SpaceAtlas Space Object Data
NASA JPL SBDB · 2005 RB3

2005 RB3

2005 RB3 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.878 AU and a period of 0.82 yr.

Aten Observations: 102
Orbital Period · P
0.82 yr
v(q)
48.2 km/s
v(Q)
21 km/s
Diameter · ≈
0.11 km
TJ
6.54
Eccentricity · e
0.3937

Orbit and dynamics

Between its closest point (0.532 AU) and its farthest (1.223 AU), the heliocentric distance changes by 0.691 AU over every revolution.

One full revolution takes 0.82 yr (300 days), computed from the semi-major axis of 0.878 AU.

An eccentricity of 0.394 makes the orbit moderately elongated.

A steep inclination of 36.11° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 48.2 km/s at perihelion and falls to 21 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 = 22.61 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.11 km.

Observation record and orbit quality

Astrometry from 102 individual observations underpins this orbit; the fit leaves an RMS residual of 0.504 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
0.8776 AU
Eccentricity
0.3937
Perihelion
0.532 AU
Aphelion
1.223111 AU
Inclination
36.11°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
340.41°

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
2028-Mar-02 13:49 0.426165 AU
63753404 km
27.47 km/s
2028-Sep-10 14:13 0.143184 AU
21420090 km
17.98 km/s
2033-Sep-05 20:56 0.229011 AU
34259529 km
23.73 km/s
2037-Mar-24 20:39 0.411871 AU
61615045 km
26.83 km/s
2037-Sep-05 04:22 0.342484 AU
51234827 km
17.49 km/s
2042-Feb-18 10:26 0.459286 AU
68708220 km
27.67 km/s
2042-Sep-10 23:17 0.048982 AU
7327663 km
19.39 km/s
2046-Apr-15 20:14 0.462477 AU
69185553 km
26.35 km/s
2047-Sep-01 18:18 0.367940 AU
55043067 km
27.18 km/s
2051-Mar-12 02:17 0.412879 AU
61765749 km
27.23 km/s
2051-Sep-10 01:21 0.223557 AU
33443659 km
17.54 km/s
2056-Sep-08 00:48 0.145571 AU
21777044 km
21.87 km/s
2060-Apr-01 10:27 0.423130 AU
63299326 km
26.62 km/s
2060-Sep-01 10:16 0.404897 AU
60571784 km
17.65 km/s
2065-Feb-25 15:33 0.438346 AU
65575686 km
27.59 km/s
2065-Sep-11 04:14 0.093708 AU
14018488 km
18.45 km/s
2069-Apr-23 03:31 0.491675 AU
73553477 km
26.28 km/s
2070-Sep-04 05:59 0.291907 AU
43668648 km
25.25 km/s
2074-Mar-19 00:44 0.409006 AU
61186455 km
27.01 km/s
2074-Sep-07 22:26 0.288010 AU
43085755 km
17.44 km/s
2079-Feb-12 02:18 0.480785 AU
71924408 km
27.66 km/s
2079-Sep-10 08:50 0.079806 AU
11938745 km
20.47 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
22.61

Orbit Quality

RMS
0.50396
Condition
1
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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