SpaceAtlas Space Object Data
NASA JPL SBDB · 2018 VQ9

2018 VQ9

2018 VQ9 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 2.799 AU it takes 4.68 yr to circle the Sun.

Apollo Observations: 54
Orbital Period · P
4.68 yr
v(q)
39 km/s
v(Q)
8.1 km/s
Diameter · ≈
0.23 km
TJ
2.89
Eccentricity · e
0.6546

Orbit and dynamics

Between its closest point (0.967 AU) and its farthest (4.631 AU), the heliocentric distance changes by 3.664 AU over every revolution.

One full revolution takes 4.68 yr (1,710 days), computed from the semi-major axis of 2.799 AU.

The high eccentricity (0.655) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

A steep inclination of 22.1° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 39 km/s at perihelion and falls to 8.1 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 = 20.97 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.23 km.

Observation record and orbit quality

Astrometry from 54 individual observations underpins this orbit; the fit leaves an RMS residual of 0.3712 arcseconds.

Condition code U = 4 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
2.799 AU
Eccentricity
0.6546
Perihelion
0.967 AU
Aphelion
4.631225 AU
Inclination
22.1°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
216.04°

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
2033-Jan-11 03:53 0.245581 AU
36738349 km
14.37 km/s
2047-Jan-14 21:52 0.227478 AU
34030293 km
14.09 km/s
2061-Feb-16 23:11 0.235414 AU
35217505 km
21.11 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
20.97

Orbit Quality

RMS
0.37123
Condition
4
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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