SpaceAtlas Space Object Data
NASA JPL SBDB · 2011 GP59

2011 GP59

2011 GP59 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.869 AU and a period of 0.81 yr.

Aten Observations: 225
Orbital Period · P
0.81 yr
v(q)
41.6 km/s
v(Q)
24.5 km/s
Diameter · ≈
0.05 km
TJ
6.77
Eccentricity · e
0.2578

Orbit and dynamics

Between its closest point (0.645 AU) and its farthest (1.093 AU), the heliocentric distance changes by 0.448 AU over every revolution.

One full revolution takes 0.81 yr (296 days), computed from the semi-major axis of 0.869 AU.

An eccentricity of 0.258 makes the orbit moderately elongated.

The orbital plane is tilted 8.51° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 41.6 km/s at perihelion and falls to 24.5 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 = 24.3 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.05 km.

Observation record and orbit quality

Astrometry from 225 individual observations underpins this orbit; the fit leaves an RMS residual of 0.2668 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
0.869 AU
Eccentricity
0.2578
Perihelion
0.645 AU
Aphelion
1.093028 AU
Inclination
8.51°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
136.43°

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
2027-Nov-03 09:22 0.287837 AU
43059804 km
9.48 km/s
2028-Apr-08 22:18 0.065919 AU
9861370 km
6.65 km/s
2032-Jan-14 09:49 0.145624 AU
21785104 km
6.84 km/s
2032-Jul-10 06:22 0.336003 AU
50265281 km
8.70 km/s
2036-Jan-22 11:54 0.343574 AU
51397903 km
16.86 km/s
2036-Aug-24 09:00 0.374720 AU
56057267 km
12.38 km/s
2037-Apr-05 00:02 0.434373 AU
64981262 km
20.99 km/s
2040-Oct-04 01:04 0.341874 AU
51143680 km
11.91 km/s
2041-Apr-15 07:06 0.125303 AU
18745091 km
11.49 km/s
2044-Nov-23 15:01 0.242333 AU
36252530 km
7.19 km/s
2045-Mar-14 23:54 0.136696 AU
20449483 km
6.35 km/s
2049-Jan-14 04:05 0.182669 AU
27326825 km
10.52 km/s
2049-Jul-28 16:37 0.361078 AU
54016427 km
10.61 km/s
2053-Jan-26 19:00 0.449984 AU
67316698 km
20.53 km/s
2053-Sep-08 09:02 0.369721 AU
55309532 km
12.67 km/s
2054-Apr-09 14:08 0.322981 AU
48317220 km
17.50 km/s
2057-Oct-19 23:40 0.315326 AU
47172070 km
10.80 km/s
2058-Apr-16 00:28 0.016054 AU
2401684 km
8.43 km/s
2061-Dec-02 08:57 0.228635 AU
34203257 km
6.31 km/s
2062-Mar-08 07:34 0.143843 AU
21518600 km
6.35 km/s
2066-Jan-14 06:45 0.153929 AU
23027427 km
8.61 km/s
2066-Jul-19 06:19 0.350545 AU
52440777 km
9.68 km/s
2070-Jan-21 21:18 0.318582 AU
47659125 km
16.00 km/s
2070-Aug-20 15:16 0.376530 AU
56328149 km
12.32 km/s
2071-Apr-03 22:20 0.479383 AU
71714615 km
22.42 km/s
2074-Sep-19 19:26 0.363197 AU
54333513 km
12.64 km/s
2075-Apr-12 10:24 0.248523 AU
37178455 km
15.22 km/s
2078-Oct-20 09:35 0.318233 AU
47607002 km
10.90 km/s
2079-Apr-16 08:06 0.025854 AU
3867654 km
8.67 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
24.3

Orbit Quality

RMS
0.2668
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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