SpaceAtlas Space Object Data
NASA JPL SBDB · 2020 WY

2020 WY

2020 WY belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.02 AU it takes 1.03 yr to circle the Sun.

Apollo Observations: 99
Orbital Period · P
1.03 yr
v(q)
30.3 km/s
v(Q)
28.7 km/s
Diameter · ≈
0.02 km
TJ
5.99
Eccentricity · e
0.0286

Orbit and dynamics

The path is an ellipse reaching 0.991 AU from the Sun at perihelion and 1.049 AU at aphelion, a radial span of 0.058 AU.

Applying Kepler's third law to a = 1.02 AU gives an orbital period of 1.03 yr, or about 376 days.

With e = 0.029, the orbit is close to circular.

Its inclination of 1.7° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 30.3 km/s at perihelion and falls to 28.7 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 = 26.2 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.02 km.

Observation record and orbit quality

The current orbit solution is based on 99 observations and has a weighted RMS residual of 0.5512 arcseconds.

Condition code U = 2 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
1.02 AU
Eccentricity
0.0286
Perihelion
0.991 AU
Aphelion
1.049172 AU
Inclination
1.7°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
268.16°

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
2052-Apr-15 04:13 0.314928 AU
47112555 km
10.53 km/s
2053-Apr-23 00:41 0.129563 AU
19382285 km
4.99 km/s
2054-Mar-04 21:48 0.052292 AU
7822761 km
1.29 km/s
2054-Jul-05 20:16 0.026237 AU
3925045 km
1.41 km/s
2054-Oct-26 20:54 0.052184 AU
7806675 km
1.15 km/s
2055-Sep-11 17:17 0.129602 AU
19388241 km
5.01 km/s
2056-Sep-18 09:56 0.312343 AU
46725918 km
10.46 km/s
2057-Sep-24 20:48 0.495971 AU
74196219 km
15.89 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
26.2

Orbit Quality

RMS
0.55116
Condition
2
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.

Keep exploring

Explore asteroids, comets and near-Earth objects with JPL orbital data.