SpaceAtlas Space Object Data
NASA JPL SBDB · 2018 TX1

2018 TX1

2018 TX1 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.253 AU once every 1.40 yr.

Amor Observations: 61
Orbital Period · P
1.40 yr
v(q)
30.8 km/s
v(Q)
23 km/s
Diameter · ≈
0.05 km
TJ
5.06
Eccentricity · e
0.1444

Orbit and dynamics

The path is an ellipse reaching 1.072 AU from the Sun at perihelion and 1.434 AU at aphelion, a radial span of 0.362 AU.

Applying Kepler's third law to a = 1.253 AU gives an orbital period of 1.40 yr, or about 512 days.

An eccentricity of 0.144 makes the orbit moderately elongated.

A steep inclination of 20.85° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 30.8 km/s at perihelion and falls to 23 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 = 24.34 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.05 km.

Observation record and orbit quality

The current orbit solution is based on 61 observations and has a weighted RMS residual of 0.5074 arcseconds.

Condition code U = 1 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
1.253 AU
Eccentricity
0.1444
Perihelion
1.072 AU
Aphelion
1.433933 AU
Inclination
20.85°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
149.63°

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
2032-Oct-07 11:23 0.186176 AU
27851479 km
11.24 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
24.34

Orbit Quality

RMS
0.50737
Condition
1
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.

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