SpaceAtlas Space Object Data
NASA JPL SBDB · 2015 TF

2015 TF

2015 TF belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.1 AU it takes 1.15 yr to circle the Sun.

Apollo Observations: 214
Orbital Period · P
1.15 yr
v(q)
49.1 km/s
v(Q)
16.4 km/s
Diameter · ≈
0.13 km
TJ
5.51
Eccentricity · e
0.499

Orbit and dynamics

The path is an ellipse reaching 0.551 AU from the Sun at perihelion and 1.649 AU at aphelion, a radial span of 1.098 AU.

Applying Kepler's third law to a = 1.1 AU gives an orbital period of 1.15 yr, or about 421 days.

The high eccentricity (0.499) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 10.79° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 49.1 km/s at perihelion and falls to 16.4 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 = 22.14 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 214 observations and has a weighted RMS residual of 0.2991 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
1.1 AU
Eccentricity
0.499
Perihelion
0.551 AU
Aphelion
1.6489 AU
Inclination
10.79°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
17.52°

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
2030-Oct-27 19:09 0.105523 AU
15785948 km
13.40 km/s
2032-Mar-07 19:41 0.428012 AU
64029754 km
18.49 km/s
2033-Jun-16 00:29 0.331080 AU
49528821 km
24.26 km/s
2037-Oct-10 22:27 0.352396 AU
52717674 km
26.28 km/s
2038-Sep-26 17:46 0.491952 AU
73594996 km
11.85 km/s
2039-Jan-19 04:40 0.436725 AU
65333106 km
17.56 km/s
2040-May-20 02:06 0.209275 AU
31307065 km
12.06 km/s
2045-Oct-28 06:25 0.158707 AU
23742244 km
11.98 km/s
2047-Mar-15 01:35 0.416663 AU
62331877 km
17.87 km/s
2048-Jun-18 13:11 0.379927 AU
56836282 km
25.90 km/s
2052-Oct-13 03:43 0.299033 AU
44734758 km
24.63 km/s
2054-Jan-25 08:46 0.443419 AU
66334532 km
18.32 km/s
2055-May-25 22:20 0.178606 AU
26719108 km
13.34 km/s
2060-Oct-27 07:12 0.203077 AU
30379947 km
11.03 km/s
2062-Mar-20 05:34 0.406000 AU
60736767 km
17.24 km/s
2063-Jun-21 12:39 0.419033 AU
62686493 km
27.17 km/s
2067-Oct-15 09:08 0.266454 AU
39860961 km
23.61 km/s
2069-Jan-28 16:13 0.446436 AU
66785857 km
18.66 km/s
2070-May-27 21:48 0.167032 AU
24987645 km
14.09 km/s
2075-Oct-27 13:26 0.218135 AU
32632497 km
10.78 km/s
2077-Mar-21 12:18 0.402790 AU
60256503 km
17.04 km/s
2078-Jun-21 19:06 0.426858 AU
63856995 km
27.43 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
22.14

Orbit Quality

RMS
0.29914
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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