SpaceAtlas Space Object Data
NASA JPL SBDB · 2018 LC1

2018 LC1

2018 LC1 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.194 AU it takes 1.30 yr to circle the Sun.

Apollo Observations: 91
Orbital Period · P
1.30 yr
v(q)
34.8 km/s
v(Q)
21.4 km/s
Diameter · ≈
0.04 km
TJ
5.29
Eccentricity · e
0.2391

Orbit and dynamics

The path is an ellipse reaching 0.908 AU from the Sun at perihelion and 1.479 AU at aphelion, a radial span of 0.571 AU.

Applying Kepler's third law to a = 1.194 AU gives an orbital period of 1.30 yr, or about 477 days.

An eccentricity of 0.239 makes the orbit moderately elongated.

Its inclination of 3.26° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 34.8 km/s at perihelion and falls to 21.4 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 = 24.9 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.04 km.

Observation record and orbit quality

The current orbit solution is based on 91 observations and has a weighted RMS residual of 0.4686 arcseconds.

Condition code U = 6 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
1.194 AU
Eccentricity
0.2391
Perihelion
0.908 AU
Aphelion
1.479485 AU
Inclination
3.26°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
91.22°

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
2030-Nov-11 04:47 0.405407 AU
60647990 km
7.67 km/s
2031-Jun-24 12:22 0.241731 AU
36162401 km
14.78 km/s
2039-Jan-09 03:23 0.364460 AU
54522425 km
19.32 km/s
2039-Sep-09 22:04 0.442060 AU
66131302 km
7.87 km/s
2043-Oct-19 23:58 0.461458 AU
69033093 km
8.40 km/s
2048-Jun-07 18:47 0.017013 AU
2545128 km
7.65 km/s
2052-Jan-27 08:08 0.090444 AU
13530217 km
9.09 km/s
2052-Aug-08 19:43 0.351684 AU
52611236 km
6.01 km/s
2056-Sep-22 17:49 0.475750 AU
71171137 km
8.31 km/s
2061-Jul-01 17:41 0.295603 AU
44221619 km
18.99 km/s
2069-Jan-17 14:37 0.084126 AU
12585102 km
13.84 km/s
2077-Nov-17 15:06 0.373928 AU
55938795 km
7.35 km/s
2078-Jun-20 12:22 0.137437 AU
20560264 km
12.66 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
24.9

Orbit Quality

RMS
0.46855
Condition
6
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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