SpaceAtlas Space Object Data
NASA JPL SBDB · 2018 TL3

2018 TL3

2018 TL3 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.207 AU it takes 1.33 yr to circle the Sun.

Apollo Observations: 41
Orbital Period · P
1.33 yr
v(q)
32 km/s
v(Q)
23 km/s
Diameter · ≈
0.05 km
TJ
5.09
Eccentricity · e
0.1629

Orbit and dynamics

Between its closest point (1.01 AU) and its farthest (1.404 AU), the heliocentric distance changes by 0.394 AU over every revolution.

One full revolution takes 1.33 yr (484 days), computed from the semi-major axis of 1.207 AU.

An eccentricity of 0.163 makes the orbit moderately elongated.

A steep inclination of 35.45° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 32 km/s at perihelion and falls to 23 km/s at aphelion.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 24.38 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.05 km.

Observation record and orbit quality

Astrometry from 41 individual observations underpins this orbit; the fit leaves an RMS residual of 0.2753 arcseconds.

Condition code U = 8 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
1.207 AU
Eccentricity
0.1629
Perihelion
1.01 AU
Aphelion
1.40362 AU
Inclination
35.45°
Orbital Period
— yr
Epoch
2458398.5
Mean Anomaly
307.99°

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

No close approaches to Earth are currently on record for this object.

Physical Parameters

Diameter
— km
Albedo
—
Density
— g/cm³
Rotation Period
— h
Absolute Magnitude
24.38

Orbit Quality

RMS
0.27533
Condition
8
Orbit ID
—
Data source: NASA JPL Small-Body Database . 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.

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