SpaceAtlas Space Object Data
NASA JPL SBDB · 2013 AT72

2013 AT72

2013 AT72 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.678 AU and a period of 0.56 yr.

Aten Observations: 70
Orbital Period · P
0.56 yr
v(q)
65.8 km/s
v(Q)
19.9 km/s
Diameter · ≈
0.05 km
TJ
8.26
Eccentricity · e
0.5356

Orbit and dynamics

The path is an ellipse reaching 0.315 AU from the Sun at perihelion and 1.042 AU at aphelion, a radial span of 0.727 AU.

Applying Kepler's third law to a = 0.678 AU gives an orbital period of 0.56 yr, or about 204 days.

The high eccentricity (0.536) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 15.02° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 65.8 km/s at perihelion and falls to 19.9 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 = 24.2 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.05 km.

Observation record and orbit quality

The current orbit solution is based on 70 observations and has a weighted RMS residual of 0.4169 arcseconds.

Condition code U = 1 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
0.6783 AU
Eccentricity
0.5356
Perihelion
0.315 AU
Aphelion
1.041597 AU
Inclination
15.02°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
201.71°

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-Jan-25 12:59 0.142481 AU
21314854 km
17.42 km/s
2027-Dec-22 05:47 0.222321 AU
33258777 km
17.85 km/s
2032-Jan-23 12:16 0.024853 AU
3717963 km
13.50 km/s
2032-Dec-24 13:13 0.346342 AU
51812099 km
22.95 km/s
2036-Jan-15 04:41 0.481740 AU
72067272 km
29.57 km/s
2037-Jan-11 23:46 0.069584 AU
10409606 km
12.19 km/s
2037-Dec-29 13:31 0.472476 AU
70681447 km
27.90 km/s
2041-Jan-19 17:22 0.346731 AU
51870283 km
24.62 km/s
2041-Dec-29 09:29 0.110211 AU
16487332 km
12.74 km/s
2046-Jan-24 04:16 0.210514 AU
31492397 km
19.76 km/s
2046-Dec-22 10:10 0.170406 AU
25492424 km
15.58 km/s
2051-Jan-25 15:39 0.080955 AU
12110646 km
15.35 km/s
2051-Dec-23 08:47 0.275598 AU
41228812 km
20.10 km/s
2056-Jan-20 00:43 0.033857 AU
5064867 km
12.68 km/s
2056-Dec-26 13:23 0.399853 AU
59817108 km
25.05 km/s
2060-Jan-17 20:41 0.418651 AU
62629314 km
27.23 km/s
2061-Jan-05 01:39 0.091296 AU
13657680 km
12.23 km/s
2065-Jan-22 08:02 0.271827 AU
40664768 km
21.91 km/s
2065-Dec-24 04:07 0.137524 AU
20573235 km
14.03 km/s
2070-Jan-25 14:21 0.128664 AU
19247928 km
16.92 km/s
2070-Dec-22 08:30 0.232957 AU
34849879 km
18.34 km/s
2075-Jan-22 19:41 0.022775 AU
3407147 km
13.29 km/s
2075-Dec-25 20:46 0.356579 AU
53343528 km
23.37 km/s
2079-Jan-15 16:14 0.469142 AU
70182688 km
29.09 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
24.2

Orbit Quality

RMS
0.41688
Condition
1
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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