SpaceAtlas Space Object Data
NASA JPL SBDB · 2023 MH1

2023 MH1

2023 MH1 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.359 AU once every 1.58 yr.

Amor Observations: 35
Orbital Period · P
1.58 yr
v(q)
30.7 km/s
v(Q)
21.3 km/s
Diameter · ≈
0.03 km
TJ
4.83
Eccentricity · e
0.1819

Orbit and dynamics

Between its closest point (1.112 AU) and its farthest (1.606 AU), the heliocentric distance changes by 0.494 AU over every revolution.

One full revolution takes 1.58 yr (579 days), computed from the semi-major axis of 1.359 AU.

An eccentricity of 0.182 makes the orbit moderately elongated.

Its inclination of 3.31° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 30.7 km/s at perihelion and falls to 21.3 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 = 25.04 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.03 km.

Observation record and orbit quality

Astrometry from 35 individual observations underpins this orbit; the fit leaves an RMS residual of 0.2743 arcseconds.

Condition code U = 6 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
1.359 AU
Eccentricity
0.1819
Perihelion
1.112 AU
Aphelion
1.606202 AU
Inclination
3.31°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
305.5°

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-Sep-25 11:38 0.333414 AU
49877995 km
3.95 km/s
2034-Mar-18 10:27 0.417066 AU
62392186 km
5.59 km/s
2053-Mar-06 21:55 0.453203 AU
67798235 km
6.42 km/s
2058-Oct-28 07:16 0.449800 AU
67289126 km
6.61 km/s
2077-Oct-16 21:37 0.400527 AU
59917977 km
5.76 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
25.04

Orbit Quality

RMS
0.27434
Condition
6
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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