SpaceAtlas Space Object Data
NASA JPL SBDB · 2015 SH

2015 SH

2015 SH belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.186 AU it takes 1.29 yr to circle the Sun.

Apollo Observations: 34
Orbital Period · P
1.29 yr
v(q)
32.8 km/s
v(Q)
22.8 km/s
Diameter · ≈
0.01 km
TJ
5.32
Eccentricity · e
0.1796

Orbit and dynamics

The path is an ellipse reaching 0.973 AU from the Sun at perihelion and 1.399 AU at aphelion, a radial span of 0.426 AU.

Applying Kepler's third law to a = 1.186 AU gives an orbital period of 1.29 yr, or about 472 days.

An eccentricity of 0.18 makes the orbit moderately elongated.

The orbital plane is tilted 5.61° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 32.8 km/s at perihelion and falls to 22.8 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 = 28.1 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.01 km.

Observation record and orbit quality

The current orbit solution is based on 34 observations and has a weighted RMS residual of 0.485 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
1.186 AU
Eccentricity
0.1796
Perihelion
0.973 AU
Aphelion
1.399006 AU
Inclination
5.61°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
148.78°

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
2029-Jan-09 12:31 0.405774 AU
60702978 km
7.23 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
28.1

Orbit Quality

RMS
0.485
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.

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