SpaceAtlas Space Object Data
NASA JPL SBDB · 2017 UA

2017 UA

2017 UA belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.105 AU it takes 1.16 yr to circle the Sun.

Apollo Observations: 37
Orbital Period · P
1.16 yr
v(q)
36.9 km/s
v(Q)
21.7 km/s
Diameter · ≈
0.01 km
TJ
5.59
Eccentricity · e
0.2585

Orbit and dynamics

Between its closest point (0.82 AU) and its farthest (1.391 AU), the heliocentric distance changes by 0.571 AU over every revolution.

One full revolution takes 1.16 yr (424 days), computed from the semi-major axis of 1.105 AU.

An eccentricity of 0.259 makes the orbit moderately elongated.

The orbital plane is tilted 6.78° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 36.9 km/s at perihelion and falls to 21.7 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 = 28.5 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.01 km.

Observation record and orbit quality

Astrometry from 37 individual observations underpins this orbit; the fit leaves an RMS residual of 0.5058 arcseconds.

Condition code U = 6 indicates a moderately constrained orbit; predictions decades ahead still carry noticeable uncertainty.

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
1.105 AU
Eccentricity
0.2585
Perihelion
0.82 AU
Aphelion
1.390643 AU
Inclination
6.78°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
102.43°

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-Sep-30 13:32 0.320388 AU
47929378 km
17.43 km/s
2032-Jul-22 12:59 0.390759 AU
58456750 km
7.41 km/s
2033-Apr-05 00:07 0.050653 AU
7577581 km
9.55 km/s
2038-Sep-23 17:47 0.467448 AU
69929198 km
21.66 km/s
2039-Aug-08 01:29 0.365999 AU
54752719 km
7.04 km/s
2040-Mar-28 01:18 0.072363 AU
10825364 km
5.83 km/s
2046-Aug-29 06:04 0.310511 AU
46451853 km
6.16 km/s
2047-Jan-24 07:57 0.190312 AU
28470324 km
6.38 km/s
2047-Apr-29 13:02 0.237346 AU
35506483 km
5.28 km/s
2053-Dec-03 17:29 0.164041 AU
24540233 km
5.94 km/s
2054-May-27 08:36 0.325592 AU
48707813 km
6.62 km/s
2060-Oct-18 12:55 0.003445 AU
515429 km
7.51 km/s
2061-Jun-14 09:04 0.374342 AU
56000763 km
7.32 km/s
2062-Apr-22 12:51 0.429966 AU
64322068 km
20.67 km/s
2069-Apr-23 05:46 0.415155 AU
62106333 km
21.65 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
28.5

Orbit Quality

RMS
0.50577
Condition
6
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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