SpaceAtlas Space Object Data
NASA JPL SBDB · 2003 BR47

2003 BR47

2003 BR47 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.628 AU it takes 2.08 yr to circle the Sun.

Apollo Observations: 180
Orbital Period · P
2.08 yr
v(q)
40.4 km/s
v(Q)
13.5 km/s
Diameter · ≈
0.18 km
TJ
4.16
Eccentricity · e
0.5002

Orbit and dynamics

The path is an ellipse reaching 0.814 AU from the Sun at perihelion and 2.442 AU at aphelion, a radial span of 1.628 AU.

Applying Kepler's third law to a = 1.628 AU gives an orbital period of 2.08 yr, or about 759 days.

The high eccentricity (0.5) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

Its inclination of 4.42° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 40.4 km/s at perihelion and falls to 13.5 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 = 21.53 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.18 km.

Observation record and orbit quality

The current orbit solution is based on 180 observations and has a weighted RMS residual of 0.5982 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
1.628 AU
Eccentricity
0.5002
Perihelion
0.814 AU
Aphelion
2.442326 AU
Inclination
4.42°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
106.58°

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-Nov-12 18:10 0.178463 AU
26697697 km
10.02 km/s
2030-Feb-05 13:24 0.095677 AU
14313014 km
15.18 km/s
2052-Sep-19 10:21 0.089860 AU
13442890 km
14.27 km/s
2054-Dec-21 00:29 0.164520 AU
24611868 km
9.89 km/s
2079-Sep-22 00:50 0.075974 AU
11365616 km
13.65 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
21.53

Orbit Quality

RMS
0.59819
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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