SpaceAtlas Space Object Data
NASA JPL SBDB · 2023 BY4

2023 BY4

2023 BY4 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.881 AU it takes 2.58 yr to circle the Sun.

Apollo Observations: 33
Orbital Period · P
2.58 yr
v(q)
39.5 km/s
v(Q)
11.9 km/s
Diameter · ≈
0.04 km
TJ
3.78
Eccentricity · e
0.5358

Orbit and dynamics

Between its closest point (0.873 AU) and its farthest (2.889 AU), the heliocentric distance changes by 2.016 AU over every revolution.

One full revolution takes 2.58 yr (942 days), computed from the semi-major axis of 1.881 AU.

The high eccentricity (0.536) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

Its inclination of 3.15° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 39.5 km/s at perihelion and falls to 11.9 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 = 24.75 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.04 km.

Observation record and orbit quality

Astrometry from 33 individual observations underpins this orbit; the fit leaves an RMS residual of 0.4519 arcseconds.

Condition code U = 8 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
1.881 AU
Eccentricity
0.5358
Perihelion
0.873 AU
Aphelion
2.88884 AU
Inclination
3.15°
Orbital Period
— yr
Epoch
2459971.5
Mean Anomaly
345.13°

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
2072-Jun-02 07:32 0.212481 AU
31786694 km
20.69 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
24.75

Orbit Quality

RMS
0.45194
Condition
8
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

Explore asteroids, comets and near-Earth objects with JPL orbital data.