SpaceAtlas Space Object Data
NASA JPL SBDB · 2019 WF3

2019 WF3

2019 WF3 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 2.334 AU it takes 3.57 yr to circle the Sun.

Apollo Observations: 126
Orbital Period · P
3.57 yr
v(q)
37.4 km/s
v(Q)
10.2 km/s
Diameter · ≈
0.22 km
TJ
3.3
Eccentricity · e
0.5731

Orbit and dynamics

The path is an ellipse reaching 0.997 AU from the Sun at perihelion and 3.672 AU at aphelion, a radial span of 2.675 AU.

Applying Kepler's third law to a = 2.334 AU gives an orbital period of 3.57 yr, or about 1,302 days.

The high eccentricity (0.573) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 12.86° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 37.4 km/s at perihelion and falls to 10.2 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

No direct size measurement is available; from an absolute magnitude of H = 21.06 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.22 km.

Observation record and orbit quality

The current orbit solution is based on 126 observations and has a weighted RMS residual of 0.4361 arcseconds.

Condition code U = 5 indicates a moderately constrained orbit; predictions decades ahead still carry noticeable uncertainty.

About these computed values

Orbital periods, perihelion and aphelion speeds, and diameter estimates on this page are computed by SpaceAtlas from the JPL SBDB orbital elements. They are derived quantities, not values copied from the source catalogue.

Orbital Parameters

Semi-Major Axis
2.334 AU
Eccentricity
0.5731
Perihelion
0.997 AU
Aphelion
3.671615 AU
Inclination
12.86°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
275.56°

Orbit diagram

The Sun sits at the focus (orange). Earth's orbit is the grey circle at 1 AU. The red dot marks the object's position at the catalog epoch.

3D orbit (interactive)

Drag to rotate; scroll or pinch to zoom. The Sun is at the focus (orange), Earth's orbit is the grey ring at 1 AU, and the red dot marks the object's current position.

Close approaches

Predicted close approaches to Earth, from NASA's Center for Near-Earth Object Studies (CNEOS).

Date (UTC)Miss distanceVelocity
2044-Dec-31 05:39 0.194868 AU
29151773 km
16.02 km/s
2052-Mar-27 18:03 0.339744 AU
50825016 km
16.87 km/s
2077-Jan-30 21:00 0.055631 AU
8322224 km
10.25 km/s

Distances in astronomical units (AU) and kilometres. Source: NASA/JPL CNEOS Close Approach Data API.

Physical Parameters

Diameter
— km
Albedo
—
Density
— g/cm³
Rotation Period
— h
Absolute Magnitude
21.06

Orbit Quality

RMS
0.43614
Condition
5
Orbit ID
—
Data source: NASA JPL Small-Body Database · NASA CNEOS. Orbital periods, perihelion and aphelion speeds, and diameter estimates on this page are computed by SpaceAtlas from the JPL SBDB orbital elements. They are derived quantities, not values copied from the source catalogue.

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