SpaceAtlas Space Object Data
NASA JPL SBDB · 2015 KB57

2015 KB57

2015 KB57 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.945 AU and a period of 0.92 yr.

Aten Observations: 37
Orbital Period · P
0.92 yr
v(q)
62 km/s
v(Q)
15.1 km/s
Diameter · ≈
0.12 km
TJ
6.1
Eccentricity · e
0.6074

Orbit and dynamics

The path is an ellipse reaching 0.371 AU from the Sun at perihelion and 1.518 AU at aphelion, a radial span of 1.147 AU.

Applying Kepler's third law to a = 0.945 AU gives an orbital period of 0.92 yr, or about 335 days.

The high eccentricity (0.607) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

A steep inclination of 29.67° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 62 km/s at perihelion and falls to 15.1 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 = 22.37 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.12 km.

Observation record and orbit quality

The current orbit solution is based on 37 observations and has a weighted RMS residual of 0.6216 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
0.9446 AU
Eccentricity
0.6074
Perihelion
0.371 AU
Aphelion
1.51835 AU
Inclination
29.67°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
104.56°

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
22.37

Orbit Quality

RMS
0.62164
Condition
0
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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