SpaceAtlas Space Object Data
NASA JPL SBDB · 2017 RP2

2017 RP2

2017 RP2 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.122 AU it takes 1.19 yr to circle the Sun.

Apollo Observations: 75
Orbital Period · P
1.19 yr
v(q)
33.5 km/s
v(Q)
23.6 km/s
Diameter · ≈
0.07 km
TJ
5.55
Eccentricity · e
0.172

Orbit and dynamics

Between its closest point (0.929 AU) and its farthest (1.315 AU), the heliocentric distance changes by 0.386 AU over every revolution.

One full revolution takes 1.19 yr (434 days), computed from the semi-major axis of 1.122 AU.

An eccentricity of 0.172 makes the orbit moderately elongated.

Its inclination of 2.22° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 33.5 km/s at perihelion and falls to 23.6 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 = 23.62 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.07 km.

Observation record and orbit quality

Astrometry from 75 individual observations underpins this orbit; the fit leaves an RMS residual of 0.5648 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
1.122 AU
Eccentricity
0.172
Perihelion
0.929 AU
Aphelion
1.314984 AU
Inclination
2.22°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
41.24°

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-Jul-19 09:47 0.284839 AU
42611279 km
5.48 km/s
2031-Mar-12 20:57 0.305110 AU
45643847 km
13.05 km/s
2036-Sep-29 23:48 0.149757 AU
22403376 km
1.96 km/s
2037-Jan-13 08:53 0.050354 AU
7532873 km
3.30 km/s
2042-Oct-10 12:39 0.272283 AU
40732923 km
11.97 km/s
2043-May-30 06:49 0.281191 AU
42065540 km
5.35 km/s
2049-Jul-21 13:49 0.280444 AU
41953861 km
5.41 km/s
2050-Mar-10 22:27 0.280494 AU
41961261 km
12.31 km/s
2055-Dec-14 02:50 0.057499 AU
8601787 km
3.32 km/s
2061-Oct-07 07:17 0.321466 AU
48090671 km
13.44 km/s
2062-Jun-05 03:14 0.288217 AU
43116582 km
5.52 km/s
2068-Jul-26 11:52 0.272951 AU
40832934 km
5.28 km/s
2069-Mar-07 23:38 0.240009 AU
35904827 km
11.11 km/s
2074-Nov-25 04:53 0.051370 AU
7684868 km
3.18 km/s
2075-Mar-28 17:54 0.166948 AU
24975129 km
2.37 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
23.62

Orbit Quality

RMS
0.56477
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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