SpaceAtlas Space Object Data
NASA JPL SBDB · 2011 BY24

2011 BY24

2011 BY24 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.891 AU it takes 2.60 yr to circle the Sun.

Apollo Observations: 35
Orbital Period · P
2.60 yr
v(q)
37.1 km/s
v(Q)
12.6 km/s
Diameter · ≈
0.09 km
TJ
3.77
Eccentricity · e
0.492

Orbit and dynamics

The path is an ellipse reaching 0.96 AU from the Sun at perihelion and 2.821 AU at aphelion, a radial span of 1.861 AU.

Applying Kepler's third law to a = 1.891 AU gives an orbital period of 2.60 yr, or about 950 days.

The high eccentricity (0.492) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 13.96° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 37.1 km/s at perihelion and falls to 12.6 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 0.2 km, a value from direct size determination rather than from brightness alone.

Its geometric albedo of 0.042 indicates a very dark, carbonaceous-type surface.

Observation record and orbit quality

The current orbit solution is based on 35 observations and has a weighted RMS residual of 0.3667 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
1.891 AU
Eccentricity
0.492
Perihelion
0.96 AU
Aphelion
2.821372 AU
Inclination
13.96°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
317.23°

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
0.195 km
Albedo
0.042
Density
— g/cm³
Rotation Period
— h
Absolute Magnitude
22.88

Orbit Quality

RMS
0.36668
Condition
0
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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