SpaceAtlas Space Object Data
NASA JPL SBDB · 2019 RH

2019 RH

2019 RH belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.028 AU it takes 1.04 yr to circle the Sun.

Apollo Observations: 29
Orbital Period · P
1.04 yr
v(q)
55.5 km/s
v(Q)
15.5 km/s
Diameter · ≈
0.02 km
TJ
5.8
Eccentricity · e
0.5623

Orbit and dynamics

Between its closest point (0.45 AU) and its farthest (1.606 AU), the heliocentric distance changes by 1.156 AU over every revolution.

One full revolution takes 1.04 yr (381 days), computed from the semi-major axis of 1.028 AU.

The high eccentricity (0.562) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

Its inclination of 3.23° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 55.5 km/s at perihelion and falls to 15.5 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 = 26 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.02 km.

Observation record and orbit quality

Astrometry from 29 individual observations underpins this orbit; the fit leaves an RMS residual of 0.2415 arcseconds.

Condition code U = 8 signals a poorly constrained orbit, so its future path should be treated as provisional.

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
1.028 AU
Eccentricity
0.5623
Perihelion
0.45 AU
Aphelion
1.606044 AU
Inclination
3.23°
Orbital Period
— yr
Epoch
2458731.5
Mean Anomaly
298.81°

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
2027-May-12 23:09 0.123883 AU
18532665 km
11.14 km/s
2028-May-12 17:43 0.055395 AU
8286983 km
17.44 km/s
2029-May-23 12:56 0.097103 AU
14526388 km
25.29 km/s
2065-Aug-25 06:48 0.266493 AU
39866735 km
28.66 km/s
2066-Sep-05 19:55 0.031613 AU
4729241 km
20.59 km/s
2067-Sep-13 06:52 0.091383 AU
13670769 km
13.01 km/s
2068-Aug-26 09:22 0.355703 AU
53212447 km
11.53 km/s
2068-Nov-04 13:56 0.393279 AU
58833689 km
13.28 km/s
2073-Jun-10 06:32 0.435765 AU
65189540 km
12.50 km/s
2075-May-11 03:09 0.052806 AU
7899631 km
14.99 km/s
2076-May-20 00:45 0.055356 AU
8281152 km
22.82 km/s
2077-May-31 21:29 0.243207 AU
36383286 km
30.86 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
26.0

Orbit Quality

RMS
0.24149
Condition
8
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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