SpaceAtlas Space Object Data
NASA JPL SBDB · 2012 YK

2012 YK

2012 YK is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.759 AU and a period of 0.66 yr.

Aten Observations: 154
Orbital Period · P
0.66 yr
v(q)
51.3 km/s
v(Q)
22.8 km/s
Diameter · ≈
0.09 km
TJ
7.55
Eccentricity · e
0.3841

Orbit and dynamics

Between its closest point (0.467 AU) and its farthest (1.05 AU), the heliocentric distance changes by 0.583 AU over every revolution.

One full revolution takes 0.66 yr (241 days), computed from the semi-major axis of 0.759 AU.

An eccentricity of 0.384 makes the orbit moderately elongated.

The orbital plane is tilted 11.27° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 51.3 km/s at perihelion and falls to 22.8 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 = 23 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.09 km.

Observation record and orbit quality

Astrometry from 154 individual observations underpins this orbit; the fit leaves an RMS residual of 0.5176 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
0.7588 AU
Eccentricity
0.3841
Perihelion
0.467 AU
Aphelion
1.050255 AU
Inclination
11.27°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
331.62°

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
2026-Dec-22 17:39 0.489050 AU
73160819 km
25.58 km/s
2039-Nov-21 07:12 0.474758 AU
71022756 km
24.23 km/s
2041-Nov-17 10:20 0.383273 AU
57336758 km
20.88 km/s
2043-Nov-15 06:29 0.295167 AU
44156414 km
17.62 km/s
2044-Apr-13 01:47 0.495387 AU
74108884 km
16.62 km/s
2045-Nov-13 07:11 0.214258 AU
32052587 km
14.46 km/s
2046-Apr-01 22:25 0.468910 AU
70147897 km
13.85 km/s
2047-Nov-15 04:54 0.149003 AU
22290600 km
11.60 km/s
2048-Mar-18 17:43 0.433100 AU
64790796 km
10.28 km/s
2049-Nov-22 01:33 0.110676 AU
16556903 km
9.68 km/s
2051-Dec-05 08:43 0.089177 AU
13340627 km
9.05 km/s
2053-Dec-18 04:41 0.060528 AU
9054912 km
9.07 km/s
2055-Dec-28 13:30 0.034036 AU
5091739 km
9.86 km/s
2057-Aug-27 09:00 0.427743 AU
63989460 km
10.84 km/s
2058-Jan-01 10:52 0.082165 AU
12291748 km
11.80 km/s
2059-Aug-14 22:07 0.460672 AU
68915523 km
14.04 km/s
2060-Jan-02 04:48 0.165224 AU
24717188 km
14.58 km/s
2061-Aug-03 02:30 0.486135 AU
72724751 km
16.58 km/s
2061-Dec-30 18:06 0.256904 AU
38432355 km
17.66 km/s
2063-Dec-28 06:19 0.351773 AU
52624441 km
20.86 km/s
2065-Dec-24 06:20 0.447347 AU
66922202 km
24.16 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
23.0

Orbit Quality

RMS
0.51759
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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