SpaceAtlas Space Object Data
NASA JPL SBDB · 2019 SE9

2019 SE9

2019 SE9 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.258 AU it takes 1.41 yr to circle the Sun.

Apollo Observations: 112
Orbital Period · P
1.41 yr
v(q)
32.3 km/s
v(Q)
21.8 km/s
Diameter · ≈
0.03 km
TJ
5.1
Eccentricity · e
0.1928

Orbit and dynamics

Between its closest point (1.016 AU) and its farthest (1.501 AU), the heliocentric distance changes by 0.485 AU over every revolution.

One full revolution takes 1.41 yr (515 days), computed from the semi-major axis of 1.258 AU.

An eccentricity of 0.193 makes the orbit moderately elongated.

Its inclination of 3.31° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 32.3 km/s at perihelion and falls to 21.8 km/s at aphelion.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 25.16 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.03 km.

Observation record and orbit quality

Astrometry from 112 individual observations underpins this orbit; the fit leaves an RMS residual of 0.4551 arcseconds.

Condition code U = 5 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
1.258 AU
Eccentricity
0.1928
Perihelion
1.016 AU
Aphelion
1.500542 AU
Inclination
3.31°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
278.44°

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-Jan-20 23:37 0.442018 AU
66124959 km
7.06 km/s
2033-Apr-09 21:44 0.461499 AU
69039307 km
7.41 km/s
2036-Jul-16 14:28 0.280556 AU
41970563 km
11.30 km/s
2036-Dec-12 13:44 0.307511 AU
46002972 km
4.35 km/s
2043-Oct-01 07:26 0.029841 AU
4464178 km
3.95 km/s
2047-Feb-13 10:44 0.498594 AU
74588630 km
8.04 km/s
2050-Apr-29 08:03 0.406941 AU
60877476 km
6.45 km/s
2053-Jul-09 01:28 0.415373 AU
62138850 km
15.66 km/s
2053-Dec-31 09:57 0.370909 AU
55487195 km
5.77 km/s
2060-Oct-03 13:54 0.027728 AU
4148078 km
4.37 km/s
2064-Feb-07 22:19 0.491234 AU
73487632 km
7.91 km/s
2067-Apr-16 13:03 0.454386 AU
67975233 km
7.29 km/s
2070-Jul-23 10:37 0.186852 AU
27952686 km
9.11 km/s
2070-Nov-30 00:10 0.252310 AU
37744969 km
3.26 km/s
2077-May-15 13:47 0.334174 AU
49991664 km
5.39 km/s
2077-Oct-29 05:28 0.331207 AU
49547794 km
14.88 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
25.16

Orbit Quality

RMS
0.45513
Condition
5
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.