SpaceAtlas Space Object Data
NASA JPL SBDB · 2015 FM33

2015 FM33

2015 FM33 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.985 AU and a period of 0.98 yr.

Aten Observations: 27
Orbital Period · P
0.98 yr
v(q)
36.6 km/s
v(Q)
24.6 km/s
Diameter · ≈
0.04 km
TJ
6.12
Eccentricity · e
0.1961

Orbit and dynamics

Between its closest point (0.792 AU) and its farthest (1.178 AU), the heliocentric distance changes by 0.386 AU over every revolution.

One full revolution takes 0.98 yr (357 days), computed from the semi-major axis of 0.985 AU.

An eccentricity of 0.196 makes the orbit moderately elongated.

The orbital plane is tilted 11.1° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 36.6 km/s at perihelion and falls to 24.6 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 = 24.6 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.04 km.

Observation record and orbit quality

Astrometry from 27 individual observations underpins this orbit; the fit leaves an RMS residual of 0.5415 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
0.9851 AU
Eccentricity
0.1961
Perihelion
0.792 AU
Aphelion
1.178278 AU
Inclination
11.1°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
288.21°

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
2056-Mar-02 17:26 0.450729 AU
67428101 km
19.94 km/s
2057-Feb-25 20:18 0.317614 AU
47514409 km
15.98 km/s
2058-Feb-21 20:29 0.184625 AU
27619554 km
12.13 km/s
2059-Feb-20 13:17 0.066997 AU
10022646 km
8.75 km/s
2060-Feb-27 18:48 0.091119 AU
13631245 km
6.76 km/s
2060-Dec-05 16:08 0.246165 AU
36825689 km
5.55 km/s
2061-Mar-20 02:59 0.180237 AU
26963103 km
6.60 km/s
2061-Oct-30 04:35 0.245480 AU
36723216 km
7.74 km/s
2062-Apr-16 02:14 0.238090 AU
35617687 km
6.36 km/s
2062-Oct-02 05:45 0.210784 AU
31532805 km
8.12 km/s
2063-May-29 03:55 0.252659 AU
37797215 km
4.56 km/s
2063-Sep-05 16:35 0.159212 AU
23817782 km
7.77 km/s
2064-Aug-11 01:40 0.120903 AU
18086774 km
7.89 km/s
2065-Jul-24 17:46 0.159779 AU
23902601 km
9.88 km/s
2066-Jul-13 16:41 0.260125 AU
38914095 km
13.09 km/s
2067-Jul-05 07:31 0.379076 AU
56708947 km
16.72 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
24.6

Orbit Quality

RMS
0.5415
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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