SpaceAtlas Space Object Data
NASA JPL SBDB · 2020 QN4

2020 QN4

2020 QN4 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.07 AU it takes 1.11 yr to circle the Sun.

Apollo Observations: 30
Orbital Period · P
1.11 yr
v(q)
36.8 km/s
v(Q)
22.5 km/s
Diameter · ≈
0.01 km
TJ
5.74
Eccentricity · e
0.2411

Orbit and dynamics

The path is an ellipse reaching 0.812 AU from the Sun at perihelion and 1.328 AU at aphelion, a radial span of 0.516 AU.

Applying Kepler's third law to a = 1.07 AU gives an orbital period of 1.11 yr, or about 404 days.

An eccentricity of 0.241 makes the orbit moderately elongated.

Its inclination of 0.38° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 36.8 km/s at perihelion and falls to 22.5 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 = 28.6 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.01 km.

Observation record and orbit quality

The current orbit solution is based on 30 observations and has a weighted RMS residual of 0.4771 arcseconds.

Condition code U = 6 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
1.07 AU
Eccentricity
0.2411
Perihelion
0.812 AU
Aphelion
1.327977 AU
Inclination
0.38°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
149.99°

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-Feb-12 18:08 0.140427 AU
21007588 km
12.33 km/s
2029-Dec-12 23:29 0.315377 AU
47179683 km
7.29 km/s
2030-Jun-18 15:30 0.180892 AU
27061090 km
6.76 km/s
2030-Sep-26 19:23 0.222896 AU
33344732 km
5.37 km/s
2031-Sep-09 14:36 0.375871 AU
56229557 km
19.27 km/s
2039-Feb-01 05:19 0.401493 AU
60062492 km
20.65 km/s
2040-Jan-20 00:51 0.200027 AU
29923547 km
5.20 km/s
2040-Apr-19 13:25 0.168315 AU
25179548 km
6.59 km/s
2040-Nov-01 14:27 0.319536 AU
47801953 km
7.30 km/s
2041-Aug-28 04:04 0.101162 AU
15133577 km
11.45 km/s
2050-Feb-21 19:02 0.001172 AU
175313 km
7.16 km/s
2050-Nov-21 13:55 0.332792 AU
49784907 km
7.69 km/s
2051-Aug-18 02:58 0.002145 AU
320838 km
6.61 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
28.6

Orbit Quality

RMS
0.4771
Condition
6
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.

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