SpaceAtlas Space Object Data
NASA JPL SBDB · 2018 LD3

2018 LD3

2018 LD3 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.408 AU it takes 1.67 yr to circle the Sun.

Apollo Observations: 77
Orbital Period · P
1.67 yr
v(q)
33.6 km/s
v(Q)
18.7 km/s
Diameter · ≈
0.07 km
TJ
4.6
Eccentricity · e
0.2841

Orbit and dynamics

Between its closest point (1.008 AU) and its farthest (1.808 AU), the heliocentric distance changes by 0.8 AU over every revolution.

One full revolution takes 1.67 yr (610 days), computed from the semi-major axis of 1.408 AU.

An eccentricity of 0.284 makes the orbit moderately elongated.

A steep inclination of 25.03° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 33.6 km/s at perihelion and falls to 18.7 km/s at aphelion.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 23.59 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.07 km.

Observation record and orbit quality

Astrometry from 77 individual observations underpins this orbit; the fit leaves an RMS residual of 0.5338 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
1.408 AU
Eccentricity
0.2841
Perihelion
1.008 AU
Aphelion
1.808013 AU
Inclination
25.03°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
254.14°

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
23.59

Orbit Quality

RMS
0.5338
Condition
0
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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