SpaceAtlas Space Object Data
NASA JPL SBDB · 2015 AH

2015 AH

2015 AH is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.907 AU and a period of 0.86 yr.

Aten Observations: 90
Orbital Period · P
0.86 yr
v(q)
40 km/s
v(Q)
24.5 km/s
Diameter · ≈
0.17 km
TJ
6.52
Eccentricity · e
0.2405

Orbit and dynamics

Between its closest point (0.689 AU) and its farthest (1.125 AU), the heliocentric distance changes by 0.436 AU over every revolution.

One full revolution takes 0.86 yr (316 days), computed from the semi-major axis of 0.907 AU.

An eccentricity of 0.24 makes the orbit moderately elongated.

The orbital plane is tilted 14.07° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 40 km/s at perihelion and falls to 24.5 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 = 21.58 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.17 km.

Observation record and orbit quality

Astrometry from 90 individual observations underpins this orbit; the fit leaves an RMS residual of 0.4136 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
0.907 AU
Eccentricity
0.2405
Perihelion
0.689 AU
Aphelion
1.125134 AU
Inclination
14.07°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
194.88°

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-Jan-05 18:01 0.246562 AU
36885160 km
7.41 km/s
2028-Jun-10 14:34 0.248289 AU
37143438 km
10.06 km/s
2033-Dec-15 11:18 0.056918 AU
8514751 km
11.15 km/s
2034-Jul-26 15:01 0.353479 AU
52879685 km
11.34 km/s
2035-Apr-12 13:13 0.317157 AU
47446055 km
16.71 km/s
2039-Dec-29 03:48 0.365311 AU
54649756 km
19.99 km/s
2040-Sep-14 23:21 0.366920 AU
54890443 km
9.57 km/s
2041-May-09 01:33 0.164254 AU
24572050 km
9.91 km/s
2046-Dec-11 18:02 0.153328 AU
22937516 km
7.75 km/s
2047-Jun-28 10:36 0.294316 AU
44029044 km
10.71 km/s
2048-Apr-01 13:11 0.480491 AU
71880382 km
21.99 km/s
2052-Dec-20 01:44 0.167954 AU
25125534 km
14.28 km/s
2053-Aug-13 07:27 0.373462 AU
55869188 km
11.12 km/s
2054-Apr-19 19:07 0.228586 AU
34196016 km
13.68 km/s
2059-Jan-02 07:09 0.462780 AU
69230889 km
22.92 km/s
2059-Oct-05 03:43 0.339287 AU
50756554 km
8.35 km/s
2060-May-22 09:11 0.193088 AU
28885494 km
9.52 km/s
2065-Dec-12 03:18 0.075712 AU
11326396 km
8.95 km/s
2066-Jul-10 20:05 0.324534 AU
48549659 km
11.12 km/s
2067-Apr-06 12:25 0.408326 AU
61084721 km
19.69 km/s
2071-Dec-24 01:29 0.245292 AU
36695087 km
16.49 km/s
2072-Aug-25 10:43 0.377880 AU
56530117 km
10.72 km/s
2073-Apr-25 20:48 0.182646 AU
27323418 km
11.86 km/s
2078-Oct-30 06:55 0.292403 AU
43742903 km
7.29 km/s
2079-Jan-21 06:41 0.269054 AU
40249856 km
7.16 km/s
2079-Jun-06 05:52 0.233112 AU
34873100 km
9.84 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
21.58

Orbit Quality

RMS
0.41362
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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