SpaceAtlas Space Object Data
NASA JPL SBDB · 2018 DZ1

2018 DZ1

2018 DZ1 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.978 AU and a period of 0.97 yr.

Aten Observations: 53
Orbital Period · P
0.97 yr
v(q)
33.2 km/s
v(Q)
27.4 km/s
Diameter · ≈
0.04 km
TJ
6.17
Eccentricity · e
0.0957

Orbit and dynamics

The path is an ellipse reaching 0.884 AU from the Sun at perihelion and 1.072 AU at aphelion, a radial span of 0.188 AU.

Applying Kepler's third law to a = 0.978 AU gives an orbital period of 0.97 yr, or about 353 days.

With e = 0.096, the orbit is close to circular.

The orbital plane is tilted 11.37° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 33.2 km/s at perihelion and falls to 27.4 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 = 24.8 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.04 km.

Observation record and orbit quality

The current orbit solution is based on 53 observations and has a weighted RMS residual of 0.5893 arcseconds.

Condition code U = 2 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
0.978 AU
Eccentricity
0.0957
Perihelion
0.884 AU
Aphelion
1.071595 AU
Inclination
11.37°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
20.54°

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
2045-Jan-03 18:50 0.379825 AU
56820954 km
13.53 km/s
2046-Jan-12 12:30 0.213907 AU
32000006 km
8.37 km/s
2046-Oct-03 12:19 0.167094 AU
24996943 km
6.88 km/s
2047-Feb-08 04:01 0.097016 AU
14513432 km
6.43 km/s
2047-Aug-22 23:57 0.124851 AU
18677431 km
7.17 km/s
2048-Mar-07 08:54 0.114681 AU
17156014 km
6.51 km/s
2048-Jul-11 10:16 0.171722 AU
25689266 km
6.86 km/s
2049-Apr-06 13:22 0.233015 AU
34858575 km
8.31 km/s
2050-Apr-16 04:37 0.391541 AU
58573634 km
13.44 km/s
2075-Jan-04 05:04 0.346890 AU
51893980 km
12.45 km/s
2076-Jan-17 02:43 0.188080 AU
28136325 km
7.76 km/s
2076-Sep-24 13:10 0.154738 AU
23148549 km
7.01 km/s
2077-Feb-12 10:13 0.086978 AU
13011728 km
6.35 km/s
2077-Aug-15 15:00 0.127085 AU
19011703 km
7.16 km/s
2078-Mar-12 19:28 0.131317 AU
19644802 km
6.65 km/s
2078-Jul-02 14:18 0.184644 AU
27622337 km
6.67 km/s
2079-Apr-10 14:43 0.257002 AU
38446913 km
8.99 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
24.8

Orbit Quality

RMS
0.58933
Condition
2
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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