SpaceAtlas Space Object Data
NASA JPL SBDB · 2019 YA1

2019 YA1

2019 YA1 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.69 AU it takes 2.20 yr to circle the Sun.

Apollo Observations: 104
Orbital Period · P
2.20 yr
v(q)
35.4 km/s
v(Q)
14.8 km/s
Diameter · ≈
0.03 km
TJ
4.12
Eccentricity · e
0.4095

Orbit and dynamics

Between its closest point (0.998 AU) and its farthest (2.382 AU), the heliocentric distance changes by 1.384 AU over every revolution.

One full revolution takes 2.20 yr (802 days), computed from the semi-major axis of 1.69 AU.

The high eccentricity (0.409) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

Its inclination of 2.13° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 35.4 km/s at perihelion and falls to 14.8 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 = 25.53 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.03 km.

Observation record and orbit quality

Astrometry from 104 individual observations underpins this orbit; the fit leaves an RMS residual of 0.5653 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
1.69 AU
Eccentricity
0.4095
Perihelion
0.998 AU
Aphelion
2.382055 AU
Inclination
2.13°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
342.71°

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
2030-Nov-25 08:17 0.009454 AU
1414338 km
5.78 km/s
2041-Oct-17 15:00 0.352380 AU
52715331 km
16.85 km/s
2055-Jan-30 07:38 0.258324 AU
38644736 km
15.79 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
25.53

Orbit Quality

RMS
0.56529
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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