SpaceAtlas Space Object Data
NASA JPL SBDB · 2018 JF1

2018 JF1

2018 JF1 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.64 AU it takes 2.10 yr to circle the Sun.

Apollo Observations: 48
Orbital Period · P
2.10 yr
v(q)
52.6 km/s
v(Q)
10.3 km/s
Diameter · ≈
0.1 km
TJ
4
Eccentricity · e
0.6726

Orbit and dynamics

Between its closest point (0.537 AU) and its farthest (2.743 AU), the heliocentric distance changes by 2.206 AU over every revolution.

One full revolution takes 2.10 yr (767 days), computed from the semi-major axis of 1.64 AU.

The high eccentricity (0.673) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 6.79° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 52.6 km/s at perihelion and falls to 10.3 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 = 22.7 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.1 km.

Observation record and orbit quality

Astrometry from 48 individual observations underpins this orbit; the fit leaves an RMS residual of 0.4566 arcseconds.

Condition code U = 9 signals a poorly constrained orbit, so its future path should be treated as provisional.

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
1.64 AU
Eccentricity
0.6726
Perihelion
0.537 AU
Aphelion
2.743064 AU
Inclination
6.79°
Orbital Period
— yr
Epoch
2458248.5
Mean Anomaly
26.72°

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
2039-May-03 05:45 0.046166 AU
6906316 km
24.88 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
22.7

Orbit Quality

RMS
0.45657
Condition
9
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.

Keep exploring

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