SpaceAtlas Space Object Data
NASA JPL SBDB · 2016 LB9

2016 LB9

2016 LB9 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.796 AU it takes 2.41 yr to circle the Sun.

Apollo Observations: 53
Orbital Period · P
2.41 yr
v(q)
37.6 km/s
v(Q)
13.1 km/s
Diameter · ≈
0.19 km
TJ
3.92
Eccentricity · e
0.4827

Orbit and dynamics

The path is an ellipse reaching 0.929 AU from the Sun at perihelion and 2.663 AU at aphelion, a radial span of 1.734 AU.

Applying Kepler's third law to a = 1.796 AU gives an orbital period of 2.41 yr, or about 879 days.

The high eccentricity (0.483) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 7.9° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 37.6 km/s at perihelion and falls to 13.1 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 = 21.41 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.19 km.

Observation record and orbit quality

The current orbit solution is based on 53 observations and has a weighted RMS residual of 0.5097 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
1.796 AU
Eccentricity
0.4827
Perihelion
0.929 AU
Aphelion
2.662929 AU
Inclination
7.9°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
17.59°

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
2028-Oct-27 15:11 0.266999 AU
39942515 km
17.27 km/s
2040-Nov-10 05:33 0.488190 AU
73032197 km
24.18 km/s
2045-Jun-21 19:41 0.331064 AU
49526516 km
19.27 km/s
2057-Jul-09 04:55 0.131313 AU
19644197 km
12.88 km/s
2069-Aug-09 04:27 0.076370 AU
11424737 km
9.48 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
21.41

Orbit Quality

RMS
0.50973
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

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