SpaceAtlas Space Object Data
NASA JPL SBDB · 2018 DB1

2018 DB1

2018 DB1 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.069 AU it takes 1.11 yr to circle the Sun.

Apollo Observations: 44
Orbital Period · P
1.11 yr
v(q)
30.3 km/s
v(Q)
27.3 km/s
Diameter · ≈
0.02 km
TJ
5.76
Eccentricity · e
0.0521

Orbit and dynamics

Between its closest point (1.014 AU) and its farthest (1.125 AU), the heliocentric distance changes by 0.111 AU over every revolution.

One full revolution takes 1.11 yr (404 days), computed from the semi-major axis of 1.069 AU.

With e = 0.052, the orbit is close to circular.

The orbital plane is tilted 10.87° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 30.3 km/s at perihelion and falls to 27.3 km/s at aphelion.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 26 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.02 km.

Observation record and orbit quality

Astrometry from 44 individual observations underpins this orbit; the fit leaves an RMS residual of 0.4176 arcseconds.

Condition code U = 6 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
1.069 AU
Eccentricity
0.0521
Perihelion
1.014 AU
Aphelion
1.124695 AU
Inclination
10.87°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
169.82°

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
2028-Feb-23 15:52 0.260809 AU
39016411 km
10.65 km/s
2028-Sep-01 20:24 0.118164 AU
17677041 km
5.79 km/s
2039-Feb-25 21:58 0.029352 AU
4390984 km
5.82 km/s
2049-Feb-23 17:49 0.150823 AU
22562751 km
7.81 km/s
2049-Aug-15 01:42 0.123534 AU
18480399 km
5.85 km/s
2059-Feb-22 04:28 0.367764 AU
55016775 km
13.49 km/s
2059-Sep-19 07:10 0.143048 AU
21399663 km
5.76 km/s
2060-Feb-24 18:47 0.220852 AU
33038962 km
8.93 km/s
2070-Feb-25 11:54 0.012550 AU
1877386 km
5.74 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
26.0

Orbit Quality

RMS
0.41764
Condition
6
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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