SpaceAtlas Space Object Data
NASA JPL SBDB · 2015 RW35

2015 RW35

2015 RW35 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.231 AU it takes 1.37 yr to circle the Sun.

Apollo Observations: 21
Orbital Period · P
1.37 yr
v(q)
35 km/s
v(Q)
20.6 km/s
Diameter · ≈
0.01 km
TJ
5.17
Eccentricity · e
0.2603

Orbit and dynamics

The path is an ellipse reaching 0.911 AU from the Sun at perihelion and 1.551 AU at aphelion, a radial span of 0.64 AU.

Applying Kepler's third law to a = 1.231 AU gives an orbital period of 1.37 yr, or about 499 days.

An eccentricity of 0.26 makes the orbit moderately elongated.

Its inclination of 3.41° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 35 km/s at perihelion and falls to 20.6 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 = 29.2 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 21 observations and has a weighted RMS residual of 0.4241 arcseconds.

Condition code U = 7 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
1.231 AU
Eccentricity
0.2603
Perihelion
0.911 AU
Aphelion
1.551429 AU
Inclination
3.41°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
275.65°

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-Apr-04 03:44 0.474665 AU
71008915 km
8.31 km/s
2034-Jun-15 07:25 0.454562 AU
68001504 km
7.78 km/s
2035-Jan-28 02:47 0.337137 AU
50434985 km
19.04 km/s
2041-Aug-20 05:33 0.228965 AU
34252702 km
15.96 km/s
2042-Mar-23 09:48 0.417836 AU
62507434 km
7.72 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
29.2

Orbit Quality

RMS
0.4241
Condition
7
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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