SpaceAtlas Space Object Data
NASA JPL SBDB · 2020 YW

2020 YW

2020 YW belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.01 AU it takes 1.02 yr to circle the Sun.

Apollo Observations: 97
Orbital Period · P
1.02 yr
v(q)
63.3 km/s
v(Q)
13.9 km/s
Diameter · ≈
0.09 km
TJ
5.82
Eccentricity · e
0.6408

Orbit and dynamics

Between its closest point (0.363 AU) and its farthest (1.657 AU), the heliocentric distance changes by 1.294 AU over every revolution.

One full revolution takes 1.02 yr (371 days), computed from the semi-major axis of 1.01 AU.

The high eccentricity (0.641) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 10.28° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 63.3 km/s at perihelion and falls to 13.9 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 = 23.03 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.09 km.

Observation record and orbit quality

Astrometry from 97 individual observations underpins this orbit; the fit leaves an RMS residual of 0.4298 arcseconds.

Condition code U = 1 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
1.01 AU
Eccentricity
0.6408
Perihelion
0.363 AU
Aphelion
1.657208 AU
Inclination
10.28°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
81.4°

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
2026-Dec-06 17:20 0.491628 AU
73546491 km
15.11 km/s
2043-Jul-20 09:42 0.493993 AU
73900260 km
15.88 km/s
2043-Sep-23 17:10 0.451604 AU
67558936 km
13.97 km/s
2044-Sep-16 10:10 0.390628 AU
58437075 km
13.65 km/s
2045-Sep-10 19:06 0.322270 AU
48210900 km
14.04 km/s
2046-Sep-08 20:35 0.253850 AU
37975396 km
15.70 km/s
2047-Sep-10 09:18 0.199475 AU
29840975 km
18.10 km/s
2048-Sep-12 09:57 0.177549 AU
26561016 km
20.81 km/s
2049-Sep-16 00:38 0.199997 AU
29919128 km
23.56 km/s
2050-Sep-19 22:51 0.254398 AU
38057347 km
26.40 km/s
2051-Sep-24 01:08 0.323813 AU
48441705 km
29.22 km/s
2052-Sep-27 05:59 0.399994 AU
59838188 km
32.11 km/s
2053-Oct-01 12:31 0.478575 AU
71593780 km
34.96 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
23.03

Orbit Quality

RMS
0.42978
Condition
1
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

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