SpaceAtlas Space Object Data
NASA JPL SBDB · 2018 BJ5

2018 BJ5

2018 BJ5 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.097 AU once every 1.15 yr.

Amor Observations: 98
Orbital Period · P
1.15 yr
v(q)
29.1 km/s
v(Q)
27.8 km/s
Diameter · ≈
0.16 km
TJ
5.59
Eccentricity · e
0.0235

Orbit and dynamics

The path is an ellipse reaching 1.071 AU from the Sun at perihelion and 1.123 AU at aphelion, a radial span of 0.052 AU.

Applying Kepler's third law to a = 1.097 AU gives an orbital period of 1.15 yr, or about 420 days.

With e = 0.024, the orbit is close to circular.

A steep inclination of 22.51° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 29.1 km/s at perihelion and falls to 27.8 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 = 21.73 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.16 km.

Observation record and orbit quality

The current orbit solution is based on 98 observations and has a weighted RMS residual of 0.5011 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
1.097 AU
Eccentricity
0.0235
Perihelion
1.071 AU
Aphelion
1.12278 AU
Inclination
22.51°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
3.57°

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
2033-Jul-24 07:24 0.079910 AU
11954345 km
11.42 km/s
2041-Jan-24 06:00 0.118485 AU
17725063 km
11.66 km/s
2056-Jul-24 14:33 0.093405 AU
13973216 km
11.33 km/s
2064-Jan-27 12:28 0.158125 AU
23655143 km
12.06 km/s
2072-Jan-19 23:14 0.174310 AU
26076403 km
11.80 km/s
2079-Jul-26 11:16 0.180034 AU
26932659 km
11.80 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
21.73

Orbit Quality

RMS
0.50115
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.

Keep exploring

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