SpaceAtlas Space Object Data
NASA JPL SBDB · 2015 HM10

2015 HM10

2015 HM10 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 2.535 AU it takes 4.04 yr to circle the Sun.

Apollo Observations: 233
Orbital Period · P
4.04 yr
v(q)
37.6 km/s
v(Q)
9.3 km/s
Diameter · ≈
0.07 km
TJ
3.17
Eccentricity · e
0.6039

Orbit and dynamics

The path is an ellipse reaching 1.004 AU from the Sun at perihelion and 4.066 AU at aphelion, a radial span of 3.062 AU.

Applying Kepler's third law to a = 2.535 AU gives an orbital period of 4.04 yr, or about 1,474 days.

The high eccentricity (0.604) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

Its inclination of 1.5° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 37.6 km/s at perihelion and falls to 9.3 km/s at aphelion.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 23.59 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.07 km.

Observation record and orbit quality

The current orbit solution is based on 233 observations and has a weighted RMS residual of 0.4379 arcseconds.

Condition code U = 0 means the orbit is very well determined, leaving only a small uncertainty in the future ephemeris.

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
2.535 AU
Eccentricity
0.6039
Perihelion
1.004 AU
Aphelion
4.065886 AU
Inclination
1.5°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
255.69°

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
2072-May-19 04:59 0.290709 AU
43489390 km
15.39 km/s
2076-Aug-15 07:48 0.341894 AU
51146548 km
16.63 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
23.59

Orbit Quality

RMS
0.43788
Condition
0
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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