SpaceAtlas Space Object Data
NASA JPL SBDB · 2012 HB34

2012 HB34

2012 HB34 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.961 AU it takes 2.75 yr to circle the Sun.

Apollo Observations: 88
Orbital Period · P
2.75 yr
v(q)
48 km/s
v(Q)
9.4 km/s
Diameter · ≈
0.43 km
TJ
3.44
Eccentricity · e
0.6715

Orbit and dynamics

The path is an ellipse reaching 0.644 AU from the Sun at perihelion and 3.278 AU at aphelion, a radial span of 2.634 AU.

Applying Kepler's third law to a = 1.961 AU gives an orbital period of 2.75 yr, or about 1,003 days.

The high eccentricity (0.671) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

A steep inclination of 30.07° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 48 km/s at perihelion and falls to 9.4 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 = 19.6 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.43 km.

Observation record and orbit quality

The current orbit solution is based on 88 observations and has a weighted RMS residual of 0.491 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
1.961 AU
Eccentricity
0.6715
Perihelion
0.644 AU
Aphelion
3.277811 AU
Inclination
30.07°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
90.42°

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
2033-Dec-17 15:14 0.454239 AU
67953129 km
22.26 km/s
2044-Dec-10 07:41 0.427735 AU
63988297 km
22.28 km/s
2055-Nov-30 02:33 0.378707 AU
56653821 km
22.20 km/s
2066-Nov-16 13:52 0.305751 AU
45739719 km
22.10 km/s
2077-Nov-08 23:50 0.259526 AU
38824567 km
22.27 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
19.6

Orbit Quality

RMS
0.49104
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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