SpaceAtlas Space Object Data
NASA JPL SBDB · 2017 RB

2017 RB

2017 RB belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.147 AU it takes 1.23 yr to circle the Sun.

Apollo Observations: 20
Orbital Period · P
1.23 yr
v(q)
32.3 km/s
v(Q)
23.9 km/s
Diameter · ≈
0.01 km
TJ
5.46
Eccentricity · e
0.1486

Orbit and dynamics

The path is an ellipse reaching 0.977 AU from the Sun at perihelion and 1.317 AU at aphelion, a radial span of 0.34 AU.

Applying Kepler's third law to a = 1.147 AU gives an orbital period of 1.23 yr, or about 449 days.

An eccentricity of 0.149 makes the orbit moderately elongated.

The orbital plane is tilted 7.85° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 32.3 km/s at perihelion and falls to 23.9 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 = 28.1 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 20 observations and has a weighted RMS residual of 0.3943 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
1.147 AU
Eccentricity
0.1486
Perihelion
0.977 AU
Aphelion
1.317444 AU
Inclination
7.85°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
10.9°

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

No close approaches to Earth are currently on record for this object.

Physical Parameters

Diameter
— km
Albedo
—
Density
— g/cm³
Rotation Period
— h
Absolute Magnitude
28.1

Orbit Quality

RMS
0.3943
Condition
6
Orbit ID
—
Data source: NASA JPL Small-Body Database . 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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