2004 SY4
ephemeris date magn radius delta (AU) delta (LD) delta (km) ra dec elong phase
Brightest16 Oct 201920.51.017 AU0.054 AU21.04 LD8,087,693 km20h33m+28°13'109.9°67.2°
Approach17 Oct 201920.51.015 AU0.054 AU20.90 LD8,036,156 km20h33m+34°45'108.9°68.2°
Today24 Feb 202026.81.754 AU0.989 AU384.65 LD147,886,547 km06h50m+35°07'125.0°27.5°

Based on its absolute magnitude (Hₒ) of 24.4 and an albedo between 0.25 and 0.05, the estimated diameter of 2004 SY4 is 35 - 80 m.

2004 SY4- 2020-02-24
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.