SpaceAtlas Space Object Data
NASA JPL SBDB · 1998 BY7

1998 BY7

1998 BY7 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 2.02 AU it takes 2.87 yr to circle the Sun.

Apollo Observations: 163
Orbital Period · P
2.87 yr
v(q)
42.5 km/s
v(Q)
10.3 km/s
Diameter · ≈
0.18 km
TJ
3.56
Eccentricity · e
0.6086

Orbit and dynamics

Between its closest point (0.791 AU) and its farthest (3.249 AU), the heliocentric distance changes by 2.458 AU over every revolution.

One full revolution takes 2.87 yr (1,049 days), computed from the semi-major axis of 2.02 AU.

The high eccentricity (0.609) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

Its inclination of 3.28° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 42.5 km/s at perihelion and falls to 10.3 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 = 21.47 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.18 km.

Observation record and orbit quality

Astrometry from 163 individual observations underpins this orbit; the fit leaves an RMS residual of 0.5024 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
2.02 AU
Eccentricity
0.6086
Perihelion
0.791 AU
Aphelion
3.249372 AU
Inclination
3.28°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
286.71°

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
2041-Jun-29 14:15 0.025941 AU
3880698 km
14.88 km/s
2044-Feb-15 18:58 0.055573 AU
8313562 km
16.65 km/s
2061-Jul-22 08:05 0.362057 AU
54162890 km
25.59 km/s
2064-Apr-14 13:52 0.212467 AU
31784615 km
12.59 km/s
2067-Jan-23 07:42 0.490386 AU
73360700 km
29.74 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
21.47

Orbit Quality

RMS
0.50241
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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