SpaceAtlas Space Object Data
NASA JPL SBDB · 2012 TT5

2012 TT5

2012 TT5 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 2.077 AU it takes 2.99 yr to circle the Sun.

Apollo Observations: 197
Orbital Period · P
2.99 yr
v(q)
45.2 km/s
v(Q)
9.5 km/s
Diameter · ≈
0.15 km
TJ
3.43
Eccentricity · e
0.6536

Orbit and dynamics

The path is an ellipse reaching 0.719 AU from the Sun at perihelion and 3.435 AU at aphelion, a radial span of 2.716 AU.

Applying Kepler's third law to a = 2.077 AU gives an orbital period of 2.99 yr, or about 1,093 days.

The high eccentricity (0.654) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 15.24° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 45.2 km/s at perihelion and falls to 9.5 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 = 21.9 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.15 km.

Observation record and orbit quality

The current orbit solution is based on 197 observations and has a weighted RMS residual of 0.469 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
2.077 AU
Eccentricity
0.6536
Perihelion
0.719 AU
Aphelion
3.434527 AU
Inclination
15.24°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
224.76°

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-Sep-01 17:08 0.249805 AU
37370358 km
13.59 km/s
2030-Aug-17 18:21 0.303682 AU
45430115 km
13.75 km/s
2033-Aug-05 03:40 0.336633 AU
50359558 km
14.63 km/s
2036-Jul-22 15:33 0.361121 AU
54023001 km
15.45 km/s
2039-Jul-19 12:06 0.363750 AU
54416270 km
15.53 km/s
2042-Jul-09 21:46 0.371332 AU
55550404 km
15.78 km/s
2045-Jul-02 02:22 0.371757 AU
55614091 km
15.74 km/s
2048-Jun-21 22:30 0.364632 AU
54548171 km
15.32 km/s
2051-Jun-20 14:08 0.359871 AU
53835884 km
15.05 km/s
2054-Jun-14 12:51 0.352207 AU
52689387 km
14.68 km/s
2057-Jun-10 00:03 0.344658 AU
51560035 km
14.32 km/s
2060-Jun-02 05:36 0.329054 AU
49225826 km
13.68 km/s
2063-Jun-05 23:20 0.333235 AU
49851207 km
13.80 km/s
2066-Jun-05 19:51 0.333927 AU
49954708 km
13.84 km/s
2069-Jun-07 16:04 0.337975 AU
50560409 km
14.00 km/s
2072-Jun-06 13:57 0.336257 AU
50303306 km
13.93 km/s
2075-Jun-14 07:15 0.346293 AU
51804706 km
14.32 km/s
2078-Jun-19 10:59 0.354512 AU
53034294 km
14.74 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
21.9

Orbit Quality

RMS
0.46901
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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