SpaceAtlas Space Object Data
NASA JPL SBDB · 2018 YF2

2018 YF2

2018 YF2 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.876 AU and a period of 0.82 yr.

Aten Observations: 98
Orbital Period · P
0.82 yr
v(q)
44.1 km/s
v(Q)
23 km/s
Diameter · ≈
0.24 km
TJ
6.46
Eccentricity · e
0.3146

Orbit and dynamics

The path is an ellipse reaching 0.6 AU from the Sun at perihelion and 1.151 AU at aphelion, a radial span of 0.551 AU.

Applying Kepler's third law to a = 0.876 AU gives an orbital period of 0.82 yr, or about 299 days.

An eccentricity of 0.315 makes the orbit moderately elongated.

A steep inclination of 48.67° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 44.1 km/s at perihelion and falls to 23 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 = 20.85 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.24 km.

Observation record and orbit quality

The current orbit solution is based on 98 observations and has a weighted RMS residual of 0.5125 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
0.8756 AU
Eccentricity
0.3146
Perihelion
0.6 AU
Aphelion
1.151064 AU
Inclination
48.67°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
254.16°

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
2027-Dec-19 06:39 0.374643 AU
56045865 km
23.58 km/s
2032-Jun-14 21:17 0.392908 AU
58778162 km
31.99 km/s
2032-Dec-17 12:47 0.098823 AU
14783724 km
24.29 km/s
2036-Dec-18 02:53 0.426264 AU
63768180 km
23.95 km/s
2037-Dec-07 16:36 0.487242 AU
72890354 km
32.01 km/s
2041-Jun-20 02:01 0.389614 AU
58285448 km
32.07 km/s
2041-Dec-18 11:17 0.089750 AU
13426356 km
23.81 km/s
2045-Dec-17 22:30 0.475159 AU
71082791 km
24.34 km/s
2046-Dec-09 18:31 0.430536 AU
64407279 km
30.64 km/s
2050-Jun-25 06:53 0.393165 AU
58816670 km
32.19 km/s
2050-Dec-19 05:41 0.112875 AU
16885857 km
23.44 km/s
2055-Dec-11 19:41 0.371871 AU
55631040 km
29.34 km/s
2059-Jun-30 17:31 0.404336 AU
60487808 km
32.37 km/s
2059-Dec-19 20:43 0.156645 AU
23433833 km
23.20 km/s
2064-May-24 03:23 0.475017 AU
71061579 km
31.97 km/s
2064-Dec-12 19:35 0.309637 AU
46321081 km
28.03 km/s
2068-Jul-05 13:05 0.423995 AU
63428705 km
32.61 km/s
2068-Dec-19 07:16 0.210813 AU
31537217 km
23.11 km/s
2073-May-30 10:10 0.443828 AU
66395788 km
31.93 km/s
2073-Dec-14 17:10 0.244983 AU
36649008 km
26.79 km/s
2077-Jul-11 15:03 0.452192 AU
67646980 km
32.93 km/s
2077-Dec-19 12:41 0.270812 AU
40512949 km
23.18 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
20.85

Orbit Quality

RMS
0.51251
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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