SpaceAtlas Space Object Data
NASA JPL SBDB · 2019 DA1

2019 DA1

2019 DA1 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.403 AU it takes 1.66 yr to circle the Sun.

Apollo Observations: 53
Orbital Period · P
1.66 yr
v(q)
39.9 km/s
v(Q)
15.9 km/s
Diameter · ≈
0.02 km
TJ
4.64
Eccentricity · e
0.4309

Orbit and dynamics

The path is an ellipse reaching 0.799 AU from the Sun at perihelion and 2.008 AU at aphelion, a radial span of 1.209 AU.

Applying Kepler's third law to a = 1.403 AU gives an orbital period of 1.66 yr, or about 607 days.

The high eccentricity (0.431) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 5.74° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 39.9 km/s at perihelion and falls to 15.9 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 = 25.96 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.02 km.

Observation record and orbit quality

The current orbit solution is based on 53 observations and has a weighted RMS residual of 0.3717 arcseconds.

Condition code U = 7 signals a poorly constrained orbit, so its future path should be treated as provisional.

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
1.403 AU
Eccentricity
0.4309
Perihelion
0.799 AU
Aphelion
2.007553 AU
Inclination
5.74°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
101.04°

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-Feb-26 21:21 0.066058 AU
9882089 km
15.88 km/s
2034-Feb-21 21:41 0.206215 AU
30849382 km
18.84 km/s
2039-Feb-16 18:59 0.243831 AU
36476572 km
22.12 km/s
2044-Feb-11 11:15 0.296446 AU
44347667 km
25.63 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
25.96

Orbit Quality

RMS
0.37172
Condition
7
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

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