SpaceAtlas Space Object Data
NASA JPL SBDB · 2019 MH1

2019 MH1

2019 MH1 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.827 AU and a period of 0.75 yr.

Aten Observations: 19
Orbital Period · P
0.75 yr
v(q)
62.5 km/s
v(Q)
17.2 km/s
Diameter · ≈
0.04 km
TJ
6.92
Eccentricity · e
0.5691

Orbit and dynamics

The path is an ellipse reaching 0.356 AU from the Sun at perihelion and 1.298 AU at aphelion, a radial span of 0.942 AU.

Applying Kepler's third law to a = 0.827 AU gives an orbital period of 0.75 yr, or about 275 days.

The high eccentricity (0.569) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 17.65° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 62.5 km/s at perihelion and falls to 17.2 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 = 24.71 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.04 km.

Observation record and orbit quality

The current orbit solution is based on 19 observations and has a weighted RMS residual of 0.4511 arcseconds.

Condition code U = 8 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
0.8271 AU
Eccentricity
0.5691
Perihelion
0.356 AU
Aphelion
1.297803 AU
Inclination
17.65°
Orbital Period
— yr
Epoch
2458659.5
Mean Anomaly
98.09°

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-Jun-19 07:19 0.064952 AU
9716647 km
21.35 km/s
2029-Aug-26 20:25 0.288866 AU
43213751 km
21.14 km/s
2031-Jun-21 22:38 0.079337 AU
11868645 km
23.14 km/s
2032-Aug-28 09:37 0.285835 AU
42760365 km
19.25 km/s
2034-Jun-23 20:41 0.097581 AU
14597918 km
24.98 km/s
2035-Aug-30 08:26 0.283548 AU
42418191 km
17.42 km/s
2037-Jun-25 23:29 0.121081 AU
18113395 km
26.86 km/s
2038-Aug-30 03:23 0.281758 AU
42150454 km
15.68 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
24.71

Orbit Quality

RMS
0.45115
Condition
8
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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