SpaceAtlas Space Object Data
NASA JPL SBDB · 2016 NB185

2016 NB185

2016 NB185 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.561 AU it takes 1.95 yr to circle the Sun.

Apollo Observations: 20
Orbital Period · P
1.95 yr
v(q)
35.1 km/s
v(Q)
16.2 km/s
Diameter · ≈
0.06 km
TJ
4.35
Eccentricity · e
0.3685

Orbit and dynamics

Between its closest point (0.986 AU) and its farthest (2.136 AU), the heliocentric distance changes by 1.15 AU over every revolution.

One full revolution takes 1.95 yr (712 days), computed from the semi-major axis of 1.561 AU.

An eccentricity of 0.368 makes the orbit moderately elongated.

Its inclination of 4.82° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 35.1 km/s at perihelion and falls to 16.2 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 = 23.82 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.06 km.

Observation record and orbit quality

Astrometry from 20 individual observations underpins this orbit; the fit leaves an RMS residual of 0.8005 arcseconds.

Condition code U = 5 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
1.561 AU
Eccentricity
0.3685
Perihelion
0.986 AU
Aphelion
2.136229 AU
Inclination
4.82°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
55.14°

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
2053-Mar-03 01:04 0.459829 AU
68789383 km
5.03 km/s
2053-Jul-19 09:16 0.224783 AU
33627045 km
14.03 km/s
2055-Jun-11 23:12 0.061306 AU
9171320 km
5.97 km/s
2057-Apr-01 20:09 0.181389 AU
27135456 km
12.10 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
23.82

Orbit Quality

RMS
0.80053
Condition
5
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

Explore asteroids, comets and near-Earth objects with JPL orbital data.