SpaceAtlas Space Object Data
NASA JPL SBDB · 2012 YJ7

2012 YJ7

2012 YJ7 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.615 AU it takes 2.05 yr to circle the Sun.

Apollo Observations: 45
Orbital Period · P
2.05 yr
v(q)
48.9 km/s
v(Q)
11.2 km/s
Diameter · ≈
0.12 km
TJ
4.09
Eccentricity · e
0.6259

Orbit and dynamics

The path is an ellipse reaching 0.604 AU from the Sun at perihelion and 2.626 AU at aphelion, a radial span of 2.022 AU.

Applying Kepler's third law to a = 1.615 AU gives an orbital period of 2.05 yr, or about 750 days.

The high eccentricity (0.626) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

Its inclination of 4.01° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 48.9 km/s at perihelion and falls to 11.2 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 = 22.43 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.12 km.

Observation record and orbit quality

The current orbit solution is based on 45 observations and has a weighted RMS residual of 0.3774 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
1.615 AU
Eccentricity
0.6259
Perihelion
0.604 AU
Aphelion
2.625829 AU
Inclination
4.01°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
171.75°

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
2052-Jan-03 13:31 0.196065 AU
29330936 km
24.93 km/s
2054-Jan-21 18:13 0.133032 AU
19901341 km
15.07 km/s
2056-Mar-12 09:45 0.358633 AU
53650680 km
16.73 km/s
2058-Apr-19 20:27 0.403064 AU
60297588 km
19.13 km/s
2060-Jun-01 07:42 0.327043 AU
48924942 km
14.41 km/s
2062-Jul-15 11:15 0.056230 AU
8411866 km
17.41 km/s
2064-Jul-31 06:27 0.251371 AU
37604564 km
26.36 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
22.43

Orbit Quality

RMS
0.37741
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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