SpaceAtlas Space Object Data
NASA JPL SBDB · 2016 RJ20

2016 RJ20

2016 RJ20 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.925 AU and a period of 0.89 yr.

Aten Observations: 61
Orbital Period · P
0.89 yr
v(q)
55.3 km/s
v(Q)
17.3 km/s
Diameter · ≈
0.07 km
TJ
6.34
Eccentricity · e
0.5224

Orbit and dynamics

Between its closest point (0.442 AU) and its farthest (1.408 AU), the heliocentric distance changes by 0.966 AU over every revolution.

One full revolution takes 0.89 yr (325 days), computed from the semi-major axis of 0.925 AU.

The high eccentricity (0.522) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 5.15° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 55.3 km/s at perihelion and falls to 17.3 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 = 23.65 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.07 km.

Observation record and orbit quality

Astrometry from 61 individual observations underpins this orbit; the fit leaves an RMS residual of 0.6187 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
0.9247 AU
Eccentricity
0.5224
Perihelion
0.442 AU
Aphelion
1.407763 AU
Inclination
5.15°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
69.99°

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
2026-Dec-10 13:08 0.222042 AU
33217068 km
11.09 km/s
2027-Nov-27 11:32 0.454582 AU
68004551 km
30.30 km/s
2032-Aug-31 05:02 0.030447 AU
4554833 km
15.26 km/s
2033-Oct-15 03:55 0.414854 AU
62061283 km
12.55 km/s
2034-Dec-09 22:11 0.226388 AU
33867119 km
11.07 km/s
2035-Nov-27 11:22 0.453377 AU
67824260 km
30.26 km/s
2040-Aug-30 22:02 0.052351 AU
7831544 km
14.62 km/s
2041-Oct-17 02:16 0.417259 AU
62421056 km
12.58 km/s
2042-Dec-12 09:30 0.202501 AU
30293687 km
11.31 km/s
2043-Nov-26 00:42 0.483951 AU
72398107 km
31.29 km/s
2048-Aug-30 18:38 0.094170 AU
14087690 km
13.47 km/s
2049-Oct-20 09:47 0.419946 AU
62822962 km
12.62 km/s
2050-Dec-14 22:42 0.164263 AU
24573366 km
12.06 km/s
2056-Aug-31 14:53 0.141853 AU
21220979 km
12.33 km/s
2057-Oct-24 03:20 0.420654 AU
62928950 km
12.63 km/s
2058-Dec-15 21:07 0.124104 AU
18565632 km
13.29 km/s
2063-Sep-19 03:19 0.456722 AU
68324683 km
30.51 km/s
2064-Sep-02 22:35 0.185709 AU
27781695 km
11.56 km/s
2065-Oct-27 15:09 0.418987 AU
62679499 km
12.61 km/s
2066-Dec-15 15:01 0.095046 AU
14218638 km
14.60 km/s
2071-Sep-17 09:52 0.417019 AU
62385100 km
29.19 km/s
2072-Sep-06 02:03 0.220343 AU
32962833 km
11.23 km/s
2073-Oct-30 15:07 0.415494 AU
62156992 km
12.57 km/s
2074-Dec-14 21:23 0.083440 AU
12482400 km
15.78 km/s
2079-Sep-15 22:43 0.383017 AU
57298502 km
28.07 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
23.65

Orbit Quality

RMS
0.61873
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.

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