SpaceAtlas Space Object Data
NASA JPL SBDB · 2023 RL9

2023 RL9

2023 RL9 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.373 AU once every 1.61 yr.

Amor Observations: 19
Orbital Period · P
1.61 yr
v(q)
30.8 km/s
v(Q)
21 km/s
Diameter · ≈
0.07 km
TJ
4.79
Eccentricity · e
0.1898

Orbit and dynamics

The path is an ellipse reaching 1.112 AU from the Sun at perihelion and 1.634 AU at aphelion, a radial span of 0.522 AU.

Applying Kepler's third law to a = 1.373 AU gives an orbital period of 1.61 yr, or about 588 days.

An eccentricity of 0.19 makes the orbit moderately elongated.

The orbital plane is tilted 9.17° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 30.8 km/s at perihelion and falls to 21 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 = 23.49 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.07 km.

Observation record and orbit quality

The current orbit solution is based on 19 observations and has a weighted RMS residual of 0.4876 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
1.373 AU
Eccentricity
0.1898
Perihelion
1.112 AU
Aphelion
1.633595 AU
Inclination
9.17°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
230.97°

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
2031-Aug-04 23:38 0.310382 AU
46432538 km
4.67 km/s
2037-Jan-25 02:26 0.453995 AU
67916706 km
7.37 km/s
2039-Jul-01 17:28 0.444321 AU
66469475 km
5.34 km/s
2045-Jan-01 21:56 0.367653 AU
55000081 km
5.43 km/s
2052-Sep-28 07:48 0.241213 AU
36084944 km
6.73 km/s
2060-Sep-11 01:57 0.138123 AU
20662832 km
4.82 km/s
2068-Aug-12 08:55 0.274481 AU
41061709 km
4.68 km/s
2074-Jan-29 06:21 0.460048 AU
68822205 km
7.63 km/s
2076-Jul-06 07:30 0.411893 AU
61618311 km
5.18 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
23.49

Orbit Quality

RMS
0.48759
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.

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