SpaceAtlas Space Object Data
NASA JPL SBDB · 2023 RO16

2023 RO16

2023 RO16 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.032 AU it takes 1.05 yr to circle the Sun.

Apollo Observations: 19
Orbital Period · P
1.05 yr
v(q)
30 km/s
v(Q)
28.7 km/s
Diameter · ≈
0.01 km
TJ
5.93
Eccentricity · e
0.0218

Orbit and dynamics

The path is an ellipse reaching 1.01 AU from the Sun at perihelion and 1.054 AU at aphelion, a radial span of 0.044 AU.

Applying Kepler's third law to a = 1.032 AU gives an orbital period of 1.05 yr, or about 383 days.

With e = 0.022, the orbit is close to circular.

Its inclination of 3.17° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 30 km/s at perihelion and falls to 28.7 km/s at aphelion.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 27.86 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.01 km.

Observation record and orbit quality

The current orbit solution is based on 19 observations and has a weighted RMS residual of 0.9006 arcseconds.

Condition code U = 2 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
1.032 AU
Eccentricity
0.0218
Perihelion
1.01 AU
Aphelion
1.054498 AU
Inclination
3.17°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
5.27°

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
2044-Mar-29 03:26 0.236095 AU
35319254 km
7.64 km/s
2045-Feb-16 11:56 0.056773 AU
8493079 km
1.66 km/s
2045-Jul-19 16:05 0.069947 AU
10463946 km
2.52 km/s
2046-Jul-14 04:30 0.381701 AU
57101597 km
11.64 km/s
2063-Mar-30 07:58 0.450870 AU
67449214 km
13.83 km/s
2064-Mar-27 08:03 0.117793 AU
17621628 km
4.36 km/s
2064-Oct-12 19:27 0.072307 AU
10816932 km
1.85 km/s
2065-Jul-06 23:12 0.196651 AU
29418606 km
6.21 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
27.86

Orbit Quality

RMS
0.90064
Condition
2
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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