SpaceAtlas Space Object Data
NASA JPL SBDB · 2017 YK1

2017 YK1

2017 YK1 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.937 AU and a period of 0.91 yr.

Aten Observations: 30
Orbital Period · P
0.91 yr
v(q)
37.7 km/s
v(Q)
25.1 km/s
Diameter · ≈
0.04 km
TJ
6.29
Eccentricity · e
0.2011

Orbit and dynamics

The path is an ellipse reaching 0.748 AU from the Sun at perihelion and 1.125 AU at aphelion, a radial span of 0.377 AU.

Applying Kepler's third law to a = 0.937 AU gives an orbital period of 0.91 yr, or about 331 days.

An eccentricity of 0.201 makes the orbit moderately elongated.

A steep inclination of 27.51° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 37.7 km/s at perihelion and falls to 25.1 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 = 24.9 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.04 km.

Observation record and orbit quality

The current orbit solution is based on 30 observations and has a weighted RMS residual of 0.5138 arcseconds.

Condition code U = 8 signals a poorly constrained orbit, so its future path should be treated as provisional.

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
0.9367 AU
Eccentricity
0.2011
Perihelion
0.748 AU
Aphelion
1.12507 AU
Inclination
27.51°
Orbital Period
— yr
Epoch
2458109.5
Mean Anomaly
121.56°

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

Predicted close approaches to Earth, from NASA's Center for Near-Earth Object Studies (CNEOS).

Date (UTC)Miss distanceVelocity
2026-Dec-25 03:13 0.188969 AU
28269311 km
20.46 km/s
2027-Dec-28 00:35 0.127686 AU
19101627 km
14.02 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
24.9

Orbit Quality

RMS
0.51376
Condition
8
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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