SpaceAtlas Space Object Data
NASA JPL SBDB · 514914

514914

514914 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.823 AU it takes 2.46 yr to circle the Sun.

Apollo Observations: 68
Orbital Period · P
2.46 yr
v(q)
46.6 km/s
v(Q)
10.4 km/s
Diameter · ≈
0.34 km
TJ
3.76
Eccentricity · e
0.6341

Orbit and dynamics

Between its closest point (0.667 AU) and its farthest (2.979 AU), the heliocentric distance changes by 2.312 AU over every revolution.

One full revolution takes 2.46 yr (899 days), computed from the semi-major axis of 1.823 AU.

The high eccentricity (0.634) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 9.42° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 46.6 km/s at perihelion and falls to 10.4 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 = 20.09 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.34 km.

Observation record and orbit quality

Astrometry from 68 individual observations underpins this orbit; the fit leaves an RMS residual of 0.5637 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
1.823 AU
Eccentricity
0.6341
Perihelion
0.667 AU
Aphelion
2.978964 AU
Inclination
9.42°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
92.57°

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
2035-Oct-13 07:34 0.433171 AU
64801414 km
30.54 km/s
2040-Sep-18 00:17 0.165867 AU
24813360 km
17.12 km/s
2045-Jul-14 04:26 0.350455 AU
52427277 km
17.64 km/s
2050-May-18 08:36 0.287348 AU
42986650 km
15.72 km/s
2055-Mar-30 01:57 0.194451 AU
29089470 km
22.67 km/s
2072-Sep-30 05:18 0.213023 AU
31867806 km
22.78 km/s
2077-Aug-17 10:28 0.288399 AU
43143849 km
14.16 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
20.09

Orbit Quality

RMS
0.56373
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.