SpaceAtlas Space Object Data
NASA JPL SBDB · 2014 HB177

2014 HB177

2014 HB177 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.114 AU it takes 1.18 yr to circle the Sun.

Apollo Observations: 36
Orbital Period · P
1.18 yr
v(q)
34.4 km/s
v(Q)
23.2 km/s
Diameter · ≈
0.01 km
TJ
5.58
Eccentricity · e
0.1947

Orbit and dynamics

Between its closest point (0.897 AU) and its farthest (1.331 AU), the heliocentric distance changes by 0.434 AU over every revolution.

One full revolution takes 1.18 yr (429 days), computed from the semi-major axis of 1.114 AU.

An eccentricity of 0.195 makes the orbit moderately elongated.

Its inclination of 3.48° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 34.4 km/s at perihelion and falls to 23.2 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 = 28.1 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.01 km.

Observation record and orbit quality

Astrometry from 36 individual observations underpins this orbit; the fit leaves an RMS residual of 0.3365 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
1.114 AU
Eccentricity
0.1947
Perihelion
0.897 AU
Aphelion
1.330896 AU
Inclination
3.48°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
48.42°

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
2034-May-06 19:15 0.000528 AU
79007 km
6.13 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
0.33647
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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