SpaceAtlas Space Object Data
NASA JPL SBDB · 2017 HQ3

2017 HQ3

2017 HQ3 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.1 AU it takes 1.15 yr to circle the Sun.

Apollo Observations: 56
Orbital Period · P
1.15 yr
v(q)
30.8 km/s
v(Q)
26.2 km/s
Diameter · ≈
0.03 km
TJ
5.62
Eccentricity · e
0.0806

Orbit and dynamics

The path is an ellipse reaching 1.012 AU from the Sun at perihelion and 1.189 AU at aphelion, a radial span of 0.177 AU.

Applying Kepler's third law to a = 1.1 AU gives an orbital period of 1.15 yr, or about 421 days.

With e = 0.081, the orbit is close to circular.

The orbital plane is tilted 14.95° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 30.8 km/s at perihelion and falls to 26.2 km/s at aphelion.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 25.71 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.03 km.

Observation record and orbit quality

The current orbit solution is based on 56 observations and has a weighted RMS residual of 0.4087 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
1.1 AU
Eccentricity
0.0806
Perihelion
1.012 AU
Aphelion
1.18866 AU
Inclination
14.95°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
16.07°

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
2031-Nov-20 20:52 0.156574 AU
23423209 km
8.59 km/s
2032-Apr-26 17:55 0.047419 AU
7093769 km
8.01 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
25.71

Orbit Quality

RMS
0.40872
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.

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