SpaceAtlas Space Object Data
NASA JPL SBDB · 2020 YN3

2020 YN3

2020 YN3 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.98 AU and a period of 0.97 yr.

Aten Observations: 119
Orbital Period · P
0.97 yr
v(q)
41.8 km/s
v(Q)
21.7 km/s
Diameter · ≈
0.07 km
TJ
6.13
Eccentricity · e
0.3176

Orbit and dynamics

Between its closest point (0.668 AU) and its farthest (1.291 AU), the heliocentric distance changes by 0.623 AU over every revolution.

One full revolution takes 0.97 yr (354 days), computed from the semi-major axis of 0.98 AU.

An eccentricity of 0.318 makes the orbit moderately elongated.

Its inclination of 3.69° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 41.8 km/s at perihelion and falls to 21.7 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 = 23.38 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.07 km.

Observation record and orbit quality

Astrometry from 119 individual observations underpins this orbit; the fit leaves an RMS residual of 0.627 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
0.9795 AU
Eccentricity
0.3176
Perihelion
0.668 AU
Aphelion
1.290589 AU
Inclination
3.69°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
312.57°

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
2027-May-02 05:02 0.074577 AU
11156624 km
11.30 km/s
2050-Dec-22 01:28 0.143286 AU
21435310 km
14.29 km/s
2051-Dec-17 11:29 0.055661 AU
8326708 km
8.52 km/s
2057-Apr-27 00:45 0.164362 AU
24588150 km
6.12 km/s
2058-May-02 09:18 0.067688 AU
10125922 km
10.94 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
23.38

Orbit Quality

RMS
0.62701
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.

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