SpaceAtlas Space Object Data
NASA JPL SBDB · 2015 YN1

2015 YN1

2015 YN1 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.754 AU once every 2.32 yr.

Amor Observations: 159
Orbital Period · P
2.32 yr
v(q)
32 km/s
v(Q)
15.8 km/s
Diameter · ≈
0.21 km
TJ
4.04
Eccentricity · e
0.3379

Orbit and dynamics

Between its closest point (1.161 AU) and its farthest (2.347 AU), the heliocentric distance changes by 1.186 AU over every revolution.

One full revolution takes 2.32 yr (848 days), computed from the semi-major axis of 1.754 AU.

An eccentricity of 0.338 makes the orbit moderately elongated.

The orbital plane is tilted 9.49° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 32 km/s at perihelion and falls to 15.8 km/s at aphelion.

Its perihelion lies just outside Earth's orbit, which is why it is classed as Earth-approaching rather than Earth-crossing.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 21.15 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.21 km.

Observation record and orbit quality

Astrometry from 159 individual observations underpins this orbit; the fit leaves an RMS residual of 0.5105 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
1.754 AU
Eccentricity
0.3379
Perihelion
1.161 AU
Aphelion
2.346677 AU
Inclination
9.49°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
167.31°

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-Mar-27 20:23 0.444917 AU
66558688 km
5.26 km/s
2066-Dec-03 13:32 0.451342 AU
67519746 km
4.79 km/s
2073-Dec-27 06:40 0.337371 AU
50469971 km
2.17 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
21.15

Orbit Quality

RMS
0.51051
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.

Keep exploring

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