SpaceAtlas Space Object Data
NASA JPL SBDB · 2022 WH15

2022 WH15

2022 WH15 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.464 AU it takes 1.77 yr to circle the Sun.

Apollo Observations: 46
Orbital Period · P
1.77 yr
v(q)
36.2 km/s
v(Q)
16.7 km/s
Diameter · ≈
0.19 km
TJ
4.52
Eccentricity · e
0.3672

Orbit and dynamics

The path is an ellipse reaching 0.926 AU from the Sun at perihelion and 2.002 AU at aphelion, a radial span of 1.076 AU.

Applying Kepler's third law to a = 1.464 AU gives an orbital period of 1.77 yr, or about 647 days.

An eccentricity of 0.367 makes the orbit moderately elongated.

The orbital plane is tilted 13.12° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 36.2 km/s at perihelion and falls to 16.7 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 = 21.41 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.19 km.

Observation record and orbit quality

The current orbit solution is based on 46 observations and has a weighted RMS residual of 0.7154 arcseconds.

Condition code U = 0 means the orbit is very well determined, leaving only a small uncertainty in the future ephemeris.

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
1.464 AU
Eccentricity
0.3672
Perihelion
0.926 AU
Aphelion
2.001581 AU
Inclination
13.12°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
292.44°

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
2046-Apr-10 17:34 0.116762 AU
17467381 km
9.99 km/s
2062-Feb-13 03:30 0.178877 AU
26759572 km
12.79 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
21.41

Orbit Quality

RMS
0.71543
Condition
0
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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