SpaceAtlas Space Object Data
NASA JPL SBDB · 2018 RY7

2018 RY7

2018 RY7 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.017 AU it takes 1.03 yr to circle the Sun.

Apollo Observations: 97
Orbital Period · P
1.03 yr
v(q)
34.3 km/s
v(Q)
25.5 km/s
Diameter · ≈
0.05 km
TJ
5.97
Eccentricity · e
0.1472

Orbit and dynamics

The path is an ellipse reaching 0.867 AU from the Sun at perihelion and 1.167 AU at aphelion, a radial span of 0.3 AU.

Applying Kepler's third law to a = 1.017 AU gives an orbital period of 1.03 yr, or about 375 days.

An eccentricity of 0.147 makes the orbit moderately elongated.

The orbital plane is tilted 13.35° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 34.3 km/s at perihelion and falls to 25.5 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 = 24.4 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.05 km.

Observation record and orbit quality

The current orbit solution is based on 97 observations and has a weighted RMS residual of 0.3388 arcseconds.

Condition code U = 2 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
1.017 AU
Eccentricity
0.1472
Perihelion
0.867 AU
Aphelion
1.166702 AU
Inclination
13.35°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
61.09°

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
2055-Oct-13 07:05 0.497862 AU
74479042 km
19.09 km/s
2056-Oct-16 15:23 0.351824 AU
52632140 km
14.75 km/s
2057-Oct-17 19:11 0.214443 AU
32080289 km
10.85 km/s
2058-Oct-12 10:16 0.112806 AU
16875554 km
8.17 km/s
2059-Sep-28 20:09 0.119617 AU
17894501 km
7.32 km/s
2060-Feb-11 12:07 0.203494 AU
30442303 km
7.79 km/s
2060-Sep-08 07:41 0.191038 AU
28578835 km
7.26 km/s
2061-Mar-15 06:46 0.121109 AU
18117649 km
8.05 km/s
2061-Aug-11 11:38 0.254581 AU
38084838 km
6.59 km/s
2062-Apr-09 03:00 0.104172 AU
15583847 km
8.60 km/s
2063-Apr-29 01:37 0.203995 AU
30517189 km
10.74 km/s
2064-May-13 12:28 0.337821 AU
50537259 km
14.14 km/s
2065-May-25 19:57 0.479940 AU
71798042 km
18.11 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
24.4

Orbit Quality

RMS
0.33884
Condition
2
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.

Keep exploring

Explore asteroids, comets and near-Earth objects with JPL orbital data.