SpaceAtlas Space Object Data
NASA JPL SBDB · 2017 SL19

2017 SL19

2017 SL19 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.434 AU once every 1.72 yr.

Amor Observations: 58
Orbital Period · P
1.72 yr
v(q)
30.3 km/s
v(Q)
20.4 km/s
Diameter · ≈
0.11 km
TJ
4.66
Eccentricity · e
0.1957

Orbit and dynamics

The path is an ellipse reaching 1.153 AU from the Sun at perihelion and 1.715 AU at aphelion, a radial span of 0.562 AU.

Applying Kepler's third law to a = 1.434 AU gives an orbital period of 1.72 yr, or about 627 days.

An eccentricity of 0.196 makes the orbit moderately elongated.

Its inclination of 2.81° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 30.3 km/s at perihelion and falls to 20.4 km/s at aphelion.

Its perihelion lies just outside Earth's orbit, which is why it is classed as Earth-approaching rather than Earth-crossing.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 22.6 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.11 km.

Observation record and orbit quality

The current orbit solution is based on 58 observations and has a weighted RMS residual of 0.8333 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
1.434 AU
Eccentricity
0.1957
Perihelion
1.153 AU
Aphelion
1.714634 AU
Inclination
2.81°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
98.65°

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
2029-Sep-02 14:53 0.355911 AU
53243558 km
3.41 km/s
2034-Apr-04 20:59 0.381198 AU
57026385 km
3.95 km/s
2041-Aug-19 02:19 0.299493 AU
44803494 km
2.31 km/s
2046-Mar-25 09:35 0.426713 AU
63835288 km
4.93 km/s
2053-Aug-02 06:48 0.241974 AU
36198760 km
1.47 km/s
2058-Mar-17 09:33 0.462942 AU
69255176 km
5.66 km/s
2065-Jul-18 06:07 0.194154 AU
29044998 km
1.36 km/s
2070-Mar-11 15:11 0.489390 AU
73211714 km
6.18 km/s
2077-Jul-08 13:18 0.164049 AU
24541453 km
1.42 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
22.6

Orbit Quality

RMS
0.83331
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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