SpaceAtlas Space Object Data
NASA JPL SBDB · 2015 HT182

2015 HT182

2015 HT182 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.482 AU once every 1.80 yr.

Amor Observations: 12
Orbital Period · P
1.80 yr
v(q)
28.8 km/s
v(Q)
20.8 km/s
Diameter · ≈
0.04 km
TJ
4.51
Eccentricity · e
0.161

Orbit and dynamics

The path is an ellipse reaching 1.243 AU from the Sun at perihelion and 1.721 AU at aphelion, a radial span of 0.478 AU.

Applying Kepler's third law to a = 1.482 AU gives an orbital period of 1.80 yr, or about 659 days.

An eccentricity of 0.161 makes the orbit moderately elongated.

The orbital plane is tilted 17.76° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 28.8 km/s at perihelion and falls to 20.8 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 = 24.68 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.04 km.

Observation record and orbit quality

The current orbit solution is based on 12 observations and has a weighted RMS residual of 0.2021 arcseconds.

Condition code U = 9 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
1.482 AU
Eccentricity
0.161
Perihelion
1.243 AU
Aphelion
1.720602 AU
Inclination
17.76°
Orbital Period
— yr
Epoch
2457132.5
Mean Anomaly
22.7°

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

No close approaches to Earth are currently on record for this object.

Physical Parameters

Diameter
— km
Albedo
—
Density
— g/cm³
Rotation Period
— h
Absolute Magnitude
24.68

Orbit Quality

RMS
0.20207
Condition
9
Orbit ID
—
Data source: NASA JPL Small-Body Database . 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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