SpaceAtlas Space Object Data
NASA JPL SBDB · 2019 LB1

2019 LB1

2019 LB1 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.989 AU and a period of 0.98 yr.

Aten Observations: 61
Orbital Period · P
0.98 yr
v(q)
33.7 km/s
v(Q)
26.6 km/s
Diameter · ≈
0.01 km
TJ
6.13
Eccentricity · e
0.1177

Orbit and dynamics

Between its closest point (0.872 AU) and its farthest (1.105 AU), the heliocentric distance changes by 0.233 AU over every revolution.

One full revolution takes 0.98 yr (359 days), computed from the semi-major axis of 0.989 AU.

An eccentricity of 0.118 makes the orbit moderately elongated.

The orbital plane is tilted 5.46° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 33.7 km/s at perihelion and falls to 26.6 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 = 27 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.01 km.

Observation record and orbit quality

Astrometry from 61 individual observations underpins this orbit; the fit leaves an RMS residual of 0.4131 arcseconds.

Condition code U = 5 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
0.9888 AU
Eccentricity
0.1177
Perihelion
0.872 AU
Aphelion
1.105182 AU
Inclination
5.46°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
145.52°

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
2027-Oct-19 10:03 0.399091 AU
59703195 km
15.34 km/s
2074-Jun-15 12:26 0.385526 AU
57673844 km
15.44 km/s
2075-Jun-11 03:57 0.282484 AU
42259041 km
12.47 km/s
2076-Jun-06 03:30 0.179945 AU
26919451 km
9.55 km/s
2077-Jun-02 15:43 0.079698 AU
11922647 km
6.75 km/s
2078-May-31 21:48 0.008702 AU
1301746 km
4.40 km/s
2079-Jun-02 07:28 0.024899 AU
3724853 km
3.56 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
27.0

Orbit Quality

RMS
0.41309
Condition
5
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.