SpaceAtlas Space Object Data
NASA JPL SBDB · 523941

523941

523941 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.382 AU it takes 1.62 yr to circle the Sun.

Apollo Observations: 190
Orbital Period · P
1.62 yr
v(q)
35.8 km/s
v(Q)
18 km/s
Diameter · ≈
0.13 km
TJ
4.73
Eccentricity · e
0.3315

Orbit and dynamics

The path is an ellipse reaching 0.924 AU from the Sun at perihelion and 1.84 AU at aphelion, a radial span of 0.916 AU.

Applying Kepler's third law to a = 1.382 AU gives an orbital period of 1.62 yr, or about 593 days.

An eccentricity of 0.332 makes the orbit moderately elongated.

The orbital plane is tilted 7.62° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 35.8 km/s at perihelion and falls to 18 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 = 22.18 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.13 km.

Observation record and orbit quality

The current orbit solution is based on 190 observations and has a weighted RMS residual of 0.513 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
1.382 AU
Eccentricity
0.3315
Perihelion
0.924 AU
Aphelion
1.840133 AU
Inclination
7.62°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
156.08°

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
2037-Jan-21 04:52 0.133511 AU
19972940 km
5.51 km/s
2050-Jan-09 11:17 0.123437 AU
18465963 km
5.53 km/s
2063-Jan-03 22:57 0.115851 AU
17331118 km
5.67 km/s
2076-Jan-03 12:45 0.114637 AU
17149402 km
5.70 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
22.18

Orbit Quality

RMS
0.51299
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

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