SpaceAtlas Space Object Data
NASA JPL SBDB · 2007 TH1

2007 TH1

2007 TH1 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.362 AU it takes 1.59 yr to circle the Sun.

Apollo Observations: 90
Orbital Period · P
1.59 yr
v(q)
39.8 km/s
v(Q)
16.4 km/s
Diameter · ≈
0.15 km
TJ
4.69
Eccentricity · e
0.4179

Orbit and dynamics

Between its closest point (0.793 AU) and its farthest (1.931 AU), the heliocentric distance changes by 1.138 AU over every revolution.

One full revolution takes 1.59 yr (581 days), computed from the semi-major axis of 1.362 AU.

The high eccentricity (0.418) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

A steep inclination of 20.11° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 39.8 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 = 21.88 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.15 km.

Observation record and orbit quality

Astrometry from 90 individual observations underpins this orbit; the fit leaves an RMS residual of 0.4446 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
1.362 AU
Eccentricity
0.4179
Perihelion
0.793 AU
Aphelion
1.93118 AU
Inclination
20.11°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
307.49°

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
2031-Apr-12 10:09 0.289919 AU
43371322 km
21.99 km/s
2034-Oct-05 15:18 0.026225 AU
3923211 km
16.31 km/s
2042-Sep-14 10:59 0.271291 AU
40584565 km
11.33 km/s
2050-Apr-21 14:19 0.307062 AU
45935786 km
11.28 km/s
2058-Apr-20 22:04 0.136524 AU
20423641 km
15.77 km/s
2061-Oct-18 08:52 0.291032 AU
43537826 km
23.14 km/s
2066-Apr-11 03:04 0.323226 AU
48353944 km
22.92 km/s
2069-Oct-04 19:16 0.019606 AU
2932985 km
16.01 km/s
2077-Sep-15 04:23 0.264294 AU
39537777 km
11.41 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
21.88

Orbit Quality

RMS
0.44458
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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