SpaceAtlas Space Object Data
NASA JPL SBDB · 497113

497113

497113 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.25 AU it takes 1.40 yr to circle the Sun.

Apollo Observations: 262
Orbital Period · P
1.40 yr
v(q)
34.4 km/s
v(Q)
20.6 km/s
Diameter · ≈
0.12 km
TJ
5.09
Eccentricity · e
0.2507

Orbit and dynamics

The path is an ellipse reaching 0.936 AU from the Sun at perihelion and 1.563 AU at aphelion, a radial span of 0.627 AU.

Applying Kepler's third law to a = 1.25 AU gives an orbital period of 1.40 yr, or about 510 days.

An eccentricity of 0.251 makes the orbit moderately elongated.

The orbital plane is tilted 11.64° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 34.4 km/s at perihelion and falls to 20.6 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 = 22.29 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.12 km.

Observation record and orbit quality

The current orbit solution is based on 262 observations and has a weighted RMS residual of 0.4075 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
1.25 AU
Eccentricity
0.2507
Perihelion
0.936 AU
Aphelion
1.563375 AU
Inclination
11.64°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
8.74°

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
2078-Mar-07 23:24 0.113338 AU
16955091 km
10.54 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
22.29

Orbit Quality

RMS
0.40749
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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