SpaceAtlas Space Object Data
NASA JPL SBDB · 2017 JL2

2017 JL2

2017 JL2 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.132 AU it takes 1.20 yr to circle the Sun.

Apollo Observations: 105
Orbital Period · P
1.20 yr
v(q)
42.5 km/s
v(Q)
18.4 km/s
Diameter · ≈
0.17 km
TJ
5.39
Eccentricity · e
0.3954

Orbit and dynamics

The path is an ellipse reaching 0.685 AU from the Sun at perihelion and 1.58 AU at aphelion, a radial span of 0.895 AU.

Applying Kepler's third law to a = 1.132 AU gives an orbital period of 1.20 yr, or about 440 days.

An eccentricity of 0.395 makes the orbit moderately elongated.

A steep inclination of 21.87° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 42.5 km/s at perihelion and falls to 18.4 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 = 21.63 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.17 km.

Observation record and orbit quality

The current orbit solution is based on 105 observations and has a weighted RMS residual of 0.5091 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
1.132 AU
Eccentricity
0.3954
Perihelion
0.685 AU
Aphelion
1.579593 AU
Inclination
21.87°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
280.64°

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-Oct-08 11:07 0.158591 AU
23724802 km
18.47 km/s
2029-Apr-18 19:46 0.087091 AU
13028670 km
16.97 km/s
2033-Oct-19 14:25 0.126854 AU
18977029 km
15.59 km/s
2035-Apr-24 17:15 0.222416 AU
33272965 km
20.78 km/s
2039-Nov-05 22:29 0.225260 AU
33698383 km
14.06 km/s
2041-Apr-30 12:49 0.375371 AU
56154657 km
24.99 km/s
2045-Dec-01 08:40 0.341668 AU
51112779 km
14.22 km/s
2051-Dec-30 20:54 0.413502 AU
61859024 km
13.74 km/s
2052-May-08 13:55 0.483447 AU
72322675 km
11.96 km/s
2058-Feb-06 00:56 0.417789 AU
62500310 km
10.42 km/s
2058-Apr-25 18:17 0.365091 AU
54616773 km
11.74 km/s
2062-Sep-21 20:26 0.391872 AU
58623277 km
25.17 km/s
2064-Apr-16 04:29 0.222982 AU
33357627 km
12.28 km/s
2068-Sep-30 08:34 0.250750 AU
37511657 km
21.22 km/s
2070-Apr-16 08:38 0.090412 AU
13525445 km
14.48 km/s
2074-Oct-10 07:49 0.140805 AU
21064162 km
17.88 km/s
2076-Apr-19 16:09 0.107446 AU
16073720 km
17.64 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
21.63

Orbit Quality

RMS
0.50906
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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