SpaceAtlas Space Object Data
NASA JPL SBDB · 264993

264993

264993 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.375 AU it takes 1.61 yr to circle the Sun.

Apollo Observations: 453
Orbital Period · P
1.61 yr
v(q)
39.3 km/s
v(Q)
16.4 km/s
Diameter · ≈
0.29 km
TJ
4.72
Eccentricity · e
0.4109

Orbit and dynamics

The path is an ellipse reaching 0.81 AU from the Sun at perihelion and 1.94 AU at aphelion, a radial span of 1.13 AU.

Applying Kepler's third law to a = 1.375 AU gives an orbital period of 1.61 yr, or about 589 days.

The high eccentricity (0.411) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

Its inclination of 3.15° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 39.3 km/s at perihelion and falls to 16.4 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 = 20.44 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.29 km.

Observation record and orbit quality

The current orbit solution is based on 453 observations and has a weighted RMS residual of 0.5099 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
1.375 AU
Eccentricity
0.4109
Perihelion
0.81 AU
Aphelion
1.939987 AU
Inclination
3.15°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
102.15°

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
2040-Aug-21 00:25 0.056458 AU
8445934 km
11.71 km/s
2053-Apr-25 06:42 0.148504 AU
22215938 km
8.72 km/s
2061-Jul-19 01:17 0.162696 AU
24339018 km
8.75 km/s
2074-Mar-24 07:22 0.074807 AU
11190963 km
13.20 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
20.44

Orbit Quality

RMS
0.50987
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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