SpaceAtlas Space Object Data
NASA JPL SBDB · 2013 QJ48

2013 QJ48

2013 QJ48 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 2.327 AU once every 3.55 yr.

Amor Observations: 49
Orbital Period · P
3.55 yr
v(q)
31.9 km/s
v(Q)
12 km/s
Diameter · ≈
0.15 km
TJ
3.42
Eccentricity · e
0.4542

Orbit and dynamics

The path is an ellipse reaching 1.27 AU from the Sun at perihelion and 3.384 AU at aphelion, a radial span of 2.114 AU.

Applying Kepler's third law to a = 2.327 AU gives an orbital period of 3.55 yr, or about 1,297 days.

The high eccentricity (0.454) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 5.07° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 31.9 km/s at perihelion and falls to 12 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 = 21.91 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.15 km.

Observation record and orbit quality

The current orbit solution is based on 49 observations and has a weighted RMS residual of 0.6851 arcseconds.

Condition code U = 1 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
2.327 AU
Eccentricity
0.4542
Perihelion
1.27 AU
Aphelion
3.383923 AU
Inclination
5.07°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
218.86°

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
2045-Sep-05 19:45 0.433847 AU
64902644 km
2.33 km/s
2052-Jul-25 05:03 0.421653 AU
63078421 km
2.81 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
21.91

Orbit Quality

RMS
0.68511
Condition
1
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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