SpaceAtlas Space Object Data
NASA JPL SBDB · 2025 AS1

2025 AS1

2025 AS1 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.133 AU it takes 1.21 yr to circle the Sun.

Apollo Observations: 31
Orbital Period · P
1.21 yr
v(q)
35.3 km/s
v(Q)
22.2 km/s
Diameter · ≈
0.15 km
TJ
5.49
Eccentricity · e
0.2282

Orbit and dynamics

Between its closest point (0.874 AU) and its farthest (1.392 AU), the heliocentric distance changes by 0.518 AU over every revolution.

One full revolution takes 1.21 yr (440 days), computed from the semi-major axis of 1.133 AU.

An eccentricity of 0.228 makes the orbit moderately elongated.

The orbital plane is tilted 9.65° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 35.3 km/s at perihelion and falls to 22.2 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 = 21.94 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.15 km.

Observation record and orbit quality

Astrometry from 31 individual observations underpins this orbit; the fit leaves an RMS residual of 0.6222 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
1.133 AU
Eccentricity
0.2282
Perihelion
0.874 AU
Aphelion
1.391551 AU
Inclination
9.65°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
266.0°

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
2036-Mar-22 11:49 0.197690 AU
29574075 km
10.28 km/s
2042-Apr-03 11:17 0.171894 AU
25715012 km
5.50 km/s
2048-Jun-07 14:43 0.170162 AU
25455939 km
7.60 km/s
2054-Jul-13 04:05 0.129819 AU
19420648 km
7.70 km/s
2060-Aug-12 05:12 0.096159 AU
14385180 km
8.09 km/s
2066-Sep-01 05:31 0.175029 AU
26183998 km
11.37 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
21.94

Orbit Quality

RMS
0.62224
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

Explore asteroids, comets and near-Earth objects with JPL orbital data.