SpaceAtlas Space Object Data
NASA JPL SBDB · 2018 QQ

2018 QQ

2018 QQ is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.306 AU once every 1.49 yr.

Amor Observations: 55
Orbital Period · P
1.49 yr
v(q)
32.4 km/s
v(Q)
21 km/s
Diameter · ≈
0.03 km
TJ
4.96
Eccentricity · e
0.2146

Orbit and dynamics

Between its closest point (1.026 AU) and its farthest (1.586 AU), the heliocentric distance changes by 0.56 AU over every revolution.

One full revolution takes 1.49 yr (545 days), computed from the semi-major axis of 1.306 AU.

An eccentricity of 0.215 makes the orbit moderately elongated.

The orbital plane is tilted 6.27° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 32.4 km/s at perihelion and falls to 21 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 = 25.58 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.03 km.

Observation record and orbit quality

Astrometry from 55 individual observations underpins this orbit; the fit leaves an RMS residual of 0.3891 arcseconds.

Condition code U = 0 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
1.306 AU
Eccentricity
0.2146
Perihelion
1.026 AU
Aphelion
1.586268 AU
Inclination
6.27°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
102.41°

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-Jun-09 13:32 0.184834 AU
27650788 km
7.64 km/s
2030-May-30 03:58 0.278548 AU
41670132 km
10.82 km/s
2030-Oct-07 04:14 0.331768 AU
49631833 km
3.80 km/s
2033-May-22 12:03 0.383759 AU
57409593 km
14.12 km/s
2033-Oct-24 10:27 0.393384 AU
58849447 km
5.16 km/s
2036-May-15 17:26 0.495183 AU
74078273 km
17.48 km/s
2036-Nov-06 02:09 0.443849 AU
66398886 km
6.19 km/s
2039-Nov-17 16:23 0.485282 AU
72597164 km
7.06 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
25.58

Orbit Quality

RMS
0.3891
Condition
0
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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