SpaceAtlas Space Object Data
NASA JPL SBDB · 354182

354182

354182 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.145 AU it takes 1.23 yr to circle the Sun.

Apollo Observations: 286
Orbital Period · P
1.23 yr
v(q)
35.5 km/s
v(Q)
21.8 km/s
Diameter · ≈
0.25 km
TJ
5.45
Eccentricity · e
0.2382

Orbit and dynamics

The path is an ellipse reaching 0.873 AU from the Sun at perihelion and 1.418 AU at aphelion, a radial span of 0.545 AU.

Applying Kepler's third law to a = 1.145 AU gives an orbital period of 1.23 yr, or about 448 days.

An eccentricity of 0.238 makes the orbit moderately elongated.

The orbital plane is tilted 8.71° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 35.5 km/s at perihelion and falls to 21.8 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 = 20.77 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.25 km.

Observation record and orbit quality

The current orbit solution is based on 286 observations and has a weighted RMS residual of 0.4987 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
1.145 AU
Eccentricity
0.2382
Perihelion
0.873 AU
Aphelion
1.417739 AU
Inclination
8.71°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
224.76°

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
2029-Mar-12 16:19 0.095614 AU
14303602 km
10.81 km/s
2035-Aug-28 13:50 0.181256 AU
27115548 km
12.30 km/s
2040-Mar-27 01:24 0.071856 AU
10749540 km
6.77 km/s
2051-Jun-07 17:15 0.196861 AU
29449994 km
6.26 km/s
2062-Aug-23 04:48 0.090093 AU
13477744 km
7.88 km/s
2067-Mar-14 12:05 0.077277 AU
11560411 km
10.32 km/s
2073-Aug-28 22:36 0.196346 AU
29372883 km
12.78 km/s
2078-Mar-29 17:05 0.083527 AU
12495535 km
6.56 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
20.77

Orbit Quality

RMS
0.4987
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.