SpaceAtlas Space Object Data
NASA JPL SBDB · 2011 UX275

2011 UX275

2011 UX275 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.035 AU it takes 1.05 yr to circle the Sun.

Apollo Observations: 22
Orbital Period · P
1.05 yr
v(q)
31.6 km/s
v(Q)
27.1 km/s
Diameter · ≈
0.02 km
TJ
5.91
Eccentricity · e
0.0765

Orbit and dynamics

Between its closest point (0.956 AU) and its farthest (1.114 AU), the heliocentric distance changes by 0.158 AU over every revolution.

One full revolution takes 1.05 yr (385 days), computed from the semi-major axis of 1.035 AU.

With e = 0.076, the orbit is close to circular.

Its inclination of 4.54° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 31.6 km/s at perihelion and falls to 27.1 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 = 25.8 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.02 km.

Observation record and orbit quality

Astrometry from 22 individual observations underpins this orbit; the fit leaves an RMS residual of 0.4975 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
1.035 AU
Eccentricity
0.0765
Perihelion
0.956 AU
Aphelion
1.114177 AU
Inclination
4.54°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
72.53°

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-Mar-21 18:45 0.400055 AU
59847413 km
16.84 km/s
2030-Apr-06 11:13 0.072335 AU
10821100 km
7.28 km/s
2032-Sep-25 20:54 0.209591 AU
31354428 km
10.78 km/s
2050-Apr-02 19:19 0.094735 AU
14172217 km
8.83 km/s
2052-Sep-23 08:04 0.132447 AU
19813805 km
9.20 km/s
2070-Mar-31 01:06 0.170063 AU
25441048 km
10.02 km/s
2072-Sep-21 10:43 0.112892 AU
16888390 km
8.29 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
25.8

Orbit Quality

RMS
0.49745
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

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