SpaceAtlas Space Object Data
NASA JPL SBDB · 2017 BG85

2017 BG85

2017 BG85 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 2.371 AU once every 3.65 yr.

Amor Observations: 154
Orbital Period · P
3.65 yr
v(q)
31.9 km/s
v(Q)
11.7 km/s
Diameter · ≈
0.55 km
TJ
3.38
Eccentricity · e
0.462

Orbit and dynamics

Between its closest point (1.276 AU) and its farthest (3.466 AU), the heliocentric distance changes by 2.19 AU over every revolution.

One full revolution takes 3.65 yr (1,333 days), computed from the semi-major axis of 2.371 AU.

The high eccentricity (0.462) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 7.89° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 31.9 km/s at perihelion and falls to 11.7 km/s at aphelion.

Its perihelion lies just outside Earth's orbit, which is why it is classed as Earth-approaching rather than Earth-crossing.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 19.05 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.55 km.

Observation record and orbit quality

Astrometry from 154 individual observations underpins this orbit; the fit leaves an RMS residual of 0.4993 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
2.371 AU
Eccentricity
0.462
Perihelion
1.276 AU
Aphelion
3.466402 AU
Inclination
7.89°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
164.68°

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
2039-Apr-12 00:32 0.390946 AU
58484733 km
4.36 km/s
2050-Apr-23 04:56 0.294899 AU
44116321 km
4.31 km/s
2061-Apr-22 01:53 0.309314 AU
46272642 km
4.20 km/s
2072-Apr-20 18:46 0.307964 AU
46070728 km
4.30 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
19.05

Orbit Quality

RMS
0.49933
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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