2015 WP2

Orbit and dynamics

The path is an ellipse reaching 0.779 AU from the Sun at perihelion and 2.092 AU at aphelion, a radial span of 1.313 AU.

Applying Kepler's third law to a = 1.436 AU gives an orbital period of 1.72 yr, or about 629 days.

The high eccentricity (0.457) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

Its inclination of 1.71° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 40.7 km/s at perihelion and falls to 15.2 km/s at aphelion.

Because q < 1 AU and Q > 1 AU, this orbit geometrically intersects the region of Earth's orbit.

Size and surface

Neither a measured diameter nor a reliable absolute magnitude is available for 2015 WP2, so its physical size remains unconstrained.

Observation record and orbit quality

The current orbit solution is based on 40 observations and has a weighted RMS residual of 0.5191 arcseconds.

Condition code U = 7 signals a poorly constrained orbit, so its future path should be treated as provisional.