SpaceAtlas Space Object Data
NASA JPL SBDB · 2014 SD304

2014 SD304

2014 SD304 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.168 AU once every 1.26 yr.

Amor Observations: 76
Orbital Period · P
1.26 yr
v(q)
30.7 km/s
v(Q)
24.7 km/s
Diameter · ≈
0.03 km
TJ
5.4
Eccentricity · e
0.1086

Orbit and dynamics

Between its closest point (1.041 AU) and its farthest (1.295 AU), the heliocentric distance changes by 0.254 AU over every revolution.

One full revolution takes 1.26 yr (461 days), computed from the semi-major axis of 1.168 AU.

An eccentricity of 0.109 makes the orbit moderately elongated.

Its inclination of 2.29° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 30.7 km/s at perihelion and falls to 24.7 km/s at aphelion.

Its perihelion lies just outside Earth's orbit, which is why it is classed as Earth-approaching rather than Earth-crossing.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 25.08 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.03 km.

Observation record and orbit quality

Astrometry from 76 individual observations underpins this orbit; the fit leaves an RMS residual of 0.393 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
1.168 AU
Eccentricity
0.1086
Perihelion
1.041 AU
Aphelion
1.294845 AU
Inclination
2.29°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
79.99°

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-Apr-02 10:52 0.291041 AU
43539071 km
5.10 km/s
2034-Feb-18 23:20 0.249492 AU
37323417 km
4.29 km/s
2038-Dec-06 12:02 0.130709 AU
19553775 km
0.76 km/s
2043-Aug-08 11:20 0.142774 AU
21358675 km
1.15 km/s
2048-May-29 11:57 0.255971 AU
38292749 km
4.10 km/s
2053-Apr-17 10:17 0.291552 AU
43615619 km
5.08 km/s
2058-Mar-08 19:13 0.272457 AU
40759057 km
4.77 km/s
2063-Jan-17 04:13 0.193080 AU
28884387 km
2.82 km/s
2067-Oct-04 14:34 0.059849 AU
8953306 km
1.61 km/s
2072-Jun-07 01:06 0.247017 AU
36953167 km
3.85 km/s
2077-Apr-16 17:21 0.295048 AU
44138492 km
5.12 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
25.08

Orbit Quality

RMS
0.39304
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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