SpaceAtlas Space Object Data
NASA JPL SBDB · 2017 UU1

2017 UU1

2017 UU1 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.111 AU it takes 1.17 yr to circle the Sun.

Apollo Observations: 94
Orbital Period · P
1.17 yr
v(q)
32.2 km/s
v(Q)
24.8 km/s
Diameter · ≈
0.01 km
TJ
5.59
Eccentricity · e
0.1295

Orbit and dynamics

Between its closest point (0.967 AU) and its farthest (1.255 AU), the heliocentric distance changes by 0.288 AU over every revolution.

One full revolution takes 1.17 yr (428 days), computed from the semi-major axis of 1.111 AU.

An eccentricity of 0.13 makes the orbit moderately elongated.

The orbital plane is tilted 8.61° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 32.2 km/s at perihelion and falls to 24.8 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 = 26.9 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.01 km.

Observation record and orbit quality

Astrometry from 94 individual observations underpins this orbit; the fit leaves an RMS residual of 0.4354 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
1.111 AU
Eccentricity
0.1295
Perihelion
0.967 AU
Aphelion
1.254874 AU
Inclination
8.61°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
175.11°

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-Mar-28 13:32 0.251866 AU
37678637 km
6.11 km/s
2031-Nov-02 16:07 0.242575 AU
36288763 km
11.73 km/s
2037-May-30 12:28 0.480130 AU
71826429 km
17.39 km/s
2038-Mar-06 00:21 0.286065 AU
42794768 km
6.09 km/s
2038-Nov-10 05:30 0.405972 AU
60732527 km
16.40 km/s
2044-Jun-05 08:17 0.327170 AU
48943973 km
12.74 km/s
2045-Feb-09 10:53 0.298516 AU
44657338 km
5.54 km/s
2051-Jun-10 02:40 0.195703 AU
29276727 km
8.37 km/s
2052-Jan-11 06:39 0.275116 AU
41156835 km
4.39 km/s
2058-Jun-04 00:45 0.136760 AU
20459070 km
5.37 km/s
2065-May-16 23:29 0.145384 AU
21749204 km
5.00 km/s
2065-Oct-05 18:43 0.074010 AU
11071811 km
4.86 km/s
2072-May-05 06:31 0.166551 AU
24915672 km
5.25 km/s
2072-Oct-15 11:18 0.009794 AU
1465175 km
5.47 km/s
2079-Jun-03 22:32 0.134084 AU
20058622 km
6.11 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
26.9

Orbit Quality

RMS
0.43536
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.

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