SpaceAtlas Space Object Data
NASA JPL SBDB · 2018 RY5

2018 RY5

2018 RY5 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 2.346 AU it takes 3.59 yr to circle the Sun.

Apollo Observations: 51
Orbital Period · P
3.59 yr
v(q)
52.3 km/s
v(Q)
7.2 km/s
Diameter · ≈
0.02 km
TJ
3.08
Eccentricity · e
0.7569

Orbit and dynamics

The path is an ellipse reaching 0.57 AU from the Sun at perihelion and 4.122 AU at aphelion, a radial span of 3.552 AU.

Applying Kepler's third law to a = 2.346 AU gives an orbital period of 3.59 yr, or about 1,312 days.

The high eccentricity (0.757) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 11.86° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 52.3 km/s at perihelion and falls to 7.2 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 = 26.6 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.02 km.

Observation record and orbit quality

The current orbit solution is based on 51 observations and has a weighted RMS residual of 0.5659 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
2.346 AU
Eccentricity
0.7569
Perihelion
0.57 AU
Aphelion
4.121687 AU
Inclination
11.86°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
65.79°

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
2072-Sep-27 00:23 0.164487 AU
24606850 km
31.76 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
26.6

Orbit Quality

RMS
0.56588
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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