SpaceAtlas Space Object Data
NASA JPL SBDB · 2013 CT36

2013 CT36

2013 CT36 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 2.465 AU it takes 3.87 yr to circle the Sun.

Apollo Observations: 189
Orbital Period · P
3.87 yr
v(q)
59.6 km/s
v(Q)
6 km/s
Diameter · ≈
0.48 km
TJ
2.9
Eccentricity · e
0.8158

Orbit and dynamics

The path is an ellipse reaching 0.454 AU from the Sun at perihelion and 4.476 AU at aphelion, a radial span of 4.022 AU.

Applying Kepler's third law to a = 2.465 AU gives an orbital period of 3.87 yr, or about 1,414 days.

The high eccentricity (0.816) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 6.3° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 59.6 km/s at perihelion and falls to 6 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 = 19.33 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.48 km.

Observation record and orbit quality

The current orbit solution is based on 189 observations and has a weighted RMS residual of 0.387 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
2.465 AU
Eccentricity
0.8158
Perihelion
0.454 AU
Aphelion
4.475947 AU
Inclination
6.3°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
177.12°

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
2044-Feb-15 08:06 0.329340 AU
49268601 km
35.34 km/s
2048-Jan-22 14:28 0.158151 AU
23659087 km
21.17 km/s
2051-Nov-22 02:10 0.481656 AU
72054734 km
24.69 km/s
2059-Sep-28 17:47 0.481590 AU
72044789 km
24.89 km/s
2063-Aug-22 17:00 0.364982 AU
54600496 km
17.57 km/s
2067-Aug-06 06:47 0.260031 AU
38900115 km
17.56 km/s
2071-Jul-29 22:26 0.194760 AU
29135625 km
19.42 km/s
2075-Jul-23 14:47 0.115478 AU
17275265 km
21.95 km/s
2079-Jul-30 08:04 0.167809 AU
25103920 km
19.68 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
19.33

Orbit Quality

RMS
0.38696
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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