SpaceAtlas Space Object Data
NASA JPL SBDB · 2019 RK

2019 RK

2019 RK belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.151 AU it takes 1.23 yr to circle the Sun.

Apollo Observations: 90
Orbital Period · P
1.23 yr
v(q)
31.7 km/s
v(Q)
24.4 km/s
Diameter · ≈
0.03 km
TJ
5.45
Eccentricity · e
0.1303

Orbit and dynamics

Between its closest point (1.001 AU) and its farthest (1.301 AU), the heliocentric distance changes by 0.3 AU over every revolution.

One full revolution takes 1.23 yr (451 days), computed from the semi-major axis of 1.151 AU.

An eccentricity of 0.13 makes the orbit moderately elongated.

Its inclination of 4.71° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 31.7 km/s at perihelion and falls to 24.4 km/s at aphelion.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 25.26 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.03 km.

Observation record and orbit quality

Astrometry from 90 individual observations underpins this orbit; the fit leaves an RMS residual of 0.4238 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
1.151 AU
Eccentricity
0.1303
Perihelion
1.001 AU
Aphelion
1.300975 AU
Inclination
4.71°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
111.04°

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
2030-May-17 06:05 0.301057 AU
45037474 km
5.21 km/s
2035-Jul-15 07:15 0.241093 AU
36066943 km
3.71 km/s
2035-Dec-28 06:36 0.312496 AU
46748695 km
10.90 km/s
2040-Oct-05 11:17 0.057926 AU
8665534 km
4.17 km/s
2041-Jan-12 20:26 0.118534 AU
17732508 km
1.71 km/s
2045-Sep-13 07:43 0.495051 AU
74058542 km
16.74 km/s
2046-Apr-14 02:57 0.274295 AU
41034000 km
5.15 km/s
2051-Jun-15 06:31 0.283450 AU
42403574 km
4.63 km/s
2052-Jan-07 01:02 0.488222 AU
73036988 km
16.19 km/s
2056-Oct-08 17:51 0.066475 AU
9944563 km
2.52 km/s
2061-Sep-21 13:57 0.336769 AU
50379865 km
12.15 km/s
2062-Mar-21 15:13 0.237650 AU
35551886 km
4.67 km/s
2067-May-14 16:27 0.300356 AU
44932625 km
5.25 km/s
2072-Jul-12 19:31 0.243216 AU
36384655 km
3.81 km/s
2072-Dec-29 07:04 0.319975 AU
47867544 km
11.27 km/s
2077-Oct-05 17:44 0.058071 AU
8687345 km
4.27 km/s
2078-Jan-17 00:41 0.117916 AU
17639927 km
1.94 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
25.26

Orbit Quality

RMS
0.42384
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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