SpaceAtlas Space Object Data
NASA JPL SBDB · 2017 JA2

2017 JA2

2017 JA2 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.201 AU it takes 1.32 yr to circle the Sun.

Apollo Observations: 188
Orbital Period · P
1.32 yr
v(q)
36.6 km/s
v(Q)
20.2 km/s
Diameter · ≈
0.04 km
TJ
5.24
Eccentricity · e
0.2899

Orbit and dynamics

Between its closest point (0.853 AU) and its farthest (1.549 AU), the heliocentric distance changes by 0.696 AU over every revolution.

One full revolution takes 1.32 yr (481 days), computed from the semi-major axis of 1.201 AU.

An eccentricity of 0.29 makes the orbit moderately elongated.

The orbital plane is tilted 9.53° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 36.6 km/s at perihelion and falls to 20.2 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 = 24.7 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.04 km.

Observation record and orbit quality

Astrometry from 188 individual observations underpins this orbit; the fit leaves an RMS residual of 0.4691 arcseconds.

Condition code U = 6 indicates a moderately constrained orbit; predictions decades ahead still carry noticeable uncertainty.

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
1.201 AU
Eccentricity
0.2899
Perihelion
0.853 AU
Aphelion
1.54917 AU
Inclination
9.53°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
277.86°

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-Nov-01 23:35 0.417665 AU
62481773 km
22.38 km/s
2034-Oct-20 08:48 0.124627 AU
18643910 km
13.45 km/s
2038-Mar-29 10:50 0.376075 AU
56260010 km
6.96 km/s
2038-Oct-15 06:33 0.150901 AU
22574449 km
6.01 km/s
2042-Nov-25 08:01 0.363431 AU
54368568 km
8.17 km/s
2046-May-02 13:48 0.085694 AU
12819668 km
14.09 km/s
2050-Apr-17 21:30 0.397588 AU
59478360 km
22.77 km/s
2059-Oct-26 00:41 0.237443 AU
35520921 km
17.18 km/s
2063-Mar-15 11:19 0.456077 AU
68228196 km
7.96 km/s
2063-Oct-14 08:04 0.092427 AU
13826841 km
8.63 km/s
2067-Nov-11 21:38 0.299694 AU
44833538 km
7.21 km/s
2071-May-10 04:32 0.001374 AU
205590 km
10.67 km/s
2071-Dec-11 03:53 0.463789 AU
69381850 km
9.09 km/s
2075-Apr-22 08:00 0.366513 AU
54829562 km
20.26 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
24.7

Orbit Quality

RMS
0.46906
Condition
6
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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