SpaceAtlas Space Object Data
NASA JPL SBDB · 2016 LJ49

2016 LJ49

2016 LJ49 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.026 AU it takes 1.04 yr to circle the Sun.

Apollo Observations: 82
Orbital Period · P
1.04 yr
v(q)
59.8 km/s
v(Q)
14.5 km/s
Diameter · ≈
0.13 km
TJ
5.76
Eccentricity · e
0.6106

Orbit and dynamics

Between its closest point (0.4 AU) and its farthest (1.652 AU), the heliocentric distance changes by 1.252 AU over every revolution.

One full revolution takes 1.04 yr (380 days), computed from the semi-major axis of 1.026 AU.

The high eccentricity (0.611) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 10.44° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 59.8 km/s at perihelion and falls to 14.5 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 = 22.2 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.13 km.

Observation record and orbit quality

Astrometry from 82 individual observations underpins this orbit; the fit leaves an RMS residual of 0.4522 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
1.026 AU
Eccentricity
0.6106
Perihelion
0.4 AU
Aphelion
1.652476 AU
Inclination
10.44°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
317.42°

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
2031-Aug-18 23:17 0.438885 AU
65656313 km
31.56 km/s
2032-Aug-29 02:03 0.245192 AU
36680207 km
24.43 km/s
2033-Sep-08 14:50 0.181055 AU
27085467 km
17.37 km/s
2034-Sep-09 12:44 0.342292 AU
51206083 km
11.61 km/s
2035-Nov-11 22:00 0.489000 AU
73153361 km
19.69 km/s
2041-Jun-01 14:27 0.481226 AU
71990349 km
13.52 km/s
2042-May-16 12:40 0.316747 AU
47384656 km
12.82 km/s
2043-May-12 07:39 0.092767 AU
13877771 km
16.83 km/s
2044-May-19 10:54 0.140581 AU
21030675 km
23.50 km/s
2045-May-29 16:56 0.368877 AU
55183254 km
30.55 km/s
2057-Aug-16 16:24 0.475385 AU
71116650 km
32.83 km/s
2058-Aug-27 17:54 0.277223 AU
41471900 km
25.72 km/s
2059-Sep-07 09:36 0.171242 AU
25617368 km
18.69 km/s
2060-Sep-12 10:39 0.304555 AU
45560839 km
12.20 km/s
2061-Aug-20 23:37 0.477036 AU
71363644 km
12.60 km/s
2061-Nov-05 22:08 0.470675 AU
70411953 km
18.06 km/s
2068-May-19 19:36 0.360084 AU
53867827 km
12.78 km/s
2069-May-11 02:52 0.145289 AU
21734977 km
15.46 km/s
2070-May-18 00:24 0.088649 AU
13261714 km
21.97 km/s
2071-May-28 01:20 0.319414 AU
47783657 km
29.00 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
22.2

Orbit Quality

RMS
0.45221
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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