SpaceAtlas Space Object Data
NASA JPL SBDB · 2017 HV4

2017 HV4

2017 HV4 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.503 AU once every 1.84 yr.

Amor Observations: 93
Orbital Period · P
1.84 yr
v(q)
32.9 km/s
v(Q)
17.9 km/s
Diameter · ≈
0.05 km
TJ
4.49
Eccentricity · e
0.2953

Orbit and dynamics

The path is an ellipse reaching 1.059 AU from the Sun at perihelion and 1.947 AU at aphelion, a radial span of 0.888 AU.

Applying Kepler's third law to a = 1.503 AU gives an orbital period of 1.84 yr, or about 673 days.

An eccentricity of 0.295 makes the orbit moderately elongated.

Its inclination of 1.32° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 32.9 km/s at perihelion and falls to 17.9 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 = 24.1 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.05 km.

Observation record and orbit quality

The current orbit solution is based on 93 observations and has a weighted RMS residual of 0.4792 arcseconds.

Condition code U = 5 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
1.503 AU
Eccentricity
0.2953
Perihelion
1.059 AU
Aphelion
1.946836 AU
Inclination
1.32°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
314.92°

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
2028-Apr-17 15:12 0.352297 AU
52702842 km
1.56 km/s
2028-Jul-28 01:02 0.281923 AU
42175145 km
11.71 km/s
2041-May-09 10:53 0.303869 AU
45458211 km
12.44 km/s
2041-Aug-24 20:06 0.367958 AU
55045792 km
2.26 km/s
2052-Jun-26 15:33 0.042741 AU
6393968 km
3.91 km/s
2063-Mar-22 02:57 0.457339 AU
68416872 km
5.40 km/s
2063-Aug-10 02:09 0.432861 AU
64755084 km
17.64 km/s
2065-May-02 19:25 0.377465 AU
56467996 km
16.23 km/s
2065-Sep-11 21:15 0.422368 AU
63185408 km
4.60 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
24.1

Orbit Quality

RMS
0.47918
Condition
5
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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