SpaceAtlas Space Object Data
NASA JPL SBDB · 2006 ST131

2006 ST131

2006 ST131 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.47 AU it takes 1.78 yr to circle the Sun.

Apollo Observations: 61
Orbital Period · P
1.78 yr
v(q)
34.1 km/s
v(Q)
17.7 km/s
Diameter · ≈
0.18 km
TJ
4.39
Eccentricity · e
0.3166

Orbit and dynamics

Between its closest point (1.004 AU) and its farthest (1.935 AU), the heliocentric distance changes by 0.931 AU over every revolution.

One full revolution takes 1.78 yr (651 days), computed from the semi-major axis of 1.47 AU.

An eccentricity of 0.317 makes the orbit moderately elongated.

A steep inclination of 32.88° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 34.1 km/s at perihelion and falls to 17.7 km/s at aphelion.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 21.53 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.18 km.

Observation record and orbit quality

Astrometry from 61 individual observations underpins this orbit; the fit leaves an RMS residual of 0.7007 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
1.47 AU
Eccentricity
0.3166
Perihelion
1.004 AU
Aphelion
1.935402 AU
Inclination
32.88°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
325.78°

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
2031-Oct-15 11:35 0.380401 AU
56907232 km
21.77 km/s
2032-Mar-25 19:27 0.378682 AU
56649965 km
16.38 km/s
2038-Oct-11 16:11 0.485536 AU
72635178 km
16.18 km/s
2047-Oct-18 05:09 0.261077 AU
39056531 km
18.58 km/s
2048-Mar-22 17:15 0.299529 AU
44808915 km
17.33 km/s
2063-Oct-17 22:11 0.286477 AU
42856359 km
16.83 km/s
2064-Mar-22 13:22 0.337382 AU
50471688 km
19.51 km/s
2072-Oct-12 21:00 0.454799 AU
68036929 km
23.51 km/s
2073-Mar-28 06:33 0.432133 AU
64646125 km
16.24 km/s
2079-Oct-14 09:39 0.419672 AU
62782053 km
16.23 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
21.53

Orbit Quality

RMS
0.70075
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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