SpaceAtlas Space Object Data
NASA JPL SBDB · 2005 AZ28

2005 AZ28

2005 AZ28 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.479 AU it takes 1.80 yr to circle the Sun.

Apollo Observations: 57
Orbital Period · P
1.80 yr
v(q)
35.2 km/s
v(Q)
17 km/s
Diameter · ≈
0.05 km
TJ
4.52
Eccentricity · e
0.3481

Orbit and dynamics

The path is an ellipse reaching 0.964 AU from the Sun at perihelion and 1.994 AU at aphelion, a radial span of 1.03 AU.

Applying Kepler's third law to a = 1.479 AU gives an orbital period of 1.80 yr, or about 657 days.

An eccentricity of 0.348 makes the orbit moderately elongated.

Its inclination of 1.6° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 35.2 km/s at perihelion and falls to 17 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 = 24.33 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.05 km.

Observation record and orbit quality

The current orbit solution is based on 57 observations and has a weighted RMS residual of 0.5707 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
1.479 AU
Eccentricity
0.3481
Perihelion
0.964 AU
Aphelion
1.99384 AU
Inclination
1.6°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
354.14°

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
2031-Oct-13 23:23 0.030287 AU
4530888 km
6.24 km/s
2040-Sep-22 01:40 0.193389 AU
28930603 km
11.85 km/s
2041-Jan-31 02:17 0.399070 AU
59700085 km
3.90 km/s
2049-Sep-09 14:51 0.404602 AU
60527575 km
18.14 km/s
2065-Aug-18 10:24 0.460813 AU
68936625 km
5.00 km/s
2066-Jan-11 06:21 0.286292 AU
42828707 km
14.77 km/s
2074-Dec-27 07:11 0.081389 AU
12175694 km
8.36 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
24.33

Orbit Quality

RMS
0.57073
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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