SpaceAtlas Space Object Data
NASA JPL SBDB · 2012 YL7

2012 YL7

2012 YL7 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.471 AU once every 1.78 yr.

Amor Observations: 42
Orbital Period · P
1.78 yr
v(q)
32.6 km/s
v(Q)
18.5 km/s
Diameter · ≈
0.1 km
TJ
4.56
Eccentricity · e
0.2756

Orbit and dynamics

The path is an ellipse reaching 1.066 AU from the Sun at perihelion and 1.876 AU at aphelion, a radial span of 0.81 AU.

Applying Kepler's third law to a = 1.471 AU gives an orbital period of 1.78 yr, or about 652 days.

An eccentricity of 0.276 makes the orbit moderately elongated.

Its inclination of 2.39° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 32.6 km/s at perihelion and falls to 18.5 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 = 22.74 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.1 km.

Observation record and orbit quality

The current orbit solution is based on 42 observations and has a weighted RMS residual of 0.6294 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
1.471 AU
Eccentricity
0.2756
Perihelion
1.066 AU
Aphelion
1.876408 AU
Inclination
2.39°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
177.28°

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-Oct-27 03:07 0.431180 AU
64503611 km
4.71 km/s
2038-Jan-22 17:09 0.086632 AU
12959945 km
2.71 km/s
2047-Jan-04 03:45 0.463615 AU
69355798 km
12.88 km/s
2047-Apr-06 09:31 0.398509 AU
59616170 km
3.85 km/s
2053-Oct-31 23:40 0.409592 AU
61274069 km
4.24 km/s
2054-Feb-14 16:32 0.481890 AU
72089743 km
14.54 km/s
2063-Jan-22 19:19 0.084914 AU
12703004 km
2.60 km/s
2072-Jan-02 21:01 0.473521 AU
70837711 km
13.34 km/s
2072-Apr-07 05:21 0.404276 AU
60478874 km
3.97 km/s
2078-Nov-02 12:11 0.404561 AU
60521424 km
4.15 km/s
2079-Feb-15 09:09 0.472305 AU
70655766 km
14.31 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
22.74

Orbit Quality

RMS
0.62943
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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