SpaceAtlas Space Object Data
NASA JPL SBDB · 2017 JK2

2017 JK2

2017 JK2 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 2.024 AU it takes 2.88 yr to circle the Sun.

Apollo Observations: 89
Orbital Period · P
2.88 yr
v(q)
74.9 km/s
v(Q)
5.9 km/s
Diameter · ≈
0.36 km
TJ
3.19
Eccentricity · e
0.8551

Orbit and dynamics

Between its closest point (0.293 AU) and its farthest (3.755 AU), the heliocentric distance changes by 3.462 AU over every revolution.

One full revolution takes 2.88 yr (1,052 days), computed from the semi-major axis of 2.024 AU.

The high eccentricity (0.855) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 16.81° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 74.9 km/s at perihelion and falls to 5.9 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 = 20 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.36 km.

Observation record and orbit quality

Astrometry from 89 individual observations underpins this orbit; the fit leaves an RMS residual of 0.6201 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
2.024 AU
Eccentricity
0.8551
Perihelion
0.293 AU
Aphelion
3.754722 AU
Inclination
16.81°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
76.54°

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
2028-Aug-03 16:38 0.188939 AU
28264842 km
32.85 km/s
2077-Aug-06 22:05 0.178879 AU
26759887 km
31.39 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
20.0

Orbit Quality

RMS
0.62013
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.