SpaceAtlas Space Object Data
NASA JPL SBDB · 2016 TH56

2016 TH56

2016 TH56 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.222 AU it takes 1.35 yr to circle the Sun.

Apollo Observations: 63
Orbital Period · P
1.35 yr
v(q)
32.6 km/s
v(Q)
22.3 km/s
Diameter · ≈
0.13 km
TJ
5.18
Eccentricity · e
0.1891

Orbit and dynamics

Between its closest point (0.991 AU) and its farthest (1.453 AU), the heliocentric distance changes by 0.462 AU over every revolution.

One full revolution takes 1.35 yr (493 days), computed from the semi-major axis of 1.222 AU.

An eccentricity of 0.189 makes the orbit moderately elongated.

The orbital plane is tilted 13.7° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 32.6 km/s at perihelion and falls to 22.3 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 = 22.2 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.13 km.

Observation record and orbit quality

Astrometry from 63 individual observations underpins this orbit; the fit leaves an RMS residual of 0.5722 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
1.222 AU
Eccentricity
0.1891
Perihelion
0.991 AU
Aphelion
1.45308 AU
Inclination
13.7°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
322.97°

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-Aug-06 11:21 0.495469 AU
74121044 km
8.20 km/s
2032-Jul-02 23:26 0.488686 AU
73106364 km
6.50 km/s
2036-Apr-23 01:47 0.362483 AU
54226626 km
6.57 km/s
2039-Nov-18 17:14 0.244441 AU
36567809 km
6.60 km/s
2040-Mar-18 13:32 0.057901 AU
8661924 km
7.72 km/s
2043-Oct-14 05:16 0.302502 AU
45253715 km
8.06 km/s
2044-Mar-30 17:31 0.302479 AU
45250155 km
13.96 km/s
2047-Sep-17 20:37 0.398253 AU
59577743 km
8.82 km/s
2051-Aug-23 13:41 0.470437 AU
70376411 km
8.69 km/s
2059-Jun-17 08:10 0.464371 AU
69468864 km
5.71 km/s
2063-Mar-21 08:06 0.267514 AU
40019528 km
7.95 km/s
2066-Nov-06 12:26 0.249389 AU
37308045 km
7.06 km/s
2067-Mar-22 05:19 0.079535 AU
11898292 km
8.90 km/s
2070-Oct-05 02:24 0.335571 AU
50200750 km
8.42 km/s
2071-Apr-05 11:26 0.411556 AU
61567953 km
16.77 km/s
2074-Sep-08 06:05 0.430625 AU
64420527 km
8.88 km/s
2078-Aug-11 21:05 0.489982 AU
73300303 km
8.39 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
22.2

Orbit Quality

RMS
0.57216
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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