SpaceAtlas Space Object Data
NASA JPL SBDB · 2017 TK1

2017 TK1

2017 TK1 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 2.243 AU it takes 3.36 yr to circle the Sun.

Apollo Observations: 131
Orbital Period · P
3.36 yr
v(q)
37.9 km/s
v(Q)
10.4 km/s
Diameter · ≈
0.21 km
TJ
3.38
Eccentricity · e
0.5686

Orbit and dynamics

Between its closest point (0.967 AU) and its farthest (3.518 AU), the heliocentric distance changes by 2.551 AU over every revolution.

One full revolution takes 3.36 yr (1,227 days), computed from the semi-major axis of 2.243 AU.

The high eccentricity (0.569) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 9.93° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 37.9 km/s at perihelion and falls to 10.4 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 = 21.14 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.21 km.

Observation record and orbit quality

Astrometry from 131 individual observations underpins this orbit; the fit leaves an RMS residual of 0.4686 arcseconds.

Condition code U = 4 indicates a moderately constrained orbit; predictions decades ahead still carry noticeable uncertainty.

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
2.243 AU
Eccentricity
0.5686
Perihelion
0.967 AU
Aphelion
3.51837 AU
Inclination
9.93°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
214.55°

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-Nov-14 22:07 0.482033 AU
72111045 km
23.86 km/s
2044-Jul-07 15:42 0.448314 AU
67066856 km
22.48 km/s
2054-Aug-26 14:46 0.067784 AU
10140395 km
10.47 km/s
2064-Nov-03 00:26 0.278349 AU
41640459 km
18.10 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
21.14

Orbit Quality

RMS
0.46862
Condition
4
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.