SpaceAtlas Space Object Data
NASA JPL SBDB · 2015 AX44

2015 AX44

2015 AX44 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.436 AU it takes 1.72 yr to circle the Sun.

Apollo Observations: 75
Orbital Period · P
1.72 yr
v(q)
37.8 km/s
v(Q)
16.3 km/s
Diameter · ≈
0.35 km
TJ
4.47
Eccentricity · e
0.3967

Orbit and dynamics

Between its closest point (0.866 AU) and its farthest (2.006 AU), the heliocentric distance changes by 1.14 AU over every revolution.

One full revolution takes 1.72 yr (629 days), computed from the semi-major axis of 1.436 AU.

An eccentricity of 0.397 makes the orbit moderately elongated.

A steep inclination of 28.93° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 37.8 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 = 20.06 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.35 km.

Observation record and orbit quality

Astrometry from 75 individual observations underpins this orbit; the fit leaves an RMS residual of 0.5908 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
1.436 AU
Eccentricity
0.3967
Perihelion
0.866 AU
Aphelion
2.005661 AU
Inclination
28.93°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
346.44°

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
2031-Aug-26 07:16 0.351146 AU
52530661 km
18.75 km/s
2038-Jun-22 16:30 0.313357 AU
46877498 km
22.25 km/s
2050-Jul-16 11:04 0.122165 AU
18275617 km
18.64 km/s
2062-Aug-14 14:34 0.273536 AU
40920472 km
18.30 km/s
2069-Jun-15 22:17 0.393664 AU
58891360 km
23.95 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
20.06

Orbit Quality

RMS
0.59078
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

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