SpaceAtlas Space Object Data
NASA JPL SBDB · 2017 LD

2017 LD

2017 LD belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.395 AU it takes 1.65 yr to circle the Sun.

Apollo Observations: 133
Orbital Period · P
1.65 yr
v(q)
33.6 km/s
v(Q)
19 km/s
Diameter · ≈
0.01 km
TJ
4.73
Eccentricity · e
0.2778

Orbit and dynamics

The path is an ellipse reaching 1.007 AU from the Sun at perihelion and 1.783 AU at aphelion, a radial span of 0.776 AU.

Applying Kepler's third law to a = 1.395 AU gives an orbital period of 1.65 yr, or about 602 days.

An eccentricity of 0.278 makes the orbit moderately elongated.

Its inclination of 0.07° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 33.6 km/s at perihelion and falls to 19 km/s at aphelion.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 27.5 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.01 km.

Observation record and orbit quality

The current orbit solution is based on 133 observations and has a weighted RMS residual of 0.4025 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
1.395 AU
Eccentricity
0.2778
Perihelion
1.007 AU
Aphelion
1.782531 AU
Inclination
0.07°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
158.09°

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
2045-Jun-06 15:02 0.003594 AU
537696 km
4.77 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
27.5

Orbit Quality

RMS
0.40246
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

Explore asteroids, comets and near-Earth objects with JPL orbital data.