SpaceAtlas Space Object Data
NASA JPL SBDB · 2014 WF497

2014 WF497

2014 WF497 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.11 AU it takes 1.17 yr to circle the Sun.

Apollo Observations: 129
Orbital Period · P
1.17 yr
v(q)
35.4 km/s
v(Q)
22.6 km/s
Diameter · ≈
0.3 km
TJ
5.48
Eccentricity · e
0.2218

Orbit and dynamics

The path is an ellipse reaching 0.864 AU from the Sun at perihelion and 1.356 AU at aphelion, a radial span of 0.492 AU.

Applying Kepler's third law to a = 1.11 AU gives an orbital period of 1.17 yr, or about 427 days.

An eccentricity of 0.222 makes the orbit moderately elongated.

A steep inclination of 28.4° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 35.4 km/s at perihelion and falls to 22.6 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 = 20.34 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.3 km.

Observation record and orbit quality

The current orbit solution is based on 129 observations and has a weighted RMS residual of 0.6334 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
1.11 AU
Eccentricity
0.2218
Perihelion
0.864 AU
Aphelion
1.356198 AU
Inclination
28.4°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
40.67°

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-Jul-10 14:36 0.146681 AU
21943233 km
15.64 km/s
2029-Jan-01 21:34 0.294312 AU
44028520 km
14.55 km/s
2035-Jul-19 15:44 0.234593 AU
35094611 km
15.63 km/s
2035-Dec-29 22:36 0.245964 AU
36795627 km
14.69 km/s
2042-Jul-29 05:21 0.328341 AU
49119173 km
16.07 km/s
2042-Dec-26 13:02 0.211712 AU
31671658 km
15.00 km/s
2049-Aug-10 11:58 0.422584 AU
63217691 km
16.75 km/s
2049-Dec-23 23:04 0.206335 AU
30867210 km
15.67 km/s
2055-Jun-02 19:51 0.475396 AU
71118295 km
24.63 km/s
2056-Dec-22 06:55 0.238560 AU
35688090 km
16.75 km/s
2062-Jun-08 19:04 0.370594 AU
55440104 km
22.24 km/s
2063-Dec-22 15:33 0.301677 AU
45130184 km
18.36 km/s
2069-Jun-15 01:59 0.264860 AU
39622465 km
20.03 km/s
2070-Dec-23 02:46 0.382950 AU
57288436 km
20.38 km/s
2076-Jun-21 13:41 0.165068 AU
24693852 km
18.18 km/s
2077-Jan-15 10:04 0.444668 AU
66521396 km
14.50 km/s
2077-Dec-24 09:49 0.470943 AU
70452126 km
22.70 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
20.34

Orbit Quality

RMS
0.63342
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.

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