SpaceAtlas Space Object Data
NASA JPL SBDB · 2020 YY3

2020 YY3

2020 YY3 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.165 AU it takes 1.26 yr to circle the Sun.

Apollo Observations: 22
Orbital Period · P
1.26 yr
v(q)
37.1 km/s
v(Q)
20.5 km/s
Diameter · ≈
0.02 km
TJ
5.37
Eccentricity · e
0.2875

Orbit and dynamics

Between its closest point (0.83 AU) and its farthest (1.5 AU), the heliocentric distance changes by 0.67 AU over every revolution.

One full revolution takes 1.26 yr (459 days), computed from the semi-major axis of 1.165 AU.

An eccentricity of 0.287 makes the orbit moderately elongated.

Its inclination of 4.05° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 37.1 km/s at perihelion and falls to 20.5 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 = 26.47 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.02 km.

Observation record and orbit quality

Astrometry from 22 individual observations underpins this orbit; the fit leaves an RMS residual of 0.2993 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
1.165 AU
Eccentricity
0.2875
Perihelion
0.83 AU
Aphelion
1.499938 AU
Inclination
4.05°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
172.52°

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
2031-Jan-04 20:33 0.224257 AU
33548306 km
19.53 km/s
2034-Jun-21 10:05 0.217681 AU
32564594 km
20.22 km/s
2069-Apr-28 20:36 0.452957 AU
67761398 km
8.56 km/s
2069-Dec-21 00:52 0.053406 AU
7989497 km
10.76 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
26.47

Orbit Quality

RMS
0.29933
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.

Keep exploring

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