SpaceAtlas Space Object Data
NASA JPL SBDB · 2017 KN27

2017 KN27

2017 KN27 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.178 AU it takes 1.28 yr to circle the Sun.

Apollo Observations: 76
Orbital Period · P
1.28 yr
v(q)
39.9 km/s
v(Q)
18.9 km/s
Diameter · ≈
0.03 km
TJ
5.2
Eccentricity · e
0.3571

Orbit and dynamics

The path is an ellipse reaching 0.757 AU from the Sun at perihelion and 1.599 AU at aphelion, a radial span of 0.842 AU.

Applying Kepler's third law to a = 1.178 AU gives an orbital period of 1.28 yr, or about 467 days.

An eccentricity of 0.357 makes the orbit moderately elongated.

A steep inclination of 27.77° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 39.9 km/s at perihelion and falls to 18.9 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 = 25.4 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.03 km.

Observation record and orbit quality

The current orbit solution is based on 76 observations and has a weighted RMS residual of 0.5034 arcseconds.

Condition code U = 7 signals a poorly constrained orbit, so its future path should be treated as provisional.

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
1.178 AU
Eccentricity
0.3571
Perihelion
0.757 AU
Aphelion
1.598664 AU
Inclination
27.77°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
76.37°

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
2029-Nov-08 03:46 0.275260 AU
41178292 km
28.71 km/s
2043-Nov-23 20:41 0.038173 AU
5710564 km
19.62 km/s
2049-May-13 12:21 0.100215 AU
14991903 km
14.37 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
25.4

Orbit Quality

RMS
0.50337
Condition
7
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.

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