SpaceAtlas Space Object Data
NASA JPL SBDB · 2004 KF15

2004 KF15

2004 KF15 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.83 AU once every 2.48 yr.

Amor Observations: 125
Orbital Period · P
2.48 yr
v(q)
31.9 km/s
v(Q)
15.2 km/s
Diameter · ≈
0.23 km
TJ
3.93
Eccentricity · e
0.3544

Orbit and dynamics

Between its closest point (1.181 AU) and its farthest (2.479 AU), the heliocentric distance changes by 1.298 AU over every revolution.

One full revolution takes 2.48 yr (904 days), computed from the semi-major axis of 1.83 AU.

An eccentricity of 0.354 makes the orbit moderately elongated.

The orbital plane is tilted 11.07° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 31.9 km/s at perihelion and falls to 15.2 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 = 20.93 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.23 km.

Observation record and orbit quality

Astrometry from 125 individual observations underpins this orbit; the fit leaves an RMS residual of 0.5619 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
1.83 AU
Eccentricity
0.3544
Perihelion
1.181 AU
Aphelion
2.478552 AU
Inclination
11.07°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
317.16°

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
2051-May-25 19:53 0.278218 AU
41620891 km
5.94 km/s
2056-Jun-01 06:41 0.212432 AU
31779377 km
7.13 km/s
2061-Jun-02 20:28 0.433765 AU
64890323 km
11.30 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
20.93

Orbit Quality

RMS
0.56195
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.

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