SpaceAtlas Space Object Data
NASA JPL SBDB · 2015 OB22

2015 OB22

2015 OB22 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.167 AU it takes 1.26 yr to circle the Sun.

Apollo Observations: 39
Orbital Period · P
1.26 yr
v(q)
38.8 km/s
v(Q)
19.6 km/s
Diameter · ≈
0.18 km
TJ
5.27
Eccentricity · e
0.3298

Orbit and dynamics

Between its closest point (0.782 AU) and its farthest (1.552 AU), the heliocentric distance changes by 0.77 AU over every revolution.

One full revolution takes 1.26 yr (460 days), computed from the semi-major axis of 1.167 AU.

An eccentricity of 0.33 makes the orbit moderately elongated.

A steep inclination of 24.47° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 38.8 km/s at perihelion and falls to 19.6 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 = 21.5 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.18 km.

Observation record and orbit quality

Astrometry from 39 individual observations underpins this orbit; the fit leaves an RMS residual of 0.3845 arcseconds.

Condition code U = 1 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
1.167 AU
Eccentricity
0.3298
Perihelion
0.782 AU
Aphelion
1.551877 AU
Inclination
24.47°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
111.85°

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
2050-Jan-25 08:58 0.172745 AU
25842303 km
15.47 km/s
2055-Feb-17 06:04 0.168245 AU
25169052 km
17.66 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
21.5

Orbit Quality

RMS
0.38448
Condition
1
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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