SpaceAtlas Space Object Data
NASA JPL SBDB · 2012 BO77

2012 BO77

2012 BO77 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.944 AU and a period of 0.92 yr.

Aten Observations: 89
Orbital Period · P
0.92 yr
v(q)
57.8 km/s
v(Q)
16.3 km/s
Diameter · ≈
0.12 km
TJ
6.2
Eccentricity · e
0.5611

Orbit and dynamics

Between its closest point (0.414 AU) and its farthest (1.474 AU), the heliocentric distance changes by 1.06 AU over every revolution.

One full revolution takes 0.92 yr (335 days), computed from the semi-major axis of 0.944 AU.

The high eccentricity (0.561) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 12.37° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 57.8 km/s at perihelion and falls to 16.3 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 = 22.3 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.12 km.

Observation record and orbit quality

Astrometry from 89 individual observations underpins this orbit; the fit leaves an RMS residual of 0.4027 arcseconds.

Condition code U = 1 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
0.9442 AU
Eccentricity
0.5611
Perihelion
0.414 AU
Aphelion
1.473991 AU
Inclination
12.37°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
145.36°

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

No close approaches to Earth are currently on record for this object.

Physical Parameters

Diameter
— km
Albedo
—
Density
— g/cm³
Rotation Period
— h
Absolute Magnitude
22.3

Orbit Quality

RMS
0.40267
Condition
1
Orbit ID
—
Data source: NASA JPL Small-Body Database . 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.

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