SpaceAtlas Space Object Data
NASA JPL SBDB · 2010 RF12

2010 RF12

2010 RF12 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.061 AU it takes 1.09 yr to circle the Sun.

Apollo Observations: 339
Orbital Period · P
1.09 yr
v(q)
35 km/s
v(Q)
23.9 km/s
Diameter · ≈
0.01 km
TJ
5.79
Eccentricity · e
0.1883

Orbit and dynamics

Between its closest point (0.862 AU) and its farthest (1.261 AU), the heliocentric distance changes by 0.399 AU over every revolution.

One full revolution takes 1.09 yr (399 days), computed from the semi-major axis of 1.061 AU.

An eccentricity of 0.188 makes the orbit moderately elongated.

Its inclination of 0.88° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 35 km/s at perihelion and falls to 23.9 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 = 28.42 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.01 km.

Observation record and orbit quality

Astrometry from 339 individual observations underpins this orbit; the fit leaves an RMS residual of 0.2964 arcseconds.

Condition code U = 2 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
1.061 AU
Eccentricity
0.1883
Perihelion
0.862 AU
Aphelion
1.260786 AU
Inclination
0.88°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
86.32°

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
2033-Aug-21 13:06 0.335574 AU
50201130 km
15.01 km/s
2034-Jul-16 23:30 0.196728 AU
29430120 km
4.37 km/s
2034-Dec-02 15:46 0.125105 AU
18715501 km
4.77 km/s
2035-Apr-10 21:56 0.188938 AU
28264677 km
4.29 km/s
2036-Mar-09 22:38 0.361011 AU
54006443 km
15.96 km/s
2045-Aug-29 17:22 0.167367 AU
25037814 km
10.05 km/s
2046-Jun-17 06:42 0.239839 AU
35879405 km
5.29 km/s
2047-Feb-09 20:57 0.057959 AU
8670566 km
3.47 km/s
2057-Aug-31 22:08 0.115032 AU
17208546 km
8.50 km/s
2058-Jun-10 10:58 0.242594 AU
36291493 km
5.37 km/s
2059-Feb-17 12:08 0.023589 AU
3528821 km
4.44 km/s
2069-Aug-17 07:14 0.377883 AU
56530560 km
16.26 km/s
2070-Aug-05 08:51 0.150913 AU
22576206 km
3.33 km/s
2070-Nov-01 05:32 0.116535 AU
17433340 km
4.36 km/s
2071-Apr-30 01:48 0.219420 AU
32824744 km
5.00 km/s
2072-Mar-03 01:22 0.221478 AU
33132600 km
11.78 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
28.42

Orbit Quality

RMS
0.29644
Condition
2
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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