SpaceAtlas Space Object Data
NASA JPL SBDB · 2020 HS1

2020 HS1

2020 HS1 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.112 AU once every 1.17 yr.

Amor Observations: 38
Orbital Period · P
1.17 yr
v(q)
30.2 km/s
v(Q)
26.4 km/s
Diameter · ≈
0.02 km
TJ
5.6
Eccentricity · e
0.0675

Orbit and dynamics

The path is an ellipse reaching 1.037 AU from the Sun at perihelion and 1.187 AU at aphelion, a radial span of 0.15 AU.

Applying Kepler's third law to a = 1.112 AU gives an orbital period of 1.17 yr, or about 428 days.

With e = 0.068, the orbit is close to circular.

Its inclination of 2.54° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 30.2 km/s at perihelion and falls to 26.4 km/s at aphelion.

Its perihelion lies just outside Earth's orbit, which is why it is classed as Earth-approaching rather than Earth-crossing.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 25.86 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.02 km.

Observation record and orbit quality

The current orbit solution is based on 38 observations and has a weighted RMS residual of 0.3956 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
1.112 AU
Eccentricity
0.0675
Perihelion
1.037 AU
Aphelion
1.18706 AU
Inclination
2.54°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
71.49°

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-Feb-01 20:34 0.139809 AU
20915182 km
2.29 km/s
2033-Dec-03 09:07 0.197120 AU
29488728 km
3.70 km/s
2034-Jun-13 22:58 0.425548 AU
63661047 km
13.26 km/s
2040-Oct-13 22:47 0.180878 AU
27058948 km
3.56 km/s
2047-May-02 07:08 0.086904 AU
13000723 km
4.10 km/s
2060-Dec-18 20:00 0.188015 AU
28126696 km
3.51 km/s
2061-Jun-10 01:14 0.352294 AU
52702492 km
11.18 km/s
2074-May-01 10:53 0.016081 AU
2405694 km
3.24 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
25.86

Orbit Quality

RMS
0.39564
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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