SpaceAtlas Space Object Data
NASA JPL SBDB · 516435

516435

516435 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.913 AU and a period of 0.87 yr.

Aten Observations: 170
Orbital Period · P
0.87 yr
v(q)
44.9 km/s
v(Q)
21.6 km/s
Diameter · ≈
0.19 km
TJ
6.35
Eccentricity · e
0.3492

Orbit and dynamics

Between its closest point (0.594 AU) and its farthest (1.232 AU), the heliocentric distance changes by 0.638 AU over every revolution.

One full revolution takes 0.87 yr (319 days), computed from the semi-major axis of 0.913 AU.

An eccentricity of 0.349 makes the orbit moderately elongated.

A steep inclination of 33.44° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 44.9 km/s at perihelion and falls to 21.6 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

No direct size measurement is available; from an absolute magnitude of H = 21.4 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.19 km.

Observation record and orbit quality

Astrometry from 170 individual observations underpins this orbit; the fit leaves an RMS residual of 0.4187 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
0.9132 AU
Eccentricity
0.3492
Perihelion
0.594 AU
Aphelion
1.232089 AU
Inclination
33.44°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
265.79°

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
2045-Mar-30 12:58 0.174788 AU
26147847 km
19.17 km/s
2052-Mar-30 15:39 0.135038 AU
20201336 km
17.94 km/s
2059-Apr-01 18:48 0.141774 AU
21209161 km
17.12 km/s
2066-Apr-03 21:35 0.185750 AU
27787849 km
16.69 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
21.4

Orbit Quality

RMS
0.41871
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

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