SpaceAtlas Space Object Data
NASA JPL SBDB · 2015 BY516

2015 BY516

2015 BY516 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 2.908 AU it takes 4.96 yr to circle the Sun.

Apollo Observations: 27
Orbital Period · P
4.96 yr
v(q)
38.8 km/s
v(Q)
7.9 km/s
Diameter · ≈
0.35 km
TJ
2.88
Eccentricity · e
0.6622

Orbit and dynamics

The path is an ellipse reaching 0.982 AU from the Sun at perihelion and 4.834 AU at aphelion, a radial span of 3.852 AU.

Applying Kepler's third law to a = 2.908 AU gives an orbital period of 4.96 yr, or about 1,811 days.

The high eccentricity (0.662) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 13.45° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 38.8 km/s at perihelion and falls to 7.9 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

The measured diameter is 0.35 km, a value from direct size determination rather than from brightness alone.

Its geometric albedo of 0.017 indicates a very dark, carbonaceous-type surface.

Observation record and orbit quality

The current orbit solution is based on 27 observations and has a weighted RMS residual of 0.3199 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
2.908 AU
Eccentricity
0.6622
Perihelion
0.982 AU
Aphelion
4.833678 AU
Inclination
13.45°
Orbital Period
— yr
Epoch
2457058.5
Mean Anomaly
355.51°

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

No close approaches to Earth are currently on record for this object.

Physical Parameters

Diameter
0.349 km
Albedo
0.017
Density
— g/cm³
Rotation Period
— h
Absolute Magnitude
20.02

Orbit Quality

RMS
0.31987
Condition
8
Orbit ID
—
Data source: NASA JPL Small-Body Database . 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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