SpaceAtlas Space Object Data
NASA JPL SBDB · 2017 KS31

2017 KS31

2017 KS31 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.498 AU once every 1.83 yr.

Amor Observations: 48
Orbital Period · P
1.83 yr
v(q)
33 km/s
v(Q)
18 km/s
Diameter · ≈
0.16 km
TJ
4.49
Eccentricity · e
0.2951

Orbit and dynamics

Between its closest point (1.056 AU) and its farthest (1.94 AU), the heliocentric distance changes by 0.884 AU over every revolution.

One full revolution takes 1.83 yr (670 days), computed from the semi-major axis of 1.498 AU.

An eccentricity of 0.295 makes the orbit moderately elongated.

The orbital plane is tilted 6.8° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 33 km/s at perihelion and falls to 18 km/s at aphelion.

Its perihelion lies just outside Earth's orbit, which is why it is classed as Earth-approaching rather than Earth-crossing.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 21.74 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.16 km.

Observation record and orbit quality

Astrometry from 48 individual observations underpins this orbit; the fit leaves an RMS residual of 0.4786 arcseconds.

Condition code U = 1 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
1.498 AU
Eccentricity
0.2951
Perihelion
1.056 AU
Aphelion
1.94006 AU
Inclination
6.8°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
298.52°

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
2028-Jul-03 23:57 0.142720 AU
21350612 km
6.93 km/s
2039-Jul-04 16:26 0.143691 AU
21495830 km
6.99 km/s
2050-Jul-01 10:53 0.173473 AU
25951142 km
8.22 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
21.74

Orbit Quality

RMS
0.47856
Condition
1
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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