SpaceAtlas Space Object Data
NASA JPL SBDB · 2017 YW5

2017 YW5

2017 YW5 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.27 AU it takes 1.43 yr to circle the Sun.

Apollo Observations: 41
Orbital Period · P
1.43 yr
v(q)
36.5 km/s
v(Q)
19.1 km/s
Diameter · ≈
0.09 km
TJ
5.03
Eccentricity · e
0.3119

Orbit and dynamics

The path is an ellipse reaching 0.874 AU from the Sun at perihelion and 1.666 AU at aphelion, a radial span of 0.792 AU.

Applying Kepler's third law to a = 1.27 AU gives an orbital period of 1.43 yr, or about 523 days.

An eccentricity of 0.312 makes the orbit moderately elongated.

The orbital plane is tilted 6.77° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 36.5 km/s at perihelion and falls to 19.1 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 = 23 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.09 km.

Observation record and orbit quality

The current orbit solution is based on 41 observations and has a weighted RMS residual of 0.5012 arcseconds.

Condition code U = 4 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
1.27 AU
Eccentricity
0.3119
Perihelion
0.874 AU
Aphelion
1.666113 AU
Inclination
6.77°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
268.76°

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-Mar-28 10:09 0.123599 AU
18490088 km
7.69 km/s
2037-Dec-13 19:04 0.384471 AU
57515994 km
5.97 km/s
2038-May-04 04:38 0.108808 AU
16277420 km
7.31 km/s
2047-Nov-29 22:43 0.453446 AU
67834535 km
7.59 km/s
2048-May-30 08:44 0.114744 AU
17165441 km
9.43 km/s
2051-Jan-05 22:14 0.361669 AU
54104951 km
18.45 km/s
2058-Jun-13 07:51 0.230610 AU
34498789 km
13.98 km/s
2061-Jan-15 08:42 0.203822 AU
30491363 km
13.35 km/s
2068-Jun-22 16:31 0.386572 AU
57830344 km
18.85 km/s
2071-Feb-01 12:26 0.096684 AU
14463670 km
8.43 km/s
2071-Jul-23 09:01 0.434647 AU
65022266 km
6.78 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
23.0

Orbit Quality

RMS
0.50123
Condition
4
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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