SpaceAtlas Space Object Data
NASA JPL SBDB · 2020 YK3

2020 YK3

2020 YK3 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.82 AU and a period of 0.74 yr.

Aten Observations: 25
Orbital Period · P
0.74 yr
v(q)
41.1 km/s
v(Q)
26.3 km/s
Diameter · ≈
0.01 km
TJ
7.12
Eccentricity · e
0.2203

Orbit and dynamics

The path is an ellipse reaching 0.64 AU from the Sun at perihelion and 1.001 AU at aphelion, a radial span of 0.361 AU.

Applying Kepler's third law to a = 0.82 AU gives an orbital period of 0.74 yr, or about 271 days.

An eccentricity of 0.22 makes the orbit moderately elongated.

Its inclination of 2.59° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 41.1 km/s at perihelion and falls to 26.3 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 = 27.17 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.01 km.

Observation record and orbit quality

The current orbit solution is based on 25 observations and has a weighted RMS residual of 0.4763 arcseconds.

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

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
0.8204 AU
Eccentricity
0.2203
Perihelion
0.64 AU
Aphelion
1.001134 AU
Inclination
2.59°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
300.12°

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
2040-Nov-27 03:01 0.061801 AU
9245253 km
10.63 km/s
2047-Jan-22 01:32 0.012234 AU
1830189 km
8.23 km/s
2063-Nov-27 18:33 0.054706 AU
8183935 km
6.51 km/s
2067-Jan-10 03:21 0.006739 AU
1008121 km
4.57 km/s
2070-Jan-21 00:56 0.012364 AU
1849597 km
9.84 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
27.17

Orbit Quality

RMS
0.47633
Condition
7
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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