SpaceAtlas Space Object Data
NASA JPL SBDB · 2020 BG9

2020 BG9

2020 BG9 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.1 AU it takes 1.15 yr to circle the Sun.

Apollo Observations: 33
Orbital Period · P
1.15 yr
v(q)
31.9 km/s
v(Q)
25.3 km/s
Diameter · ≈
0.02 km
TJ
5.6
Eccentricity · e
0.1159

Orbit and dynamics

Between its closest point (0.973 AU) and its farthest (1.227 AU), the heliocentric distance changes by 0.254 AU over every revolution.

One full revolution takes 1.15 yr (421 days), computed from the semi-major axis of 1.1 AU.

An eccentricity of 0.116 makes the orbit moderately elongated.

The orbital plane is tilted 18.6° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 31.9 km/s at perihelion and falls to 25.3 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 = 26.6 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.02 km.

Observation record and orbit quality

Astrometry from 33 individual observations underpins this orbit; the fit leaves an RMS residual of 0.4399 arcseconds.

Condition code U = 7 signals a poorly constrained orbit, so its future path should be treated as provisional.

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
1.1 AU
Eccentricity
0.1159
Perihelion
0.973 AU
Aphelion
1.22749 AU
Inclination
18.6°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
140.58°

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
2027-Jan-14 13:20 0.386412 AU
57806434 km
19.23 km/s
2028-Jul-11 18:03 0.360883 AU
53987301 km
16.58 km/s
2035-Jan-29 08:00 0.029486 AU
4411019 km
9.99 km/s
2042-Jan-16 16:59 0.171617 AU
25673588 km
17.55 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
26.6

Orbit Quality

RMS
0.4399
Condition
7
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.