SpaceAtlas Space Object Data
NASA JPL SBDB · 2005 KA

2005 KA

2005 KA is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.842 AU and a period of 0.77 yr.

Aten Observations: 69
Orbital Period · P
0.77 yr
v(q)
40.3 km/s
v(Q)
26.2 km/s
Diameter · ≈
0.04 km
TJ
6.97
Eccentricity · e
0.2127

Orbit and dynamics

Between its closest point (0.662 AU) and its farthest (1.02 AU), the heliocentric distance changes by 0.358 AU over every revolution.

One full revolution takes 0.77 yr (282 days), computed from the semi-major axis of 0.842 AU.

An eccentricity of 0.213 makes the orbit moderately elongated.

Its inclination of 2.97° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 40.3 km/s at perihelion and falls to 26.2 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 = 24.7 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.04 km.

Observation record and orbit quality

Astrometry from 69 individual observations underpins this orbit; the fit leaves an RMS residual of 0.5527 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
0.8415 AU
Eccentricity
0.2127
Perihelion
0.662 AU
Aphelion
1.020487 AU
Inclination
2.97°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
305.82°

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-Nov-18 12:38 0.324823 AU
48592788 km
10.24 km/s
2032-May-20 23:14 0.014743 AU
2205588 km
3.99 km/s
2035-Apr-15 04:31 0.385437 AU
57660591 km
16.10 km/s
2035-Oct-01 01:06 0.313999 AU
46973630 km
9.14 km/s
2038-Dec-08 10:22 0.312787 AU
46792207 km
9.51 km/s
2039-May-28 02:51 0.383256 AU
57334315 km
16.08 km/s
2042-Apr-19 11:15 0.012933 AU
1934731 km
3.99 km/s
2045-Oct-22 21:00 0.326094 AU
48783018 km
10.17 km/s
2049-Jan-14 18:40 0.251817 AU
37671248 km
5.98 km/s
2049-Jun-03 05:15 0.161642 AU
24181333 km
8.97 km/s
2052-Apr-09 20:31 0.268044 AU
40098815 km
12.36 km/s
2052-Sep-12 00:20 0.287408 AU
42995697 km
7.58 km/s
2055-Nov-30 11:02 0.317454 AU
47490390 km
9.85 km/s
2056-May-25 07:15 0.434767 AU
65040248 km
17.65 km/s
2059-Apr-22 13:57 0.010564 AU
1580383 km
3.88 km/s
2062-Oct-24 11:19 0.324144 AU
48491240 km
10.13 km/s
2066-Jan-24 16:29 0.228678 AU
34209749 km
4.74 km/s
2066-Jun-02 19:33 0.115208 AU
17234802 km
7.52 km/s
2069-Apr-12 14:54 0.342339 AU
51213225 km
14.84 km/s
2069-Sep-25 05:53 0.302170 AU
45203924 km
8.65 km/s
2072-Dec-18 03:10 0.293045 AU
43838917 km
8.54 km/s
2073-May-29 14:15 0.302370 AU
45233848 km
13.64 km/s
2076-Apr-06 04:46 0.148306 AU
22186283 km
8.75 km/s
2076-Aug-20 18:38 0.245695 AU
36755468 km
5.33 km/s
2079-Nov-20 16:14 0.320434 AU
47936236 km
10.08 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
24.7

Orbit Quality

RMS
0.55269
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.

Keep exploring

Explore asteroids, comets and near-Earth objects with JPL orbital data.