SpaceAtlas Space Object Data
NASA JPL SBDB · 152561

152561

152561 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.454 AU it takes 1.75 yr to circle the Sun.

Apollo Observations: 117
Orbital Period · P
1.75 yr
v(q)
42 km/s
v(Q)
14.5 km/s
Diameter · ≈
0.54 km
TJ
4.45
Eccentricity · e
0.4856

Orbit and dynamics

Between its closest point (0.748 AU) and its farthest (2.16 AU), the heliocentric distance changes by 1.412 AU over every revolution.

One full revolution takes 1.75 yr (640 days), computed from the semi-major axis of 1.454 AU.

The high eccentricity (0.486) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 19.57° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 42 km/s at perihelion and falls to 14.5 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 = 19.1 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.54 km.

Observation record and orbit quality

Astrometry from 117 individual observations underpins this orbit; the fit leaves an RMS residual of 0.5597 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
1.454 AU
Eccentricity
0.4856
Perihelion
0.748 AU
Aphelion
2.160062 AU
Inclination
19.57°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
256.92°

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-Jan-02 05:28 0.362505 AU
54230009 km
9.88 km/s
2027-Feb-24 07:18 0.334171 AU
49991265 km
11.31 km/s
2034-Feb-21 14:43 0.255677 AU
38248694 km
12.30 km/s
2041-Feb-21 23:40 0.194285 AU
29064557 km
14.02 km/s
2048-Feb-25 02:19 0.168437 AU
25197797 km
16.26 km/s
2055-Feb-28 04:59 0.197890 AU
29603882 km
18.82 km/s
2062-Mar-04 01:32 0.272831 AU
40814983 km
21.73 km/s
2063-Aug-24 12:01 0.438391 AU
65582359 km
27.78 km/s
2069-Mar-08 03:32 0.363950 AU
54446116 km
24.70 km/s
2070-Aug-29 14:52 0.335638 AU
50210796 km
24.99 km/s
2076-Mar-12 07:43 0.458976 AU
68661787 km
27.66 km/s
2077-Sep-03 22:22 0.232891 AU
34840067 km
22.25 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
19.1

Orbit Quality

RMS
0.5597
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.