SpaceAtlas Space Object Data
NASA JPL SBDB · 2019 WB7

2019 WB7

2019 WB7 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.802 AU and a period of 0.72 yr.

Aten Observations: 43
Orbital Period · P
0.72 yr
v(q)
45 km/s
v(Q)
24.6 km/s
Diameter · ≈
0.04 km
TJ
7.24
Eccentricity · e
0.2936

Orbit and dynamics

Between its closest point (0.566 AU) and its farthest (1.037 AU), the heliocentric distance changes by 0.471 AU over every revolution.

One full revolution takes 0.72 yr (262 days), computed from the semi-major axis of 0.802 AU.

An eccentricity of 0.294 makes the orbit moderately elongated.

Its inclination of 1.62° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 45 km/s at perihelion and falls to 24.6 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 = 24.75 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.04 km.

Observation record and orbit quality

Astrometry from 43 individual observations underpins this orbit; the fit leaves an RMS residual of 0.3861 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
0.8017 AU
Eccentricity
0.2936
Perihelion
0.566 AU
Aphelion
1.037079 AU
Inclination
1.62°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
230.34°

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-Oct-23 12:39 0.070738 AU
10582188 km
8.82 km/s
2042-Dec-27 01:49 0.106366 AU
15912061 km
10.12 km/s
2047-Dec-14 14:39 0.031506 AU
4713215 km
5.87 km/s
2052-Oct-27 08:25 0.020014 AU
2994072 km
6.78 km/s
2065-Dec-26 01:48 0.038574 AU
5770621 km
7.86 km/s
2070-Nov-16 05:27 0.047759 AU
7144644 km
5.66 km/s
2075-Oct-23 23:37 0.089044 AU
13320779 km
9.48 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
24.75

Orbit Quality

RMS
0.38609
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

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