SpaceAtlas Space Object Data
NASA JPL SBDB · 2004 QZ1

2004 QZ1

2004 QZ1 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.865 AU it takes 2.55 yr to circle the Sun.

Apollo Observations: 124
Orbital Period · P
2.55 yr
v(q)
53 km/s
v(Q)
9 km/s
Diameter · ≈
0.26 km
TJ
3.63
Eccentricity · e
0.7108

Orbit and dynamics

Between its closest point (0.54 AU) and its farthest (3.191 AU), the heliocentric distance changes by 2.651 AU over every revolution.

One full revolution takes 2.55 yr (930 days), computed from the semi-major axis of 1.865 AU.

The high eccentricity (0.711) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 5.51° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 53 km/s at perihelion and falls to 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 = 20.7 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.26 km.

Observation record and orbit quality

Astrometry from 124 individual observations underpins this orbit; the fit leaves an RMS residual of 0.5513 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
1.865 AU
Eccentricity
0.7108
Perihelion
0.54 AU
Aphelion
3.190642 AU
Inclination
5.51°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
171.79°

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
2027-Aug-24 12:18 0.357141 AU
53427597 km
31.70 km/s
2032-Oct-03 08:52 0.270550 AU
40473727 km
14.50 km/s
2037-Dec-18 17:23 0.444154 AU
66444438 km
23.07 km/s
2043-Mar-07 08:16 0.220880 AU
33043182 km
15.54 km/s
2048-Apr-10 10:28 0.418367 AU
62586834 km
33.72 km/s
2055-Sep-04 11:23 0.163689 AU
24487517 km
25.39 km/s
2060-Nov-04 12:09 0.384477 AU
57516915 km
18.32 km/s
2066-Jan-07 04:58 0.426858 AU
63857109 km
21.58 km/s
2071-Mar-22 10:35 0.093515 AU
13989638 km
21.76 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
20.7

Orbit Quality

RMS
0.55126
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.

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