SpaceAtlas Space Object Data
NASA JPL SBDB · 2018 QS1

2018 QS1

2018 QS1 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: 9
Orbital Period · P
0.97 yr
v(q)
34.7 km/s
v(Q)
26.1 km/s
Diameter · ≈
0.01 km
TJ
6.09
Eccentricity · e
0.1417

Orbit and dynamics

The path is an ellipse reaching 0.841 AU from the Sun at perihelion and 1.118 AU at aphelion, a radial span of 0.277 AU.

Applying Kepler's third law to a = 0.98 AU gives an orbital period of 0.97 yr, or about 354 days.

An eccentricity of 0.142 makes the orbit moderately elongated.

A steep inclination of 25.62° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 34.7 km/s at perihelion and falls to 26.1 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 = 27.6 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.01 km.

Observation record and orbit quality

The current orbit solution is based on 9 observations and has a weighted RMS residual of 0.5841 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
0.9795 AU
Eccentricity
0.1417
Perihelion
0.841 AU
Aphelion
1.118295 AU
Inclination
25.62°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
277.26°

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
2051-Aug-17 20:49 0.002642 AU
395252 km
16.53 km/s
2052-Aug-10 02:36 0.200630 AU
30013849 km
20.52 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
27.6

Orbit Quality

RMS
0.58412
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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