SpaceAtlas Space Object Data
NASA JPL SBDB · 2018 QR

2018 QR

2018 QR is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 2.092 AU once every 3.03 yr.

Amor Observations: 43
Orbital Period · P
3.03 yr
v(q)
34.1 km/s
v(Q)
12.4 km/s
Diameter · ≈
0.04 km
TJ
3.61
Eccentricity · e
0.4658

Orbit and dynamics

Between its closest point (1.117 AU) and its farthest (3.066 AU), the heliocentric distance changes by 1.949 AU over every revolution.

One full revolution takes 3.03 yr (1,105 days), computed from the semi-major axis of 2.092 AU.

The high eccentricity (0.466) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

Its inclination of 1.34° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 34.1 km/s at perihelion and falls to 12.4 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 = 24.7 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.04 km.

Observation record and orbit quality

Astrometry from 43 individual observations underpins this orbit; the fit leaves an RMS residual of 0.3435 arcseconds.

Condition code U = 5 indicates a moderately constrained orbit; predictions decades ahead still carry noticeable uncertainty.

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
2.092 AU
Eccentricity
0.4658
Perihelion
1.117 AU
Aphelion
3.066454 AU
Inclination
1.34°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
209.43°

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-Sep-22 23:13 0.437087 AU
65387350 km
15.81 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
24.7

Orbit Quality

RMS
0.34352
Condition
5
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.