SpaceAtlas Space Object Data
NASA JPL SBDB · 2001 SH276

2001 SH276

2001 SH276 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.028 AU it takes 1.04 yr to circle the Sun.

Apollo Observations: 645
Orbital Period · P
1.04 yr
v(q)
35.3 km/s
v(Q)
24.5 km/s
Diameter · ≈
0.41 km
TJ
5.88
Eccentricity · e
0.1807

Orbit and dynamics

The path is an ellipse reaching 0.842 AU from the Sun at perihelion and 1.214 AU at aphelion, a radial span of 0.372 AU.

Applying Kepler's third law to a = 1.028 AU gives an orbital period of 1.04 yr, or about 381 days.

An eccentricity of 0.181 makes the orbit moderately elongated.

A steep inclination of 20.4° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 35.3 km/s at perihelion and falls to 24.5 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 = 19.69 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.41 km.

Observation record and orbit quality

The current orbit solution is based on 645 observations and has a weighted RMS residual of 0.374 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
1.028 AU
Eccentricity
0.1807
Perihelion
0.842 AU
Aphelion
1.21376 AU
Inclination
20.4°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
357.01°

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-Sep-29 22:11 0.166752 AU
24945760 km
13.68 km/s
2048-Mar-14 14:03 0.199695 AU
29873979 km
15.19 km/s
2049-Apr-06 04:30 0.116678 AU
17454764 km
11.86 km/s
2051-Oct-01 02:39 0.099237 AU
14845663 km
11.73 km/s
2073-Mar-26 08:20 0.098702 AU
14765559 km
12.84 km/s
2075-Oct-04 19:58 0.130898 AU
19582058 km
10.82 km/s
2076-Sep-29 08:43 0.177941 AU
26619643 km
13.96 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
19.69

Orbit Quality

RMS
0.37397
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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