SpaceAtlas Space Object Data
NASA JPL SBDB · 2017 SF19

2017 SF19

2017 SF19 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 2.284 AU it takes 3.45 yr to circle the Sun.

Apollo Observations: 38
Orbital Period · P
3.45 yr
v(q)
44.4 km/s
v(Q)
8.7 km/s
Diameter · ≈
0.29 km
TJ
3.02
Eccentricity · e
0.6709

Orbit and dynamics

The path is an ellipse reaching 0.752 AU from the Sun at perihelion and 3.816 AU at aphelion, a radial span of 3.064 AU.

Applying Kepler's third law to a = 2.284 AU gives an orbital period of 3.45 yr, or about 1,261 days.

The high eccentricity (0.671) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

A steep inclination of 41.1° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 44.4 km/s at perihelion and falls to 8.7 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 = 20.45 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.29 km.

Observation record and orbit quality

The current orbit solution is based on 38 observations and has a weighted RMS residual of 0.4093 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
2.284 AU
Eccentricity
0.6709
Perihelion
0.752 AU
Aphelion
3.816336 AU
Inclination
41.1°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
217.12°

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-Feb-22 16:10 0.358550 AU
53638373 km
35.42 km/s
2048-Sep-03 00:47 0.381480 AU
57068656 km
32.97 km/s
2055-Aug-17 23:59 0.385270 AU
57635645 km
22.11 km/s
2062-Mar-14 01:42 0.179317 AU
26825456 km
25.06 km/s
2069-Feb-20 06:46 0.397402 AU
59450451 km
36.31 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
20.45

Orbit Quality

RMS
0.40925
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.

Keep exploring

Explore asteroids, comets and near-Earth objects with JPL orbital data.