SpaceAtlas Space Object Data
NASA JPL SBDB · 2018 BF5

2018 BF5

2018 BF5 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.975 AU and a period of 0.96 yr.

Aten Observations: 99
Orbital Period · P
0.96 yr
v(q)
32.9 km/s
v(Q)
27.7 km/s
Diameter · ≈
0.05 km
TJ
6.15
Eccentricity · e
0.0848

Orbit and dynamics

The path is an ellipse reaching 0.892 AU from the Sun at perihelion and 1.058 AU at aphelion, a radial span of 0.166 AU.

Applying Kepler's third law to a = 0.975 AU gives an orbital period of 0.96 yr, or about 352 days.

With e = 0.085, the orbit is close to circular.

The orbital plane is tilted 18.94° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 32.9 km/s at perihelion and falls to 27.7 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 = 24.2 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.05 km.

Observation record and orbit quality

The current orbit solution is based on 99 observations and has a weighted RMS residual of 0.3874 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
0.9751 AU
Eccentricity
0.0848
Perihelion
0.892 AU
Aphelion
1.057788 AU
Inclination
18.94°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
1.02°

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
2042-Jan-27 22:04 0.392316 AU
58689591 km
18.83 km/s
2043-Jan-22 09:55 0.164380 AU
24590883 km
13.36 km/s
2044-Jan-20 00:45 0.021852 AU
3269017 km
10.07 km/s
2044-Aug-05 05:59 0.151683 AU
22691478 km
10.38 km/s
2045-Jan-22 18:39 0.125430 AU
18764030 km
10.74 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
24.2

Orbit Quality

RMS
0.38738
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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