SpaceAtlas Space Object Data
NASA JPL SBDB · 2004 RW10

2004 RW10

2004 RW10 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 2.349 AU it takes 3.60 yr to circle the Sun.

Apollo Observations: 81
Orbital Period · P
3.60 yr
v(q)
38.6 km/s
v(Q)
9.8 km/s
Diameter · ≈
0.22 km
TJ
3.29
Eccentricity · e
0.5951

Orbit and dynamics

The path is an ellipse reaching 0.951 AU from the Sun at perihelion and 3.747 AU at aphelion, a radial span of 2.796 AU.

Applying Kepler's third law to a = 2.349 AU gives an orbital period of 3.60 yr, or about 1,315 days.

The high eccentricity (0.595) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

Its inclination of 3.11° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 38.6 km/s at perihelion and falls to 9.8 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 = 21.07 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.22 km.

Observation record and orbit quality

The current orbit solution is based on 81 observations and has a weighted RMS residual of 0.6892 arcseconds.

Condition code U = 0 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
2.349 AU
Eccentricity
0.5951
Perihelion
0.951 AU
Aphelion
3.74689 AU
Inclination
3.11°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
22.12°

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
2033-Apr-26 14:52 0.322397 AU
48229971 km
20.53 km/s
2051-May-13 22:30 0.127290 AU
19042278 km
13.93 km/s
2069-Jul-09 01:38 0.078852 AU
11796071 km
9.23 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
21.07

Orbit Quality

RMS
0.68922
Condition
0
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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