(66391) 1999 KW4
ephemeris date magn radius delta (AU) delta (LD) delta (km) ra dec elong phase
Today24 Mar 201915.80.205 AU1.021 AU397.11 LD152,674,484 km00h56m+01°45'11.6°77.6°
Approach25 May 201912.81.007 AU0.036 AU13.86 LD5,328,996 km08h16m-33°06'80.0°98.0°
Brightest27 May 201912.61.014 AU0.039 AU15.12 LD5,811,613 km09h42m-19°23'89.9°87.9°

Based on its absolute magnitude (Hₒ) of 16.5and an albedo between 0.25 and 0.05, the estimated diameter of (66391) 1999 KW4 is 1 - 3 km.

(66391) 1999 KW4- 2019-03-24

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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 lightcurve 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 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.