SpaceAtlas Space Object Data
NASA JPL SBDB · 2021 GS2

2021 GS2

2021 GS2 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 2.389 AU once every 3.69 yr.

Amor Observations: 38
Orbital Period · P
3.69 yr
v(q)
36.9 km/s
v(Q)
10.1 km/s
Diameter · ≈
0.05 km
TJ
3.29
Eccentricity · e
0.5708

Orbit and dynamics

Between its closest point (1.025 AU) and its farthest (3.753 AU), the heliocentric distance changes by 2.728 AU over every revolution.

One full revolution takes 3.69 yr (1,349 days), computed from the semi-major axis of 2.389 AU.

The high eccentricity (0.571) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

Its inclination of 3.66° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 36.9 km/s at perihelion and falls to 10.1 km/s at aphelion.

Its perihelion lies just outside Earth's orbit, which is why it is classed as Earth-approaching rather than Earth-crossing.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 24.27 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.05 km.

Observation record and orbit quality

Astrometry from 38 individual observations underpins this orbit; the fit leaves an RMS residual of 0.4152 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
2.389 AU
Eccentricity
0.5708
Perihelion
1.025 AU
Aphelion
3.752641 AU
Inclination
3.66°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
135.36°

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
2032-Jul-07 22:24 0.216960 AU
32456713 km
18.61 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
24.27

Orbit Quality

RMS
0.41519
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.