SpaceAtlas Space Object Data
NASA JPL SBDB · 2017 YF5

2017 YF5

2017 YF5 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.644 AU it takes 2.11 yr to circle the Sun.

Apollo Observations: 77
Orbital Period · P
2.11 yr
v(q)
38.9 km/s
v(Q)
13.9 km/s
Diameter · ≈
0.42 km
TJ
4.07
Eccentricity · e
0.4744

Orbit and dynamics

The path is an ellipse reaching 0.864 AU from the Sun at perihelion and 2.424 AU at aphelion, a radial span of 1.56 AU.

Applying Kepler's third law to a = 1.644 AU gives an orbital period of 2.11 yr, or about 770 days.

The high eccentricity (0.474) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

A steep inclination of 23.26° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 38.9 km/s at perihelion and falls to 13.9 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 = 19.66 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.42 km.

Observation record and orbit quality

The current orbit solution is based on 77 observations and has a weighted RMS residual of 0.5357 arcseconds.

Condition code U = 1 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
1.644 AU
Eccentricity
0.4744
Perihelion
0.864 AU
Aphelion
2.423914 AU
Inclination
23.26°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
334.34°

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
2034-Dec-14 22:52 0.231449 AU
34624295 km
19.37 km/s
2037-Mar-02 02:57 0.360272 AU
53895942 km
16.89 km/s
2053-Dec-04 20:55 0.344787 AU
51579442 km
22.03 km/s
2056-Feb-12 00:11 0.273077 AU
40851711 km
16.30 km/s
2072-Nov-26 04:02 0.456712 AU
68323100 km
24.90 km/s
2075-Jan-27 11:25 0.191061 AU
28582351 km
15.94 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
19.66

Orbit Quality

RMS
0.53569
Condition
1
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.