SpaceAtlas Space Object Data
NASA JPL SBDB · 2019 YA3

2019 YA3

2019 YA3 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.94 AU and a period of 0.91 yr.

Aten Observations: 18
Orbital Period · P
0.91 yr
v(q)
40.4 km/s
v(Q)
23.3 km/s
Diameter · ≈
0.02 km
TJ
6.35
Eccentricity · e
0.2683

Orbit and dynamics

Between its closest point (0.688 AU) and its farthest (1.192 AU), the heliocentric distance changes by 0.504 AU over every revolution.

One full revolution takes 0.91 yr (333 days), computed from the semi-major axis of 0.94 AU.

An eccentricity of 0.268 makes the orbit moderately elongated.

Its inclination of 1.54° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 40.4 km/s at perihelion and falls to 23.3 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 = 26.42 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.02 km.

Observation record and orbit quality

Astrometry from 18 individual observations underpins this orbit; the fit leaves an RMS residual of 0.5042 arcseconds.

Condition code U = 5 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
0.9402 AU
Eccentricity
0.2683
Perihelion
0.688 AU
Aphelion
1.192456 AU
Inclination
1.54°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
136.79°

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-Dec-10 03:26 0.121944 AU
18242602 km
12.04 km/s
2030-Sep-13 23:11 0.297374 AU
44486513 km
9.73 km/s
2031-Feb-12 03:18 0.204792 AU
30636409 km
6.85 km/s
2031-Jun-27 02:59 0.282075 AU
42197757 km
8.86 km/s
2032-Apr-06 12:04 0.163468 AU
24454431 km
13.44 km/s
2039-Dec-17 20:36 0.303530 AU
45407387 km
17.95 km/s
2040-Oct-18 19:24 0.224062 AU
33519247 km
6.16 km/s
2041-Jan-11 08:21 0.174186 AU
26057866 km
6.38 km/s
2041-Jul-24 17:31 0.318621 AU
47665086 km
10.72 km/s
2042-Apr-11 16:04 0.023672 AU
3541262 km
7.97 km/s
2050-Dec-07 10:19 0.002201 AU
329205 km
7.70 km/s
2051-Aug-22 18:56 0.322408 AU
48231604 km
10.94 km/s
2052-Mar-10 09:20 0.162782 AU
24351890 km
6.16 km/s
2052-May-21 16:51 0.205831 AU
30791947 km
5.12 km/s
2053-Mar-30 15:20 0.307140 AU
45947473 km
18.53 km/s
2060-Dec-07 03:49 0.000147 AU
21930 km
8.62 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
26.42

Orbit Quality

RMS
0.50416
Condition
5
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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