SpaceAtlas Space Object Data
NASA JPL SBDB · 2022 HM4

2022 HM4

2022 HM4 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.187 AU it takes 1.29 yr to circle the Sun.

Apollo Observations: 61
Orbital Period · P
1.29 yr
v(q)
35.7 km/s
v(Q)
21 km/s
Diameter · ≈
0.03 km
TJ
5.28
Eccentricity · e
0.2594

Orbit and dynamics

The path is an ellipse reaching 0.879 AU from the Sun at perihelion and 1.495 AU at aphelion, a radial span of 0.616 AU.

Applying Kepler's third law to a = 1.187 AU gives an orbital period of 1.29 yr, or about 472 days.

An eccentricity of 0.259 makes the orbit moderately elongated.

The orbital plane is tilted 15.06° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 35.7 km/s at perihelion and falls to 21 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 = 25.2 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 61 observations and has a weighted RMS residual of 0.4347 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
1.187 AU
Eccentricity
0.2594
Perihelion
0.879 AU
Aphelion
1.494908 AU
Inclination
15.06°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
13.12°

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-Oct-17 13:29 0.139160 AU
20818044 km
8.53 km/s
2035-Apr-15 08:13 0.261262 AU
39084202 km
21.28 km/s
2040-Oct-14 06:26 0.103085 AU
15421313 km
13.46 km/s
2062-Oct-12 18:21 0.104063 AU
15567536 km
9.90 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
25.2

Orbit Quality

RMS
0.43467
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.

Keep exploring

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