SpaceAtlas Space Object Data
NASA JPL SBDB · 2020 BA11

2020 BA11

2020 BA11 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.295 AU it takes 1.47 yr to circle the Sun.

Apollo Observations: 29
Orbital Period · P
1.47 yr
v(q)
40.8 km/s
v(Q)
16.8 km/s
Diameter · ≈
0.16 km
TJ
4.81
Eccentricity · e
0.4162

Orbit and dynamics

The path is an ellipse reaching 0.756 AU from the Sun at perihelion and 1.834 AU at aphelion, a radial span of 1.078 AU.

Applying Kepler's third law to a = 1.295 AU gives an orbital period of 1.47 yr, or about 538 days.

The high eccentricity (0.416) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

A steep inclination of 29.23° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 40.8 km/s at perihelion and falls to 16.8 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 = 21.7 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.16 km.

Observation record and orbit quality

The current orbit solution is based on 29 observations and has a weighted RMS residual of 0.4718 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
1.295 AU
Eccentricity
0.4162
Perihelion
0.756 AU
Aphelion
1.833979 AU
Inclination
29.23°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
47.92°

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
2039-Aug-14 11:25 0.383529 AU
57375159 km
26.04 km/s
2042-Jul-23 13:18 0.177840 AU
26604433 km
20.71 km/s
2045-Jun-25 05:13 0.260266 AU
38935205 km
18.73 km/s
2048-Jan-28 09:55 0.400182 AU
59866418 km
15.91 km/s
2048-May-17 03:02 0.444328 AU
66470531 km
18.04 km/s
2051-Feb-02 21:02 0.337152 AU
50437163 km
18.37 km/s
2054-Jan-29 13:09 0.464871 AU
69543641 km
24.75 km/s
2070-Aug-04 12:58 0.267937 AU
40082845 km
23.16 km/s
2073-Jul-12 01:11 0.175509 AU
26255729 km
19.41 km/s
2076-Jan-22 16:47 0.482125 AU
72124878 km
15.84 km/s
2076-Jun-10 23:45 0.338653 AU
50661819 km
18.70 km/s
2079-Jan-31 11:30 0.359825 AU
53829045 km
16.39 km/s
2079-Apr-23 19:40 0.489703 AU
73258535 km
14.90 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
21.7

Orbit Quality

RMS
0.47185
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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