SpaceAtlas Space Object Data
NASA JPL SBDB · 501647

501647

501647 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.978 AU and a period of 0.97 yr.

Aten Observations: 271
Orbital Period · P
0.97 yr
v(q)
42.4 km/s
v(Q)
21.4 km/s
Diameter · ≈
0.12 km
TJ
6.14
Eccentricity · e
0.3309

Orbit and dynamics

Between its closest point (0.655 AU) and its farthest (1.302 AU), the heliocentric distance changes by 0.647 AU over every revolution.

One full revolution takes 0.97 yr (353 days), computed from the semi-major axis of 0.978 AU.

An eccentricity of 0.331 makes the orbit moderately elongated.

Its inclination of 4.59° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 42.4 km/s at perihelion and falls to 21.4 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 = 22.36 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.12 km.

Observation record and orbit quality

Astrometry from 271 individual observations underpins this orbit; the fit leaves an RMS residual of 0.3966 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
0.9782 AU
Eccentricity
0.3309
Perihelion
0.655 AU
Aphelion
1.301886 AU
Inclination
4.59°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
156.85°

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
2042-Aug-24 04:58 0.342041 AU
51168654 km
20.43 km/s
2043-Aug-15 22:19 0.145954 AU
21834354 km
14.39 km/s
2044-Aug-08 03:24 0.074819 AU
11192712 km
8.51 km/s
2045-Jun-24 07:42 0.256008 AU
38298318 km
7.53 km/s
2045-Sep-05 18:49 0.239111 AU
35770561 km
7.05 km/s
2046-May-19 09:50 0.331466 AU
49586596 km
11.39 km/s
2046-Oct-04 13:59 0.307972 AU
46072017 km
8.32 km/s
2047-Apr-21 15:32 0.354800 AU
53077368 km
12.77 km/s
2047-Oct-28 11:24 0.312171 AU
46700182 km
8.48 km/s
2048-Mar-24 12:32 0.340111 AU
50879818 km
12.05 km/s
2048-Nov-22 18:19 0.255086 AU
38160327 km
7.61 km/s
2049-Feb-20 07:02 0.279013 AU
41739676 km
8.83 km/s
2049-Dec-26 11:12 0.099940 AU
14950835 km
7.51 km/s
2050-Dec-22 07:39 0.111735 AU
16715372 km
13.61 km/s
2051-Dec-14 00:05 0.319634 AU
47816584 km
20.04 km/s
2070-Aug-29 11:00 0.455235 AU
68102126 km
23.91 km/s
2071-Aug-20 18:47 0.253687 AU
37951043 km
17.69 km/s
2072-Aug-11 15:05 0.061717 AU
9232681 km
11.55 km/s
2073-Aug-13 23:10 0.163332 AU
24434189 km
6.26 km/s
2074-Jun-04 22:50 0.301701 AU
45133873 km
9.79 km/s
2074-Sep-21 15:37 0.282245 AU
42223201 km
7.84 km/s
2075-May-05 14:26 0.347869 AU
52040417 km
12.33 km/s
2075-Oct-17 00:12 0.316714 AU
47379770 km
8.51 km/s
2076-Apr-07 11:26 0.352033 AU
52663353 km
12.66 km/s
2076-Nov-09 12:09 0.290918 AU
43520687 km
8.17 km/s
2077-Mar-09 12:06 0.315984 AU
47270476 km
10.76 km/s
2077-Dec-11 17:19 0.189789 AU
28391992 km
6.72 km/s
2078-Dec-26 00:49 0.019316 AU
2889624 km
10.62 km/s
2079-Dec-18 02:33 0.229381 AU
34314900 km
17.26 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
22.36

Orbit Quality

RMS
0.39658
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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