SpaceAtlas Space Object Data
NASA JPL SBDB · 2019 RO1

2019 RO1

2019 RO1 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.981 AU and a period of 0.97 yr.

Aten Observations: 17
Orbital Period · P
0.97 yr
v(q)
41.3 km/s
v(Q)
21.9 km/s
Diameter · ≈
0.02 km
TJ
6.07
Eccentricity · e
0.3073

Orbit and dynamics

The path is an ellipse reaching 0.68 AU from the Sun at perihelion and 1.283 AU at aphelion, a radial span of 0.603 AU.

Applying Kepler's third law to a = 0.981 AU gives an orbital period of 0.97 yr, or about 355 days.

An eccentricity of 0.307 makes the orbit moderately elongated.

A steep inclination of 21.45° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 41.3 km/s at perihelion and falls to 21.9 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 = 26.8 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 17 observations and has a weighted RMS residual of 0.6389 arcseconds.

Condition code U = 8 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
0.9813 AU
Eccentricity
0.3073
Perihelion
0.68 AU
Aphelion
1.282853 AU
Inclination
21.45°
Orbital Period
— yr
Epoch
2458732.5
Mean Anomaly
82.11°

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
2062-Jan-29 12:03 0.202218 AU
30251413 km
18.82 km/s
2063-Jan-18 13:41 0.362021 AU
54157500 km
23.08 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
26.8

Orbit Quality

RMS
0.63888
Condition
8
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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