SpaceAtlas Space Object Data
NASA JPL SBDB · 2022 UL9

2022 UL9

2022 UL9 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.471 AU it takes 1.78 yr to circle the Sun.

Apollo Observations: 126
Orbital Period · P
1.78 yr
v(q)
47.9 km/s
v(Q)
12.6 km/s
Diameter · ≈
0.14 km
TJ
4.4
Eccentricity · e
0.5843

Orbit and dynamics

Between its closest point (0.612 AU) and its farthest (2.331 AU), the heliocentric distance changes by 1.719 AU over every revolution.

One full revolution takes 1.78 yr (652 days), computed from the semi-major axis of 1.471 AU.

The high eccentricity (0.584) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

Its inclination of 3.83° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 47.9 km/s at perihelion and falls to 12.6 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 = 21.98 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.14 km.

Observation record and orbit quality

Astrometry from 126 individual observations underpins this orbit; the fit leaves an RMS residual of 0.4058 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
1.471 AU
Eccentricity
0.5843
Perihelion
0.612 AU
Aphelion
2.330505 AU
Inclination
3.83°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
40.82°

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-24 14:58 0.351039 AU
52514645 km
15.45 km/s
2033-Mar-28 09:07 0.259425 AU
38809497 km
25.97 km/s
2038-Nov-08 16:18 0.412709 AU
61740384 km
30.71 km/s
2040-Jun-24 06:48 0.392094 AU
58656419 km
17.58 km/s
2047-Oct-13 15:12 0.105616 AU
15799989 km
15.19 km/s
2049-Apr-13 03:04 0.058712 AU
8783262 km
16.62 km/s
2056-Jul-29 17:23 0.399351 AU
59742018 km
18.21 km/s
2058-Mar-19 02:00 0.467067 AU
69872162 km
32.34 km/s
2063-Oct-29 17:34 0.195314 AU
29218628 km
24.02 km/s
2065-May-23 20:49 0.315987 AU
47270912 km
13.35 km/s
2072-Sep-07 03:11 0.309243 AU
46262081 km
13.46 km/s
2074-Apr-01 15:43 0.181358 AU
27130718 km
23.58 km/s
2079-Nov-11 23:42 0.471256 AU
70498863 km
32.52 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
21.98

Orbit Quality

RMS
0.4058
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.

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