SpaceAtlas Space Object Data
NASA JPL SBDB · 2017 WY

2017 WY

2017 WY is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.485 AU once every 1.81 yr.

Amor Observations: 39
Orbital Period · P
1.81 yr
v(q)
33.6 km/s
v(Q)
17.8 km/s
Diameter · ≈
0.09 km
TJ
4.47
Eccentricity · e
0.3085

Orbit and dynamics

Between its closest point (1.027 AU) and its farthest (1.943 AU), the heliocentric distance changes by 0.916 AU over every revolution.

One full revolution takes 1.81 yr (661 days), computed from the semi-major axis of 1.485 AU.

An eccentricity of 0.308 makes the orbit moderately elongated.

The orbital plane is tilted 18.31° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 33.6 km/s at perihelion and falls to 17.8 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 = 22.9 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.09 km.

Observation record and orbit quality

Astrometry from 39 individual observations underpins this orbit; the fit leaves an RMS residual of 0.5003 arcseconds.

Condition code U = 6 indicates a moderately constrained orbit; predictions decades ahead still carry noticeable uncertainty.

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
1.485 AU
Eccentricity
0.3085
Perihelion
1.027 AU
Aphelion
1.943123 AU
Inclination
18.31°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
220.09°

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-Nov-12 11:59 0.459640 AU
68761101 km
9.54 km/s
2037-Nov-27 17:51 0.390081 AU
58355310 km
18.98 km/s
2038-Apr-26 04:48 0.428817 AU
64150167 km
9.83 km/s
2046-Dec-05 05:14 0.166470 AU
24903580 km
12.51 km/s
2047-Apr-07 11:59 0.330615 AU
49459238 km
8.89 km/s
2055-Dec-02 23:18 0.202522 AU
30296851 km
9.61 km/s
2056-Mar-22 05:53 0.330808 AU
49488124 km
10.90 km/s
2064-Nov-12 13:40 0.397838 AU
59515728 km
9.54 km/s
2075-Nov-28 05:49 0.323170 AU
48345511 km
19.16 km/s
2076-Apr-26 09:12 0.406086 AU
60749641 km
9.86 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
22.9

Orbit Quality

RMS
0.50029
Condition
6
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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