2019 BZ4
ephemeris date magn radius delta (AU) delta (LD) delta (km) ra dec elong phase
Today25 Oct 202024.11.229 AU0.237 AU92.38 LD35,516,089 km02h07m+03°00'170.7°7.5°
Approach12 Jan 202118.81.003 AU0.021 AU8.09 LD3,112,045 km06h09m+27°23'159.2°20.4°
Brightest15 Jan 202118.51.005 AU0.022 AU8.52 LD3,276,617 km07h30m+29°43'170.6°9.2°

Based on its absolute magnitude (Hₒ) of 26.2 and an albedo between 0.25 and 0.05, the estimated diameter of 2019 BZ4 is 15 - 35 m.

2019 BZ4- 2020-10-25
astro.vanbuitenen.nl


 
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The interactive orbit chart above shows the near-earth object'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 light curve chart below shows the estimated development of the NEO's magnitude during its approach to earth.


The following all-sky chart shows the path of the NEO in the coming months.





The following chart shows the path of the NEO in the coming days or hours. The field of view is optimized for (~10x50) binoculars and finderscopes. A more printer-friendly version of the same chart can be found below.


    Terminology:
            
    delta:  distance between NEO and earth in AU or LD 
    radius: distance between NEO 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-NEO)    
    phase:  phase angle in degrees (angle sun-NEO-earth)        
    AU:     Astronomical Unit: mean distance between earth and sun (149597870.7 km)
    LD:     Lunar distance: Mean distance between earth and the moon (~0.00257 AU)
    

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.