SpaceAtlas Space Object Data
NASA JPL SBDB · 606438

606438

606438 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.605 AU it takes 2.03 yr to circle the Sun.

Apollo Observations: 122
Orbital Period · P
2.03 yr
v(q)
34.6 km/s
v(Q)
16 km/s
Diameter · ≈
0.81 km
TJ
4.16
Eccentricity · e
0.3689

Orbit and dynamics

The path is an ellipse reaching 1.013 AU from the Sun at perihelion and 2.197 AU at aphelion, a radial span of 1.184 AU.

Applying Kepler's third law to a = 1.605 AU gives an orbital period of 2.03 yr, or about 743 days.

An eccentricity of 0.369 makes the orbit moderately elongated.

A steep inclination of 27.11° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 34.6 km/s at perihelion and falls to 16 km/s at aphelion.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 18.2 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.81 km.

Observation record and orbit quality

The current orbit solution is based on 122 observations and has a weighted RMS residual of 0.5658 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
1.605 AU
Eccentricity
0.3689
Perihelion
1.013 AU
Aphelion
2.197084 AU
Inclination
27.11°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
161.93°

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-Oct-15 19:20 0.192720 AU
28830476 km
14.76 km/s
2035-Oct-21 02:03 0.144560 AU
21625898 km
17.03 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
18.2

Orbit Quality

RMS
0.56576
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.

Keep exploring

Explore asteroids, comets and near-Earth objects with JPL orbital data.