SpaceAtlas Space Object Data
NASA JPL SBDB · 274138

274138

274138 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.324 AU it takes 1.52 yr to circle the Sun.

Apollo Observations: 1,181
Orbital Period · P
1.52 yr
v(q)
49.4 km/s
v(Q)
13.6 km/s
Diameter · ≈
0.99 km
TJ
4.74
Eccentricity · e
0.5692

Orbit and dynamics

The path is an ellipse reaching 0.57 AU from the Sun at perihelion and 2.078 AU at aphelion, a radial span of 1.508 AU.

Applying Kepler's third law to a = 1.324 AU gives an orbital period of 1.52 yr, or about 556 days.

The high eccentricity (0.569) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 12.84° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 49.4 km/s at perihelion and falls to 13.6 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

The measured diameter is 0.75 km, a value from direct size determination rather than from brightness alone.

A geometric albedo of 0.24 points to a comparatively bright, reflective surface.

Observation record and orbit quality

The current orbit solution is based on 1,181 observations and has a weighted RMS residual of 0.4072 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
1.324 AU
Eccentricity
0.5692
Perihelion
0.57 AU
Aphelion
2.077621 AU
Inclination
12.84°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
288.12°

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
2026-Nov-14 13:21 0.166297 AU
24877636 km
17.38 km/s
2040-Apr-22 21:00 0.164112 AU
24550830 km
22.58 km/s
2043-May-05 03:11 0.192152 AU
28745503 km
14.45 km/s
2058-Nov-16 13:06 0.160705 AU
24041156 km
18.02 km/s
2072-Apr-21 16:33 0.190664 AU
28522887 km
23.51 km/s
2075-May-03 18:00 0.157352 AU
23539570 km
15.62 km/s

Distances in astronomical units (AU) and kilometres. Source: NASA/JPL CNEOS Close Approach Data API.

Physical Parameters

Diameter
0.747 km
Albedo
0.24
Density
— g/cm³
Rotation Period
— h
Absolute Magnitude
17.77

Orbit Quality

RMS
0.40719
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.