SpaceAtlas Space Object Data
NASA JPL SBDB · 2020 YL1

2020 YL1

2020 YL1 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.982 AU it takes 2.79 yr to circle the Sun.

Apollo Observations: 86
Orbital Period · P
2.79 yr
v(q)
42.5 km/s
v(Q)
10.5 km/s
Diameter · ≈
0.29 km
TJ
3.27
Eccentricity · e
0.6024

Orbit and dynamics

Between its closest point (0.788 AU) and its farthest (3.176 AU), the heliocentric distance changes by 2.388 AU over every revolution.

One full revolution takes 2.79 yr (1,019 days), computed from the semi-major axis of 1.982 AU.

The high eccentricity (0.602) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

A steep inclination of 48.92° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 42.5 km/s at perihelion and falls to 10.5 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 = 20.43 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.29 km.

Observation record and orbit quality

Astrometry from 86 individual observations underpins this orbit; the fit leaves an RMS residual of 0.4111 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
1.982 AU
Eccentricity
0.6024
Perihelion
0.788 AU
Aphelion
3.175957 AU
Inclination
48.92°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
14.77°

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
2034-Jul-19 05:57 0.310474 AU
46446228 km
25.84 km/s
2048-Jul-07 04:48 0.043131 AU
6452333 km
29.17 km/s
2059-Dec-27 08:57 0.434705 AU
65030883 km
31.72 km/s
2062-Jun-27 05:02 0.213453 AU
31932141 km
33.27 km/s
2073-Dec-21 09:40 0.388966 AU
58188444 km
27.52 km/s
2076-Jun-15 21:06 0.445650 AU
66668328 km
38.10 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
20.43

Orbit Quality

RMS
0.41112
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.

Keep exploring

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