SpaceAtlas Space Object Data
NASA JPL SBDB · 2004 XK3

2004 XK3

2004 XK3 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.228 AU it takes 1.36 yr to circle the Sun.

Apollo Observations: 246
Orbital Period · P
1.36 yr
v(q)
35.1 km/s
v(Q)
20.6 km/s
Diameter · ≈
0.05 km
TJ
5.18
Eccentricity · e
0.2604

Orbit and dynamics

The path is an ellipse reaching 0.908 AU from the Sun at perihelion and 1.548 AU at aphelion, a radial span of 0.64 AU.

Applying Kepler's third law to a = 1.228 AU gives an orbital period of 1.36 yr, or about 497 days.

An eccentricity of 0.26 makes the orbit moderately elongated.

Its inclination of 1.48° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 35.1 km/s at perihelion and falls to 20.6 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

No direct size measurement is available; from an absolute magnitude of H = 24.47 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.05 km.

Observation record and orbit quality

The current orbit solution is based on 246 observations and has a weighted RMS residual of 0.5561 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
1.228 AU
Eccentricity
0.2604
Perihelion
0.908 AU
Aphelion
1.547771 AU
Inclination
1.48°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
357.1°

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
2027-May-04 21:50 0.460396 AU
68874226 km
7.71 km/s
2027-Dec-08 21:32 0.302425 AU
45242145 km
15.68 km/s
2038-Jul-18 16:39 0.057205 AU
8557702 km
8.09 km/s
2039-Jan-16 08:04 0.365987 AU
54750867 km
6.21 km/s
2042-May-27 13:05 0.366095 AU
54767087 km
5.91 km/s
2042-Nov-24 12:23 0.055926 AU
8366459 km
8.25 km/s
2053-Jul-04 15:32 0.277758 AU
41552048 km
14.68 km/s
2054-Feb-06 00:36 0.455039 AU
68072820 km
7.87 km/s
2057-Oct-10 22:07 0.088898 AU
13298887 km
5.30 km/s
2061-Apr-28 09:02 0.483225 AU
72289386 km
8.10 km/s
2061-Dec-12 20:20 0.386840 AU
57870399 km
18.20 km/s
2068-Jun-23 21:17 0.485649 AU
72652058 km
20.76 km/s
2072-Jul-26 16:41 0.026626 AU
3983249 km
6.18 km/s
2073-Jan-07 03:25 0.329858 AU
49346018 km
5.41 km/s
2076-May-14 14:49 0.421376 AU
63036908 km
6.97 km/s
2076-Dec-02 10:55 0.185399 AU
27735327 km
12.17 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
24.47

Orbit Quality

RMS
0.55612
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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