SpaceAtlas Space Object Data
NASA JPL SBDB · 2019 SF2

2019 SF2

2019 SF2 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.333 AU once every 1.54 yr.

Amor Observations: 77
Orbital Period · P
1.54 yr
v(q)
32 km/s
v(Q)
20.8 km/s
Diameter · ≈
0.08 km
TJ
4.89
Eccentricity · e
0.212

Orbit and dynamics

The path is an ellipse reaching 1.05 AU from the Sun at perihelion and 1.616 AU at aphelion, a radial span of 0.566 AU.

Applying Kepler's third law to a = 1.333 AU gives an orbital period of 1.54 yr, or about 562 days.

An eccentricity of 0.212 makes the orbit moderately elongated.

Its inclination of 3.32° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 32 km/s at perihelion and falls to 20.8 km/s at aphelion.

Its perihelion lies just outside Earth's orbit, which is why it is classed as Earth-approaching rather than Earth-crossing.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 23.3 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.08 km.

Observation record and orbit quality

The current orbit solution is based on 77 observations and has a weighted RMS residual of 0.5878 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
1.333 AU
Eccentricity
0.212
Perihelion
1.05 AU
Aphelion
1.615596 AU
Inclination
3.32°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
85.93°

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
2036-Oct-28 17:22 0.383416 AU
57358252 km
11.51 km/s
2037-Feb-11 02:25 0.317431 AU
47487004 km
3.90 km/s
2039-Dec-03 03:09 0.142292 AU
21286654 km
4.69 km/s
2042-Jul-31 17:13 0.426030 AU
63733196 km
5.87 km/s
2054-Mar-25 19:16 0.487913 AU
72990728 km
6.92 km/s
2056-Nov-05 07:44 0.317539 AU
47503136 km
9.25 km/s
2057-Jan-31 22:51 0.279890 AU
41870886 km
3.12 km/s
2059-Oct-01 23:13 0.218869 AU
32742262 km
0.65 km/s
2059-Dec-05 18:07 0.215783 AU
32280664 km
6.80 km/s
2062-Jul-24 16:26 0.455077 AU
68078545 km
6.36 km/s
2074-Mar-17 10:40 0.454991 AU
68065710 km
6.39 km/s
2077-Jan-05 10:55 0.204444 AU
30584316 km
1.74 km/s
2079-Sep-05 17:58 0.288887 AU
43216857 km
3.02 km/s
2079-Dec-10 03:18 0.326330 AU
48818325 km
9.96 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
23.3

Orbit Quality

RMS
0.58783
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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