SpaceAtlas Space Object Data
NASA JPL SBDB · 1998 VE31

1998 VE31

1998 VE31 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.051 AU it takes 1.08 yr to circle the Sun.

Apollo Observations: 146
Orbital Period · P
1.08 yr
v(q)
35.2 km/s
v(Q)
24 km/s
Diameter · ≈
0.23 km
TJ
5.77
Eccentricity · e
0.1902

Orbit and dynamics

Between its closest point (0.851 AU) and its farthest (1.251 AU), the heliocentric distance changes by 0.4 AU over every revolution.

One full revolution takes 1.08 yr (394 days), computed from the semi-major axis of 1.051 AU.

An eccentricity of 0.19 makes the orbit moderately elongated.

A steep inclination of 21.95° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 35.2 km/s at perihelion and falls to 24 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 = 20.99 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.23 km.

Observation record and orbit quality

Astrometry from 146 individual observations underpins this orbit; the fit leaves an RMS residual of 0.7078 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
1.051 AU
Eccentricity
0.1902
Perihelion
0.851 AU
Aphelion
1.2509 AU
Inclination
21.95°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
330.48°

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
2026-Nov-09 00:15 0.178499 AU
26703002 km
12.13 km/s
2039-May-08 15:17 0.127255 AU
19037059 km
13.61 km/s
2040-Nov-08 04:09 0.178332 AU
26678054 km
12.17 km/s
2053-May-08 23:05 0.125438 AU
18765263 km
13.55 km/s
2054-Nov-08 08:11 0.178348 AU
26680543 km
12.21 km/s
2067-May-10 05:56 0.124058 AU
18558827 km
13.49 km/s
2068-Nov-07 13:34 0.178506 AU
26704074 km
12.24 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
20.99

Orbit Quality

RMS
0.70785
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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