.8   200   24.3 
2023-04-20 00:00 UT   14 10 55.4   +07 41 22     5.845    6.799  160.3    2.9   196   24.3 
2023-04-21 00:00 UT   14 10 05.3   +07 45 53     5.844    6.798  160.2    2.9   193   24.3 
2023-04-22 00:00 UT   14 09 15.2   +07 50 20     5.844    6.797  160.0    2.9   189   24.3 
2023-04-23 00:00 UT   14 08 25.0   +07 54 42     5.844    6.795  159.7    2.9   186   24.3 
2023-04-24 00:00 UT   14 07 34.7   +07 59 01     5.844    6.794  159.4    3.0   182   24.3 
2023-04-25 00:00 UT   14 06 44.5   +08 03 16     5.845    6.793  159.0    3.0   179   24.3 
2023-04-26 00:00 UT   14 05 54.2   +08 07 27     5.846    6.792  158.6    3.1   176   24.3 
2023-04-27 00:00 UT   14 05 04.0   +08 11 33     5.847    6.791  158.1    3.2   173   24.3 
2023-04-28 00:00 UT   14 04 13.8   +08 15 35     5.849    6.790  157.5    3.2   170   24.3 

    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.