SpaceAtlas Space Object Data
NASA JPL SBDB · 2021 LR2

2021 LR2

2021 LR2 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.017 AU it takes 1.03 yr to circle the Sun.

Apollo Observations: 21
Orbital Period · P
1.03 yr
v(q)
37.5 km/s
v(Q)
23.3 km/s
Diameter · ≈
0.04 km
TJ
5.96
Eccentricity · e
0.2347

Orbit and dynamics

Between its closest point (0.778 AU) and its farthest (1.256 AU), the heliocentric distance changes by 0.478 AU over every revolution.

One full revolution takes 1.03 yr (375 days), computed from the semi-major axis of 1.017 AU.

An eccentricity of 0.235 makes the orbit moderately elongated.

The orbital plane is tilted 11.62° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 37.5 km/s at perihelion and falls to 23.3 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 = 24.99 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.04 km.

Observation record and orbit quality

Astrometry from 21 individual observations underpins this orbit; the fit leaves an RMS residual of 0.4531 arcseconds.

Condition code U = 7 signals a poorly constrained orbit, so its future path should be treated as provisional.

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
1.017 AU
Eccentricity
0.2347
Perihelion
0.778 AU
Aphelion
1.25569 AU
Inclination
11.62°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
57.08°

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
2053-Oct-12 21:06 0.275795 AU
41258399 km
19.85 km/s
2054-Oct-21 18:03 0.136563 AU
20429492 km
15.50 km/s
2062-May-19 17:54 0.034647 AU
5183099 km
9.10 km/s
2063-May-24 01:05 0.035134 AU
5256046 km
12.94 km/s
2064-May-29 08:50 0.118208 AU
17683608 km
17.25 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
24.99

Orbit Quality

RMS
0.45312
Condition
7
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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