SpaceAtlas Space Object Data
NASA JPL SBDB · 2018 HV1

2018 HV1

2018 HV1 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.367 AU it takes 1.60 yr to circle the Sun.

Apollo Observations: 89
Orbital Period · P
1.60 yr
v(q)
44.3 km/s
v(Q)
14.7 km/s
Diameter · ≈
0.09 km
TJ
4.69
Eccentricity · e
0.5024

Orbit and dynamics

The path is an ellipse reaching 0.68 AU from the Sun at perihelion and 2.054 AU at aphelion, a radial span of 1.374 AU.

Applying Kepler's third law to a = 1.367 AU gives an orbital period of 1.60 yr, or about 584 days.

The high eccentricity (0.502) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

Its inclination of 3.4° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 44.3 km/s at perihelion and falls to 14.7 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 = 23.1 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.09 km.

Observation record and orbit quality

The current orbit solution is based on 89 observations and has a weighted RMS residual of 0.467 arcseconds.

Condition code U = 0 means the orbit is very well determined, leaving only a small uncertainty in the future ephemeris.

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
1.367 AU
Eccentricity
0.5024
Perihelion
0.68 AU
Aphelion
2.053781 AU
Inclination
3.4°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
348.51°

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
2029-Oct-28 20:56 0.117695 AU
17606905 km
12.05 km/s
2034-Apr-30 00:57 0.170212 AU
25463363 km
20.04 km/s
2037-Oct-16 07:13 0.197690 AU
29573933 km
10.08 km/s
2077-Oct-21 08:25 0.176890 AU
26462418 km
10.40 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
23.1

Orbit Quality

RMS
0.46698
Condition
0
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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