SpaceAtlas Space Object Data
NASA JPL SBDB · 2020 HM7

2020 HM7

2020 HM7 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.171 AU it takes 1.27 yr to circle the Sun.

Apollo Observations: 62
Orbital Period · P
1.27 yr
v(q)
40.3 km/s
v(Q)
18.8 km/s
Diameter · ≈
0.02 km
TJ
5.32
Eccentricity · e
0.3635

Orbit and dynamics

The path is an ellipse reaching 0.745 AU from the Sun at perihelion and 1.597 AU at aphelion, a radial span of 0.852 AU.

Applying Kepler's third law to a = 1.171 AU gives an orbital period of 1.27 yr, or about 463 days.

An eccentricity of 0.363 makes the orbit moderately elongated.

The orbital plane is tilted 5.21° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 40.3 km/s at perihelion and falls to 18.8 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 = 25.8 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.02 km.

Observation record and orbit quality

The current orbit solution is based on 62 observations and has a weighted RMS residual of 0.4306 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
1.171 AU
Eccentricity
0.3635
Perihelion
0.745 AU
Aphelion
1.596658 AU
Inclination
5.21°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
348.47°

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-Nov-07 04:36 0.022229 AU
3325473 km
8.62 km/s
2033-Sep-17 22:56 0.413271 AU
61824524 km
8.41 km/s
2034-May-23 08:10 0.318520 AU
47649878 km
6.88 km/s
2039-Apr-29 23:10 0.022038 AU
3296776 km
12.98 km/s
2042-Oct-21 11:29 0.179154 AU
26801110 km
17.48 km/s
2052-Sep-07 17:07 0.481503 AU
72031761 km
9.14 km/s
2053-Mar-08 09:54 0.204041 AU
30524075 km
8.25 km/s
2058-May-05 12:54 0.190568 AU
28508597 km
16.17 km/s
2061-Oct-25 22:32 0.127809 AU
19119903 km
14.72 km/s
2066-Oct-15 11:26 0.287498 AU
43009037 km
5.98 km/s
2067-Jan-01 14:54 0.224805 AU
33630395 km
9.21 km/s
2067-Jun-15 04:28 0.455834 AU
68191854 km
8.75 km/s
2072-Apr-11 08:25 0.101538 AU
15189925 km
7.00 km/s
2075-Oct-10 22:41 0.432540 AU
64707057 km
24.34 km/s
2077-May-11 05:39 0.276703 AU
41394117 km
19.65 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
25.8

Orbit Quality

RMS
0.43062
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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