SpaceAtlas Space Object Data
NASA JPL SBDB · 2013 XF22

2013 XF22

2013 XF22 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 2.558 AU once every 4.09 yr.

Amor Observations: 250
Orbital Period · P
4.09 yr
v(q)
34.2 km/s
v(Q)
10.1 km/s
Diameter · ≈
0.5 km
TJ
3.2
Eccentricity · e
0.5433

Orbit and dynamics

The path is an ellipse reaching 1.168 AU from the Sun at perihelion and 3.948 AU at aphelion, a radial span of 2.78 AU.

Applying Kepler's third law to a = 2.558 AU gives an orbital period of 4.09 yr, or about 1,494 days.

The high eccentricity (0.543) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 6.14° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 34.2 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 = 19.24 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.5 km.

Observation record and orbit quality

The current orbit solution is based on 250 observations and has a weighted RMS residual of 0.4083 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
2.558 AU
Eccentricity
0.5433
Perihelion
1.168 AU
Aphelion
3.947761 AU
Inclination
6.14°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
354.61°

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
2059-Feb-18 19:21 0.410057 AU
61343703 km
12.89 km/s
2063-Mar-10 16:32 0.183696 AU
27480548 km
5.06 km/s
2067-Apr-06 17:09 0.373773 AU
55915693 km
11.75 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
19.24

Orbit Quality

RMS
0.40832
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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