SpaceAtlas Space Object Data
NASA JPL SBDB · 504800

504800

504800 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.013 AU it takes 1.02 yr to circle the Sun.

Apollo Observations: 158
Orbital Period · P
1.02 yr
v(q)
36.9 km/s
v(Q)
23.7 km/s
Diameter · ≈
0.18 km
TJ
5.92
Eccentricity · e
0.2178

Orbit and dynamics

The path is an ellipse reaching 0.792 AU from the Sun at perihelion and 1.234 AU at aphelion, a radial span of 0.442 AU.

Applying Kepler's third law to a = 1.013 AU gives an orbital period of 1.02 yr, or about 372 days.

An eccentricity of 0.218 makes the orbit moderately elongated.

A steep inclination of 24.02° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 36.9 km/s at perihelion and falls to 23.7 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

The measured diameter is 0.38 km, a value from direct size determination rather than from brightness alone.

Its geometric albedo of 0.032 indicates a very dark, carbonaceous-type surface.

Observation record and orbit quality

The current orbit solution is based on 158 observations and has a weighted RMS residual of 0.4812 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
1.013 AU
Eccentricity
0.2178
Perihelion
0.792 AU
Aphelion
1.233631 AU
Inclination
24.02°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
299.09°

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
2061-Feb-07 19:25 0.497681 AU
74452074 km
25.38 km/s
2062-Feb-14 00:02 0.385157 AU
57618606 km
22.37 km/s
2063-Feb-20 10:00 0.272510 AU
40766908 km
19.57 km/s
2064-Feb-27 05:29 0.164107 AU
24550072 km
17.05 km/s
2065-Mar-05 13:38 0.083120 AU
12434644 km
15.05 km/s
2066-Mar-13 20:51 0.115037 AU
17209315 km
13.71 km/s
2067-Mar-24 04:45 0.212731 AU
31824040 km
13.16 km/s
2068-Apr-06 18:41 0.316420 AU
47335687 km
13.26 km/s
2068-Oct-09 16:21 0.469703 AU
70266633 km
11.90 km/s
2069-May-03 12:40 0.408422 AU
61099106 km
12.38 km/s
2069-Sep-21 17:12 0.379077 AU
56709146 km
12.33 km/s
2070-Sep-13 16:26 0.275093 AU
41153363 km
12.09 km/s
2071-Sep-11 16:20 0.165925 AU
24822002 km
12.26 km/s
2072-Sep-11 20:31 0.057512 AU
8603610 km
13.22 km/s
2073-Sep-14 11:37 0.059763 AU
8940364 km
14.82 km/s
2074-Sep-18 01:11 0.170120 AU
25449563 km
17.02 km/s
2075-Sep-22 03:59 0.282842 AU
42312620 km
19.59 km/s
2076-Sep-25 12:55 0.395462 AU
59160291 km
22.41 km/s

Distances in astronomical units (AU) and kilometres. Source: NASA/JPL CNEOS Close Approach Data API.

Physical Parameters

Diameter
0.38 km
Albedo
0.032
Density
— g/cm³
Rotation Period
— h
Absolute Magnitude
21.48

Orbit Quality

RMS
0.48123
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

Explore asteroids, comets and near-Earth objects with JPL orbital data.