SpaceAtlas Space Object Data
NASA JPL SBDB · 1998 VS

1998 VS

1998 VS belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.4 AU it takes 1.66 yr to circle the Sun.

Apollo Observations: 68
Orbital Period · P
1.66 yr
v(q)
33.5 km/s
v(Q)
18.9 km/s
Diameter · ≈
0.11 km
TJ
4.71
Eccentricity · e
0.2772

Orbit and dynamics

The path is an ellipse reaching 1.012 AU from the Sun at perihelion and 1.788 AU at aphelion, a radial span of 0.776 AU.

Applying Kepler's third law to a = 1.4 AU gives an orbital period of 1.66 yr, or about 605 days.

An eccentricity of 0.277 makes the orbit moderately elongated.

The orbital plane is tilted 6.83° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 33.5 km/s at perihelion and falls to 18.9 km/s at aphelion.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 22.45 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.11 km.

Observation record and orbit quality

The current orbit solution is based on 68 observations and has a weighted RMS residual of 0.4072 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
1.4 AU
Eccentricity
0.2772
Perihelion
1.012 AU
Aphelion
1.78808 AU
Inclination
6.83°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
250.77°

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-Jul-05 06:47 0.429726 AU
64286047 km
5.44 km/s
2041-Nov-28 00:51 0.373273 AU
55840851 km
15.55 km/s
2046-Nov-17 09:16 0.177135 AU
26499066 km
9.93 km/s
2051-Oct-31 18:59 0.040472 AU
6054540 km
5.51 km/s
2056-Sep-14 17:14 0.146624 AU
21934651 km
6.65 km/s
2061-Aug-22 22:25 0.307571 AU
46011915 km
12.30 km/s
2061-Dec-24 16:41 0.379458 AU
56766045 km
4.04 km/s
2066-Aug-10 05:43 0.493117 AU
73769305 km
18.07 km/s
2067-Jan-18 06:06 0.492006 AU
73603051 km
6.31 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
22.45

Orbit Quality

RMS
0.4072
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.

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