SpaceAtlas Space Object Data
NASA JPL SBDB · 2019 LL5

2019 LL5

2019 LL5 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.665 AU and a period of 0.54 yr.

Aten Observations: 73
Orbital Period · P
0.54 yr
v(q)
63.6 km/s
v(Q)
21 km/s
Diameter · ≈
0.69 km
TJ
8.37
Eccentricity · e
0.5032

Orbit and dynamics

The path is an ellipse reaching 0.33 AU from the Sun at perihelion and 0.999 AU at aphelion, a radial span of 0.669 AU.

Applying Kepler's third law to a = 0.665 AU gives an orbital period of 0.54 yr, or about 198 days.

The high eccentricity (0.503) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

A steep inclination of 29.89° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 63.6 km/s at perihelion and falls to 21 km/s at aphelion.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 18.56 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.69 km.

Observation record and orbit quality

The current orbit solution is based on 73 observations and has a weighted RMS residual of 0.5341 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
0.6646 AU
Eccentricity
0.5032
Perihelion
0.33 AU
Aphelion
0.999027 AU
Inclination
29.89°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
48.95°

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-Aug-24 06:56 0.073291 AU
10964177 km
16.90 km/s
2033-Aug-26 00:27 0.192596 AU
28811941 km
15.21 km/s
2040-Aug-23 21:08 0.081369 AU
12172693 km
17.34 km/s
2046-Aug-25 11:23 0.169430 AU
25346431 km
15.18 km/s
2053-Aug-24 18:00 0.101968 AU
15254266 km
18.05 km/s
2059-Aug-24 21:17 0.138372 AU
20700198 km
15.26 km/s
2066-Aug-25 23:35 0.136151 AU
20367947 km
19.06 km/s
2072-Aug-23 14:05 0.104614 AU
15650095 km
15.59 km/s
2079-Aug-27 12:21 0.177661 AU
26577691 km
20.24 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
18.56

Orbit Quality

RMS
0.53405
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.

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