SpaceAtlas Space Object Data
NASA JPL SBDB · 2011 YH6

2011 YH6

2011 YH6 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 2.528 AU once every 4.02 yr.

Amor Observations: 150
Orbital Period · P
4.02 yr
v(q)
34.9 km/s
v(Q)
10.1 km/s
Diameter · ≈
0.16 km
TJ
3.2
Eccentricity · e
0.5525

Orbit and dynamics

The path is an ellipse reaching 1.131 AU from the Sun at perihelion and 3.925 AU at aphelion, a radial span of 2.794 AU.

Applying Kepler's third law to a = 2.528 AU gives an orbital period of 4.02 yr, or about 1,468 days.

The high eccentricity (0.552) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 11.12° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 34.9 km/s at perihelion and falls to 10.1 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 = 21.79 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.16 km.

Observation record and orbit quality

The current orbit solution is based on 150 observations and has a weighted RMS residual of 0.5407 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
2.528 AU
Eccentricity
0.5525
Perihelion
1.131 AU
Aphelion
3.92472 AU
Inclination
11.12°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
221.18°

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-Jan-01 12:05 0.499614 AU
74741216 km
17.38 km/s
2060-Jan-07 09:18 0.428248 AU
64064921 km
17.68 km/s
2063-Dec-31 09:05 0.305733 AU
45737080 km
14.16 km/s
2067-Dec-26 19:01 0.193810 AU
28993606 km
11.61 km/s
2071-Dec-09 13:06 0.152991 AU
22887145 km
8.15 km/s
2075-Nov-12 02:52 0.340062 AU
50872573 km
12.27 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
21.79

Orbit Quality

RMS
0.54071
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.

Keep exploring

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