SpaceAtlas Space Object Data
NASA JPL SBDB · 141498

141498

141498 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.922 AU and a period of 0.88 yr.

Aten Observations: 695
Orbital Period · P
0.88 yr
v(q)
59 km/s
v(Q)
16.3 km/s
Diameter · ≈
0.73 km
TJ
6.25
Eccentricity · e
0.5666

Orbit and dynamics

Between its closest point (0.399 AU) and its farthest (1.444 AU), the heliocentric distance changes by 1.045 AU over every revolution.

One full revolution takes 0.88 yr (323 days), computed from the semi-major axis of 0.922 AU.

The high eccentricity (0.567) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

A steep inclination of 30.14° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 59 km/s at perihelion and falls to 16.3 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 = 18.44 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.73 km.

Observation record and orbit quality

Astrometry from 695 individual observations underpins this orbit; the fit leaves an RMS residual of 0.5684 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
0.9216 AU
Eccentricity
0.5666
Perihelion
0.399 AU
Aphelion
1.443779 AU
Inclination
30.14°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
278.0°

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
2033-Nov-30 17:20 0.184203 AU
27556376 km
20.10 km/s
2056-Nov-30 13:03 0.180352 AU
26980271 km
20.34 km/s
2079-Dec-01 08:59 0.176988 AU
26476967 km
20.65 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
18.44

Orbit Quality

RMS
0.56839
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.

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