SpaceAtlas Space Object Data
NASA JPL SBDB · 2019 HS2

2019 HS2

2019 HS2 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.995 AU and a period of 0.99 yr.

Aten Observations: 19
Orbital Period · P
0.99 yr
v(q)
37.2 km/s
v(Q)
24 km/s
Diameter · ≈
0.02 km
TJ
6.04
Eccentricity · e
0.2155

Orbit and dynamics

Between its closest point (0.78 AU) and its farthest (1.209 AU), the heliocentric distance changes by 0.429 AU over every revolution.

One full revolution takes 0.99 yr (362 days), computed from the semi-major axis of 0.995 AU.

An eccentricity of 0.215 makes the orbit moderately elongated.

The orbital plane is tilted 19.55° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 37.2 km/s at perihelion and falls to 24 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 = 26.6 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.02 km.

Observation record and orbit quality

Astrometry from 19 individual observations underpins this orbit; the fit leaves an RMS residual of 0.6092 arcseconds.

Condition code U = 7 signals a poorly constrained orbit, so its future path should be treated as provisional.

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
0.9949 AU
Eccentricity
0.2155
Perihelion
0.78 AU
Aphelion
1.209301 AU
Inclination
19.55°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
335.42°

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
2027-Apr-17 09:38 0.286597 AU
42874301 km
19.56 km/s
2028-Apr-14 20:55 0.328852 AU
49195489 km
20.82 km/s
2029-Apr-13 07:28 0.371860 AU
55629411 km
22.10 km/s
2030-Apr-11 16:09 0.414971 AU
62078777 km
23.39 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
26.6

Orbit Quality

RMS
0.60918
Condition
7
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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