SpaceAtlas Space Object Data
NASA JPL SBDB · 2019 LO4

2019 LO4

2019 LO4 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.701 AU once every 2.22 yr.

Amor Observations: 59
Orbital Period · P
2.22 yr
v(q)
29.6 km/s
v(Q)
17.6 km/s
Diameter · ≈
0.27 km
TJ
3.97
Eccentricity · e
0.2522

Orbit and dynamics

Between its closest point (1.272 AU) and its farthest (2.13 AU), the heliocentric distance changes by 0.858 AU over every revolution.

One full revolution takes 2.22 yr (810 days), computed from the semi-major axis of 1.701 AU.

An eccentricity of 0.252 makes the orbit moderately elongated.

A steep inclination of 35.02° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 29.6 km/s at perihelion and falls to 17.6 km/s at aphelion.

Its perihelion lies just outside Earth's orbit, which is why it is classed as Earth-approaching rather than Earth-crossing.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 20.6 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.27 km.

Observation record and orbit quality

Astrometry from 59 individual observations underpins this orbit; the fit leaves an RMS residual of 0.5779 arcseconds.

Condition code U = 2 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
1.701 AU
Eccentricity
0.2522
Perihelion
1.272 AU
Aphelion
2.129992 AU
Inclination
35.02°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
3.3°

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-Jun-15 09:17 0.493412 AU
73813350 km
18.72 km/s
2039-Jun-09 01:55 0.491130 AU
73471977 km
16.94 km/s
2059-Jun-12 04:52 0.444001 AU
66421579 km
17.24 km/s
2079-Jun-14 15:50 0.446884 AU
66852826 km
17.85 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
20.6

Orbit Quality

RMS
0.57791
Condition
2
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.