SpaceAtlas Space Object Data
NASA JPL SBDB · 2014 YM9

2014 YM9

2014 YM9 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.903 AU once every 2.63 yr.

Amor Observations: 379
Orbital Period · P
2.63 yr
v(q)
35.1 km/s
v(Q)
13.3 km/s
Diameter · ≈
0.49 km
TJ
3.75
Eccentricity · e
0.4519

Orbit and dynamics

The path is an ellipse reaching 1.043 AU from the Sun at perihelion and 2.763 AU at aphelion, a radial span of 1.72 AU.

Applying Kepler's third law to a = 1.903 AU gives an orbital period of 2.63 yr, or about 959 days.

The high eccentricity (0.452) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 19.66° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 35.1 km/s at perihelion and falls to 13.3 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 = 19.3 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.49 km.

Observation record and orbit quality

The current orbit solution is based on 379 observations and has a weighted RMS residual of 0.2909 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
1.903 AU
Eccentricity
0.4519
Perihelion
1.043 AU
Aphelion
2.762966 AU
Inclination
19.66°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
102.8°

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
2036-Feb-15 07:38 0.124176 AU
18576498 km
11.83 km/s
2057-Feb-18 22:42 0.182736 AU
27336960 km
11.47 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
19.3

Orbit Quality

RMS
0.29093
Condition
0
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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