SpaceAtlas Space Object Data
NASA JPL SBDB · 2024 SY

2024 SY

2024 SY belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.332 AU it takes 1.54 yr to circle the Sun.

Apollo Observations: 21
Orbital Period · P
1.54 yr
v(q)
33.1 km/s
v(Q)
20.1 km/s
Diameter · ≈
0.01 km
TJ
4.87
Eccentricity · e
0.2446

Orbit and dynamics

Between its closest point (1.006 AU) and its farthest (1.658 AU), the heliocentric distance changes by 0.652 AU over every revolution.

One full revolution takes 1.54 yr (561 days), computed from the semi-major axis of 1.332 AU.

An eccentricity of 0.245 makes the orbit moderately elongated.

The orbital plane is tilted 9.51° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 33.1 km/s at perihelion and falls to 20.1 km/s at aphelion.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 27.89 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.01 km.

Observation record and orbit quality

Astrometry from 21 individual observations underpins this orbit; the fit leaves an RMS residual of 0.4552 arcseconds.

Condition code U = 7 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
1.332 AU
Eccentricity
0.2446
Perihelion
1.006 AU
Aphelion
1.657807 AU
Inclination
9.51°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
27.47°

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
2027-Jun-29 08:19 0.433024 AU
64779494 km
5.22 km/s
2027-Nov-27 05:50 0.392517 AU
58719665 km
15.91 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
27.89

Orbit Quality

RMS
0.45516
Condition
7
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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