SpaceAtlas Space Object Data
NASA JPL SBDB · 2010 JT39

2010 JT39

2010 JT39 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.202 AU it takes 1.32 yr to circle the Sun.

Apollo Observations: 26
Orbital Period · P
1.32 yr
v(q)
33.6 km/s
v(Q)
22 km/s
Diameter · ≈
0.06 km
TJ
5.27
Eccentricity · e
0.208

Orbit and dynamics

Between its closest point (0.952 AU) and its farthest (1.452 AU), the heliocentric distance changes by 0.5 AU over every revolution.

One full revolution takes 1.32 yr (481 days), computed from the semi-major axis of 1.202 AU.

An eccentricity of 0.208 makes the orbit moderately elongated.

The orbital plane is tilted 5.05° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 33.6 km/s at perihelion and falls to 22 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 = 23.76 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.06 km.

Observation record and orbit quality

Astrometry from 26 individual observations underpins this orbit; the fit leaves an RMS residual of 0.5959 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
1.202 AU
Eccentricity
0.208
Perihelion
0.952 AU
Aphelion
1.452016 AU
Inclination
5.05°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
2.0°

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
2027-Feb-19 02:34 0.471054 AU
70468747 km
8.11 km/s
2031-Mar-14 10:16 0.427283 AU
63920619 km
7.44 km/s
2031-Oct-28 09:03 0.439458 AU
65741959 km
18.37 km/s
2035-Apr-11 19:19 0.334460 AU
50034520 km
5.88 km/s
2035-Oct-15 05:48 0.159270 AU
23826381 km
10.14 km/s
2039-Aug-21 01:54 0.101998 AU
15258694 km
4.19 km/s
2043-Jun-03 14:43 0.148164 AU
22164984 km
9.38 km/s
2043-Dec-04 10:15 0.330628 AU
49461278 km
5.68 km/s
2047-May-21 01:01 0.422121 AU
63148423 km
17.55 km/s
2048-Jan-03 12:36 0.428037 AU
64033458 km
7.39 km/s
2052-Jan-27 11:29 0.471612 AU
70552148 km
8.13 km/s
2056-Feb-18 19:04 0.471314 AU
70507558 km
8.14 km/s
2060-Mar-13 10:35 0.427889 AU
64011348 km
7.45 km/s
2060-Oct-27 20:38 0.442938 AU
66262624 km
18.47 km/s
2064-Apr-11 10:59 0.333627 AU
49909865 km
5.87 km/s
2064-Oct-14 12:40 0.157468 AU
23556947 km
10.09 km/s
2068-Aug-16 00:07 0.103494 AU
15482523 km
4.23 km/s
2072-Jun-02 08:42 0.158434 AU
23701332 km
9.69 km/s
2072-Dec-05 08:25 0.335837 AU
50240442 km
5.77 km/s
2076-May-19 17:14 0.435862 AU
65203991 km
17.94 km/s
2077-Jan-04 05:27 0.431269 AU
64516993 km
7.44 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
23.76

Orbit Quality

RMS
0.59593
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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