SpaceAtlas Space Object Data
NASA JPL SBDB · 2017 QD3

2017 QD3

2017 QD3 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.155 AU it takes 1.24 yr to circle the Sun.

Apollo Observations: 42
Orbital Period · P
1.24 yr
v(q)
35 km/s
v(Q)
21.9 km/s
Diameter · ≈
0.12 km
TJ
5.4
Eccentricity · e
0.2306

Orbit and dynamics

Between its closest point (0.889 AU) and its farthest (1.421 AU), the heliocentric distance changes by 0.532 AU over every revolution.

One full revolution takes 1.24 yr (453 days), computed from the semi-major axis of 1.155 AU.

An eccentricity of 0.231 makes the orbit moderately elongated.

The orbital plane is tilted 12.75° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 35 km/s at perihelion and falls to 21.9 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 = 22.28 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.12 km.

Observation record and orbit quality

Astrometry from 42 individual observations underpins this orbit; the fit leaves an RMS residual of 0.4407 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
1.155 AU
Eccentricity
0.2306
Perihelion
0.889 AU
Aphelion
1.421343 AU
Inclination
12.75°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
336.44°

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
2044-Jan-14 04:12 0.133645 AU
19993014 km
12.04 km/s
2048-Dec-31 07:47 0.061306 AU
9171308 km
8.02 km/s
2053-Jul-30 00:39 0.163788 AU
24502299 km
7.52 km/s
2058-Aug-05 05:35 0.185674 AU
27776435 km
11.19 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
22.28

Orbit Quality

RMS
0.44074
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

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