SpaceAtlas Space Object Data
NASA JPL SBDB · 2016 XM23

2016 XM23

2016 XM23 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.224 AU it takes 1.35 yr to circle the Sun.

Apollo Observations: 48
Orbital Period · P
1.35 yr
v(q)
38.4 km/s
v(Q)
18.9 km/s
Diameter · ≈
0.15 km
TJ
5.07
Eccentricity · e
0.3402

Orbit and dynamics

The path is an ellipse reaching 0.808 AU from the Sun at perihelion and 1.64 AU at aphelion, a radial span of 0.832 AU.

Applying Kepler's third law to a = 1.224 AU gives an orbital period of 1.35 yr, or about 495 days.

An eccentricity of 0.34 makes the orbit moderately elongated.

A steep inclination of 26.15° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 38.4 km/s at perihelion and falls to 18.9 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 = 21.88 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.15 km.

Observation record and orbit quality

The current orbit solution is based on 48 observations and has a weighted RMS residual of 0.6871 arcseconds.

Condition code U = 7 signals a poorly constrained orbit, so its future path should be treated as provisional.

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
1.224 AU
Eccentricity
0.3402
Perihelion
0.808 AU
Aphelion
1.640405 AU
Inclination
26.15°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
79.74°

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-09 19:39 0.170184 AU
25459141 km
21.56 km/s
2031-Jun-02 12:52 0.080843 AU
12093872 km
14.98 km/s
2035-Nov-14 11:17 0.218144 AU
32633936 km
14.43 km/s
2039-Nov-15 09:26 0.213371 AU
31919876 km
20.50 km/s
2046-Apr-29 14:16 0.273811 AU
40961521 km
26.33 km/s
2054-Nov-22 04:29 0.293710 AU
43938390 km
13.86 km/s
2058-Nov-12 10:28 0.186499 AU
27899840 km
16.14 km/s
2062-Nov-19 04:17 0.245164 AU
36676055 km
24.00 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
21.88

Orbit Quality

RMS
0.68714
Condition
7
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.