SpaceAtlas Space Object Data
NASA JPL SBDB · 2015 TF145

2015 TF145

2015 TF145 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.421 AU once every 1.69 yr.

Amor Observations: 43
Orbital Period · P
1.69 yr
v(q)
30.4 km/s
v(Q)
20.6 km/s
Diameter · ≈
0.13 km
TJ
4.65
Eccentricity · e
0.1924

Orbit and dynamics

The path is an ellipse reaching 1.147 AU from the Sun at perihelion and 1.694 AU at aphelion, a radial span of 0.547 AU.

Applying Kepler's third law to a = 1.421 AU gives an orbital period of 1.69 yr, or about 619 days.

An eccentricity of 0.192 makes the orbit moderately elongated.

The orbital plane is tilted 15.79° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 30.4 km/s at perihelion and falls to 20.6 km/s at aphelion.

Its perihelion lies just outside Earth's orbit, which is why it is classed as Earth-approaching rather than Earth-crossing.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 22.22 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.13 km.

Observation record and orbit quality

The current orbit solution is based on 43 observations and has a weighted RMS residual of 0.6595 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
1.421 AU
Eccentricity
0.1924
Perihelion
1.147 AU
Aphelion
1.6944 AU
Inclination
15.79°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
51.5°

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-Mar-17 12:17 0.394509 AU
59017725 km
8.62 km/s
2032-Nov-15 07:53 0.296304 AU
44326428 km
8.52 km/s
2037-Oct-13 05:21 0.340294 AU
50907199 km
8.39 km/s
2050-Mar-11 20:54 0.372363 AU
55704693 km
8.26 km/s
2054-Nov-09 15:44 0.265620 AU
39736175 km
8.34 km/s
2059-Oct-07 12:50 0.381720 AU
57104425 km
8.47 km/s
2067-Apr-07 09:50 0.491123 AU
73470969 km
9.49 km/s
2072-Mar-04 20:37 0.355561 AU
53191180 km
7.85 km/s
2076-Nov-03 16:15 0.253627 AU
37941992 km
8.22 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
22.22

Orbit Quality

RMS
0.65948
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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