SpaceAtlas Space Object Data
NASA JPL SBDB · 2004 XM29

2004 XM29

2004 XM29 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 2.138 AU it takes 3.13 yr to circle the Sun.

Apollo Observations: 139
Orbital Period · P
3.13 yr
v(q)
42.9 km/s
v(Q)
9.7 km/s
Diameter · ≈
0.09 km
TJ
3.43
Eccentricity · e
0.632

Orbit and dynamics

Between its closest point (0.787 AU) and its farthest (3.489 AU), the heliocentric distance changes by 2.702 AU over every revolution.

One full revolution takes 3.13 yr (1,142 days), computed from the semi-major axis of 2.138 AU.

The high eccentricity (0.632) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

Its inclination of 2.58° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 42.9 km/s at perihelion and falls to 9.7 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 = 22.9 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.09 km.

Observation record and orbit quality

Astrometry from 139 individual observations underpins this orbit; the fit leaves an RMS residual of 0.5212 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
2.138 AU
Eccentricity
0.632
Perihelion
0.787 AU
Aphelion
3.489216 AU
Inclination
2.58°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
296.08°

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
2030-Jan-08 11:06 0.073744 AU
11031890 km
12.97 km/s
2033-May-16 04:34 0.152140 AU
22759825 km
19.49 km/s
2051-Dec-21 05:17 0.154076 AU
23049418 km
19.65 km/s
2055-May-04 03:13 0.038055 AU
5692965 km
14.70 km/s
2077-Feb-17 07:16 0.203293 AU
30412157 km
12.80 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
22.9

Orbit Quality

RMS
0.5212
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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