SpaceAtlas Space Object Data
NASA JPL SBDB · 2018 GC5

2018 GC5

2018 GC5 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.235 AU once every 1.37 yr.

Amor Observations: 32
Orbital Period · P
1.37 yr
v(q)
31 km/s
v(Q)
23.2 km/s
Diameter · ≈
0.02 km
TJ
5.17
Eccentricity · e
0.1431

Orbit and dynamics

The path is an ellipse reaching 1.058 AU from the Sun at perihelion and 1.412 AU at aphelion, a radial span of 0.354 AU.

Applying Kepler's third law to a = 1.235 AU gives an orbital period of 1.37 yr, or about 501 days.

An eccentricity of 0.143 makes the orbit moderately elongated.

The orbital plane is tilted 6.22° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 31 km/s at perihelion and falls to 23.2 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 = 26.1 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.02 km.

Observation record and orbit quality

The current orbit solution is based on 32 observations and has a weighted RMS residual of 0.3956 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
1.235 AU
Eccentricity
0.1431
Perihelion
1.058 AU
Aphelion
1.411729 AU
Inclination
6.22°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
341.36°

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
2029-Apr-10 19:10 0.096509 AU
14437485 km
5.28 km/s
2032-Dec-09 09:40 0.341932 AU
51152278 km
5.67 km/s
2036-Oct-06 09:27 0.407044 AU
60892870 km
7.14 km/s
2047-Oct-22 19:03 0.412228 AU
61668427 km
7.23 km/s
2058-Nov-07 04:21 0.399012 AU
59691287 km
7.00 km/s
2062-Sep-06 07:11 0.355847 AU
53233990 km
6.26 km/s
2066-Apr-10 11:43 0.031382 AU
4694675 km
3.53 km/s
2077-Apr-10 12:16 0.017717 AU
2650476 km
4.06 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
26.1

Orbit Quality

RMS
0.39562
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

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