SpaceAtlas Space Object Data
NASA JPL SBDB · 2021 RG6

2021 RG6

2021 RG6 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.04 AU it takes 1.06 yr to circle the Sun.

Apollo Observations: 52
Orbital Period · P
1.06 yr
v(q)
36 km/s
v(Q)
23.7 km/s
Diameter · ≈
0.01 km
TJ
5.87
Eccentricity · e
0.2054

Orbit and dynamics

The path is an ellipse reaching 0.827 AU from the Sun at perihelion and 1.254 AU at aphelion, a radial span of 0.427 AU.

Applying Kepler's third law to a = 1.04 AU gives an orbital period of 1.06 yr, or about 387 days.

An eccentricity of 0.205 makes the orbit moderately elongated.

The orbital plane is tilted 7.15° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 36 km/s at perihelion and falls to 23.7 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 = 28.92 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 52 observations and has a weighted RMS residual of 0.2852 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
1.04 AU
Eccentricity
0.2054
Perihelion
0.827 AU
Aphelion
1.253616 AU
Inclination
7.15°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
99.74°

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
2038-Sep-03 02:17 0.179401 AU
26837949 km
11.72 km/s
2039-Aug-17 05:19 0.181339 AU
27127996 km
4.46 km/s
2039-Nov-04 21:25 0.168653 AU
25230194 km
5.06 km/s
2040-May-28 23:16 0.271648 AU
40637895 km
5.54 km/s
2041-Mar-08 13:36 0.033461 AU
5005693 km
5.88 km/s
2042-Mar-27 05:03 0.325965 AU
48763595 km
16.01 km/s
2056-Sep-03 08:19 0.139629 AU
20888189 km
10.95 km/s
2057-Aug-10 17:56 0.184398 AU
27585514 km
4.57 km/s
2057-Nov-09 13:46 0.170874 AU
25562360 km
5.24 km/s
2058-May-27 15:11 0.266684 AU
39895384 km
5.53 km/s
2059-Mar-08 23:48 0.020336 AU
3042148 km
5.83 km/s
2060-Mar-26 01:26 0.301111 AU
45045565 km
15.60 km/s
2074-Aug-26 12:36 0.267326 AU
39991336 km
15.61 km/s
2075-Sep-12 17:52 0.002362 AU
353409 km
6.03 km/s
2076-Jun-26 22:28 0.265442 AU
39709525 km
5.51 km/s
2077-Apr-12 19:45 0.187512 AU
28051334 km
4.62 km/s
2078-Mar-18 08:18 0.154369 AU
23093221 km
11.12 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
28.92

Orbit Quality

RMS
0.28523
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.

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