SpaceAtlas Space Object Data
NASA JPL SBDB · 2013 LB

2013 LB

2013 LB belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.117 AU it takes 1.18 yr to circle the Sun.

Apollo Observations: 64
Orbital Period · P
1.18 yr
v(q)
40.3 km/s
v(Q)
19.7 km/s
Diameter · ≈
0.09 km
TJ
5.53
Eccentricity · e
0.3432

Orbit and dynamics

The path is an ellipse reaching 0.734 AU from the Sun at perihelion and 1.5 AU at aphelion, a radial span of 0.766 AU.

Applying Kepler's third law to a = 1.117 AU gives an orbital period of 1.18 yr, or about 431 days.

An eccentricity of 0.343 makes the orbit moderately elongated.

Its inclination of 2.16° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 40.3 km/s at perihelion and falls to 19.7 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 = 22.87 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.09 km.

Observation record and orbit quality

The current orbit solution is based on 64 observations and has a weighted RMS residual of 0.3891 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
1.117 AU
Eccentricity
0.3432
Perihelion
0.734 AU
Aphelion
1.500354 AU
Inclination
2.16°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
95.08°

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
2031-Dec-07 09:48 0.189564 AU
28358418 km
7.15 km/s
2039-Mar-21 03:30 0.191699 AU
28677756 km
7.27 km/s
2044-Nov-08 16:37 0.126668 AU
18949204 km
6.19 km/s
2057-Nov-27 13:23 0.169420 AU
25344835 km
6.40 km/s
2065-Apr-16 10:18 0.130763 AU
19561896 km
6.27 km/s
2076-Oct-21 09:22 0.147879 AU
22122309 km
14.32 km/s
2078-May-03 13:09 0.053823 AU
8051796 km
11.43 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
22.87

Orbit Quality

RMS
0.38907
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.

Keep exploring

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