SpaceAtlas Space Object Data
NASA JPL SBDB · 2017 XJ1

2017 XJ1

2017 XJ1 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.4 AU it takes 1.66 yr to circle the Sun.

Apollo Observations: 46
Orbital Period · P
1.66 yr
v(q)
34.3 km/s
v(Q)
18.5 km/s
Diameter · ≈
0.06 km
TJ
4.69
Eccentricity · e
0.3001

Orbit and dynamics

The path is an ellipse reaching 0.98 AU from the Sun at perihelion and 1.82 AU at aphelion, a radial span of 0.84 AU.

Applying Kepler's third law to a = 1.4 AU gives an orbital period of 1.66 yr, or about 605 days.

An eccentricity of 0.3 makes the orbit moderately elongated.

The orbital plane is tilted 12.08° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 34.3 km/s at perihelion and falls to 18.5 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 = 23.71 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.06 km.

Observation record and orbit quality

The current orbit solution is based on 46 observations and has a weighted RMS residual of 0.3718 arcseconds.

Condition code U = 6 indicates a moderately constrained orbit; predictions decades ahead still carry noticeable uncertainty.

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
1.4 AU
Eccentricity
0.3001
Perihelion
0.98 AU
Aphelion
1.82014 AU
Inclination
12.08°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
16.41°

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
2027-Dec-07 07:29 0.238258 AU
35642921 km
14.85 km/s
2028-May-02 05:19 0.403339 AU
60338601 km
6.93 km/s
2032-Nov-26 16:48 0.415008 AU
62084377 km
20.23 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
23.71

Orbit Quality

RMS
0.37182
Condition
6
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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