SpaceAtlas Space Object Data
NASA JPL SBDB · 2015 RT1

2015 RT1

2015 RT1 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.955 AU and a period of 0.93 yr.

Aten Observations: 76
Orbital Period · P
0.93 yr
v(q)
39.6 km/s
v(Q)
23.5 km/s
Diameter · ≈
0.03 km
TJ
6.28
Eccentricity · e
0.2552

Orbit and dynamics

Between its closest point (0.711 AU) and its farthest (1.198 AU), the heliocentric distance changes by 0.487 AU over every revolution.

One full revolution takes 0.93 yr (341 days), computed from the semi-major axis of 0.955 AU.

An eccentricity of 0.255 makes the orbit moderately elongated.

Its inclination of 1.79° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 39.6 km/s at perihelion and falls to 23.5 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 = 25.41 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.03 km.

Observation record and orbit quality

Astrometry from 76 individual observations underpins this orbit; the fit leaves an RMS residual of 0.409 arcseconds.

Condition code U = 4 indicates a moderately constrained orbit; predictions decades ahead still carry noticeable uncertainty.

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
0.9546 AU
Eccentricity
0.2552
Perihelion
0.711 AU
Aphelion
1.198214 AU
Inclination
1.79°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
294.97°

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-Sep-04 13:21 0.328595 AU
49157174 km
17.67 km/s
2029-Aug-27 16:40 0.076861 AU
11498241 km
5.64 km/s
2030-May-15 10:22 0.292041 AU
43688743 km
9.67 km/s
2030-Nov-16 03:58 0.195057 AU
29180119 km
6.32 km/s
2031-Mar-09 13:22 0.242604 AU
36293096 km
7.57 km/s
2031-Dec-31 07:58 0.135262 AU
20234860 km
11.81 km/s
2042-Aug-31 02:09 0.201845 AU
30195611 km
13.81 km/s
2043-Jul-09 12:25 0.209996 AU
31415022 km
5.32 km/s
2043-Sep-27 19:55 0.169161 AU
25306178 km
5.84 km/s
2044-Apr-24 00:54 0.295988 AU
44279145 km
10.00 km/s
2044-Dec-15 04:55 0.135900 AU
20330348 km
5.32 km/s
2045-Dec-24 23:59 0.280050 AU
41894834 km
16.34 km/s
2055-Sep-09 03:11 0.419968 AU
62826300 km
20.47 km/s
2056-Aug-24 14:16 0.012091 AU
1808750 km
8.03 km/s
2057-Jun-02 00:59 0.272944 AU
40831810 km
8.62 km/s
2057-Oct-27 14:55 0.208058 AU
31124973 km
6.53 km/s
2058-Apr-01 03:51 0.275537 AU
41219803 km
9.16 km/s
2059-Jan-05 04:26 0.031357 AU
4691006 km
7.33 km/s
2059-Dec-22 04:50 0.384869 AU
57575526 km
19.61 km/s
2070-Sep-02 04:25 0.260588 AU
38983403 km
15.57 km/s
2071-Sep-07 03:35 0.120024 AU
17955281 km
5.19 km/s
2072-May-09 19:21 0.292218 AU
43715235 km
9.75 km/s
2072-Nov-20 20:02 0.190773 AU
28539271 km
6.18 km/s
2073-Mar-05 07:14 0.232171 AU
34732292 km
7.09 km/s
2073-Dec-29 21:49 0.151031 AU
22593869 km
12.19 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
25.41

Orbit Quality

RMS
0.40904
Condition
4
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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