SpaceAtlas Space Object Data
NASA JPL SBDB · 2023 SL8

2023 SL8

2023 SL8 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.29 AU it takes 1.47 yr to circle the Sun.

Apollo Observations: 272
Orbital Period · P
1.47 yr
v(q)
37.7 km/s
v(Q)
18.2 km/s
Diameter · ≈
0.05 km
TJ
4.94
Eccentricity · e
0.3484

Orbit and dynamics

Between its closest point (0.841 AU) and its farthest (1.739 AU), the heliocentric distance changes by 0.898 AU over every revolution.

One full revolution takes 1.47 yr (535 days), computed from the semi-major axis of 1.29 AU.

An eccentricity of 0.348 makes the orbit moderately elongated.

The orbital plane is tilted 14.88° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 37.7 km/s at perihelion and falls to 18.2 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 = 24.4 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.05 km.

Observation record and orbit quality

Astrometry from 272 individual observations underpins this orbit; the fit leaves an RMS residual of 0.316 arcseconds.

Condition code U = 6 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
1.29 AU
Eccentricity
0.3484
Perihelion
0.841 AU
Aphelion
1.739436 AU
Inclination
14.88°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
336.11°

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
2029-Apr-19 13:23 0.240888 AU
36036378 km
17.45 km/s
2042-Oct-15 02:18 0.216991 AU
32461344 km
19.66 km/s
2045-Mar-29 16:52 0.413505 AU
61859486 km
9.79 km/s
2048-Apr-26 12:44 0.150559 AU
22523349 km
10.80 km/s
2051-Apr-13 22:29 0.322241 AU
48206522 km
22.00 km/s
2064-Oct-05 16:01 0.004714 AU
705234 km
14.92 km/s
2070-Apr-23 14:48 0.150521 AU
22517595 km
14.70 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
24.4

Orbit Quality

RMS
0.31599
Condition
6
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.